C Series Variable Displacement
Axial Piston Pumps For
Closed-Circuit Applications
HY28-2686-01/C/US Revised August 2022
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
2
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Contents
Contents
WARNING - USER RESPONSIBILITY
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS
CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker-Hannin Corporation, its subsidiaries and authorized distributors provide product
or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely
responsible for making the nal selection of the system and components and assuring that all performance, endurance, maintenance,
safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable
industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided
from Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide
component or system options based upon data or specications provided by the user, the user is responsible for determining that such
data and specications are suitable and sufcient for all applications and reasonably foreseeable uses of the components or systems.
Offer of Sale
The items described in this document are hereby offered for sale by Parker-Hannin Corporation, its subsidiaries or its authorized distributor.
This offer and its acceptance are governed by the provisions stated in the detailed “Offer of Sale” elsewhere in this document.
!!
Contents
General Information .................................................................................................................................................................... 1
Model Codes
................................................................................................................................................................................ 2
Technical Data
............................................................................................................................................................................. 6
Efficiency Information
................................................................................................................................................................. 8
C055 ................................................................................................................................................................................... 8
C081 ................................................................................................................................................................................... 9
C136 ................................................................................................................................................................................. 10
Controls
...................................................................................................................................................................................... 11
Manual Lever Control With Feedback – A ........................................................................................................................ 11
Hydraulic Proportional Control With Feedback – C ......................................................................................................... 13
Hydraulic Proportional Control Without Feedback – D .................................................................................................... 15
Electric Non-Proportional – E ...........................................................................................................................................17
Electric Proportional Control With Feedback – F ............................................................................................................ 19
Electric Proportional Control Without Feedback – G ....................................................................................................... 22
Electric Proportional Control With Hydraulic Emergency Override – H ............................................................................25
Automotive – J/K .............................................................................................................................................................. 28
Fan Drive Control – R .......................................................................................................................................................30
Pressure Override Options
....................................................................................................................................................... 30
Pressure Override – P ....................................................................................................................................................... 32
Electric Cut-Off Valve – E ................................................................................................................................................. 33
Electrical Cut-Off Valve and Pressure ...............................................................................................................................34
Charge Filtration Options
......................................................................................................................................................... 35
Remote Charge Filtration – R ........................................................................................................................................... 37
Dimensions – C55
...................................................................................................................................................................... 37
Pump and Controls ...........................................................................................................................................................39
Shaft ................................................................................................................................................................................. 43
Through Drives .................................................................................................................................................................44
Dimensions – C081
.................................................................................................................................................................... 46
Pump and Controls ...........................................................................................................................................................46
Shaft ................................................................................................................................................................................ 52
Pump and Accessories ..................................................................................................................................................... 53
Through Drives .................................................................................................................................................................56
Dimensions – C136
.................................................................................................................................................................... 58
Pump and Controls ...........................................................................................................................................................58
Shaft ................................................................................................................................................................................ 62
Pump and Accessories ..................................................................................................................................................... 63
Through Drives .................................................................................................................................................................64
Installation Information
............................................................................................................................................................. 68
Offer Of Sale
............................................................................................................................................................................... 72
Revisions
.................................................................................................................................................................................... 73
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
1
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
General Information
C Series variable displacement piston pumps have
been designed for use in closed circuit hydrostatic
applications. The ow direction is controlled by a
rugged swash plate and bearing design. Units are rated
to operate at pressure up to 420 bar (6090 PSI).
Parker C Series offers a full range of controls:
• Manual lever with feedback
• Hydraulic proportional with or without feedback
• Electric proportional with or without feedback
• Electric on-off
• Electric proportional with hydraulic override
• Automotive
With two cross port relief valves, C Series pumps are
protected from pressure overloads. The charge pump
circuit features a gerotor pump with three displacement
options, while the pump design performs with a variety
of accessories, including:
• Hydraulic pressure compensator
• Electric cut-off valve
• Combination hydraulic pressure/electric cut-off
• Flushing valve
• Charge pressure filter with electric
or mechanical clogging sensor
Basic Closed Circuit
In a closed circuit transmission, both work ports of
the hydraulic pump are connected to the hydraulic
actuator, typically a hydraulic motor. In a closed circuit
transmission, uid can ow out of either port of the
pump to the actuator and return via the opposite port.
The position of the swash plate in the pump determines
ow direction in the circuit.
The closed circuit pump and actuator will (normally)
have case drains which will allow for hot oil to be
removed from the circuit for cooling and ltering.
Fluid removed from the circuit is replaced by the uid
supplied by the charge pump. The charge pump is a
xed displacement pump, typically a gerotor unit, that’s
primary purpose is to supply oil into the closed circuit
to make up for losses and to provide control ow to
the pump displacement controls.
General Information
Typical C081 and an F12-060 with Integrated
Flushing Valve Option L01
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
2
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Model Codes
Pump Series
C C Series closed circuit pump
Rotation
R CW (clockwise)
L CCW (counter clockwise)
As viewed looking at the shaft
Charge Pump 055 081 136
A 18 cc/rev (1.1 CIR) # # —
B 23.1 cc/rev (1.41 CIR) — X X
C 27.3 cc/rev (1.65 CIR) — X #
D 11 cc/rev (0.67 CIR) X — —
E 14 cc/rev (0.85 CIR) X — —
X No charge pump X X X
# = Standard option
X = Available
— = Not available
Pump Control
A Manual lever
C
Hydraulic proportional control with
internal feedback
D
Hydraulic proportional control without
internal feedback
E Electric non proportional
F Electric proportional with internal feedback
G Electric proportional without internal feedback
H
Electric proportional with internal feedback
and hydraulic override
J Automotive control electrical
K Automotive control hydraulic
R Fan drive control
Displacement
055 055 cc/rev (3.35 CIR)
081 081 cc/rev (4.94 CIR)
136 136 cc/rev (8.3 CIR)
Mount and Port Options
C
SAE C 2/4 bolt mount with SAE ports
(C055 and C081 only)
D
SAE D 2/4 bolt mount with SAE ports
(C136 only)
G
SAE C 2/4 bolt mount with ISO ports
(C055 and C081 only)
H
SAE D 2/4 bolt mount with ISO ports
(C136 only)
Input Shaft 055 081 136
1
SAE C 14T 12/24 DP 1 1/4"
OD ANSI B92.1a-1976
# # —
2
21T 16/32 DP 1 3/8" OD ANSI
B92.1a-1976
X X —
3
SAE D-E 13T 8/16 DP 1 3/4"
OD ANSI B92.1a-1976
— — #
4
SAE F 15T 8/16 DP 2" OD
ANSI B92.1a-1976
— — X
5
23T 16/32 DP 1 1/2" OD ANSI
B92.1a-1976
— — X
6
27T 16/32 DP 1 3/4" OD ANSI
B92.1a-1976
— — X
7 W40x2x30x18 DIN 5480 — — X
8 W45x2x30x21 DIN 5480 — — X
# = Standard option
X = Available
— = Not available
Pump
Series
Input
Shaft
Charge
Pump
Control
Modifier
Pressure
Override
Charge
Filtration
Through
Drive
B Side
Displacement
B Side Cross
Port Relief
Mount
and Port
Displacement Displacement
Control
A Side Cross
Port Relief
Charge Relief
Setting
Override
Options
A Side
Displacement
OptionsRotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
3
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Model Codes
Pump Control Control Modifier
A C D E F G H J K R
Pump control selection determines what
modifier is used
# — A — — — — — — — <->
0 0 0
No control orices
— — X — — — — — — — <->
0 0 5
0.5 mm (.019 in) Control orice
— X X — — — — — — — <->
0 0 6
0.6 mm (.024 in) Control orice
— X X — — — — — — — <->
0 0 7
0.7 mm (.027 in) Control orice
— # X — — — — — — — <->
0 0 8
0.8 mm (.031 in) Control orice
— X # — — — — — — — <->
0 0 9
0.9 mm (.035 in) Control orice
— X X — — — — — — — <->
0 1 2
1.2 mm (.047 in) Control orice
— — — — X — — — —
# <
->
2 0 0
12 VDC, No control orice
— — — — X — — — — X <->
2 0 6
12 VDC, 0.6 mm (.024 in) Control orice
— — — — X — — — — X <->
2 0 7
12 VDC, 0.7 mm (.027 in) Control orice
— — — — # X X — —
X <->
2 0 8
12 VDC, 0.8 mm (.031 in) Control orice
— — — X X — — — — X <->
2 1 2
12 VDC, 1.2 mm (.047 in) Control orice
— — — — X — — — — X <->
2 2 0
12 VDC, 2.0 mm (.079 in) Control orice
— — — — X — — — —
# <
->
4 0 0
24 VDC, No control orice
— — — — X — — — — X <->
4 0 6
24 VDC, 0.6 mm (.024 in) Control orice
— — — — X — — — — X <->
4 0 7
24 VDC, 0.7 mm (.027 in) Control orice
— — — — # # # — —
X <->
4 0 8
24 VDC, 0.8 mm (.031 in) Control orice
— — — X X — — — — X <->
4 1 2
24 VDC, 1.2 mm (.047 in) Control orice
— — — — X — — — — X <->
4 2 0
24 VDC, 2.0 mm (.079 in) Control orice
— — — — — — — X — — <-> D
No inching valve, 12 VDC coils,
J control only
— — — — — — — X — — <-> E
Hydraulic inching valve,12 VDC coils,
J control only
— — — — — — — X — — <-> F
No inching valve, 24 VDC coils,
J control only
— — — — — — — X — — <-> G
Hydraulic inching valve, 24 VDC coils,
J control only
— — — — — — — — X — <-> H Hydraulic inching valve, K control only
— — — — — — — — X — <-> X No inching valve, K control only
— — — — — — — X X — <-> 2 1.2 mm (.047 in) Control orice
— — — — — — — X X — <-> 5 1.5 mm (.059 in) Control orice
— — — — — — — X X — <-> P Prepared for ushing valve
— — — — — — — X X — <-> 1
Flushing valve installed with
1.5 mm orice
— — — — — — — X X — <-> 2
Flushing valve installed with
2.0 mm orice
— — — — — — — X X — <-> 3
Flushing valve installed with
2.5 mm orice
# = Standard option
X = Available
— = Not available
A = Without pressure override only
Example modifier with J/K control
G 5 P
Hydraulic inching valve, 24VDC coils with
a 1.5 mm control orifice and prepared
for flushing
When ordering J/K control specify starting input RPM, input
RPM at rated torque and rated input torque (NM)
A Side Cross Port Relief
A 250 Bar (3625 PSI)
B 350 Bar (5075 PSI)
C 420 Bar (6090 PSI)
D 450 Bar (6525 PSI)
B Side Cross Port Relief
A 250 Bar (3625 PSI)
B 350 Bar (5075 PSI)
C 420 Bar (6090 PSI)
D 450 Bar (6525 PSI)
Charge Relief Setting
055 081 136
A 20 Bar (290 PSI)
X X
—
B 22 Bar (319 PSI)
# # #
C 25 Bar (362 PSI)
X X X
# = Standard option
X = Available
— = Not available
Pump
Series
Input
Shaft
Charge
Pump
Control
Modifier
Pressure
Override
Charge
Filtration
Through
Drive
B Side
Displacement
B Side Cross
Port Relief
Mount
and Port
Displacement Displacement
Control
A Side Cross
Port Relief
Charge Relief
Setting
Override
Options
A Side
Displacement
OptionsRotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
4
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Model Codes
Pump
Series
Input
Shaft
Charge
Pump
Control
Modifier
Pressure
Override
Charge
Filtration
Through
Drive
B Side
Displacement
B Side Cross
Port Relief
Mount
and Port
Displacement Displacement
Control
A Side Cross
Port Relief
Charge Relief
Setting
Override
Options
A Side
Displacement
OptionsRotation
Pressure Override Override Options
X P E C
Pressure override selection determines
override option
X — — — <-> X X
No pressure override
— X — — <-> 0 A
Locked
— X — — <-> 0 B
100 Bar (1450 PSI)
— X — — <-> 0 C
150 Bar (2175 PSI)
— X — — <-> 0 D
200 Bar (2900 PSI)
— X — — <-> 0 E
250 Bar (3625 PSI)
— X — — <-> 0 F
280 Bar (4060 PSI)
— X — — <-> 0 G
300 Bar (4350 PSI)
— X — — <-> 0 H
320 Bar (4712 PSI)
— X — — <-> 0 J
330 Bar (4785 PSI)
— X — — <-> 0 K
350 Bar (5075 PSI)
— X — — <-> 0 M
380 Bar (5510 PSI)
— X — — <-> 0 N
400 Bar (5800 PSI)
— — X — <-> 1 2
12 VDC coil
— — X — <-> 2 4
24 VDC coil
— — — X <-> 2 A
12VDC coil locked override
— — — X <-> 2 B
12VDC coil, 100 Bar (1450 PSI) override
— — — X <-> 2 C
12VDC coil, 150 Bar (2175 PSI) override
— — — X <-> 2 D
12VDC coil, 200 Bar (2900 PSI) override
— — — X <-> 2 E
12VDC coil, 250 Bar (3625 PSI) override
— — — X <-> 2 G
12VDC coil, 300 Bar (4350 PSI) override
— — — X <-> 2 K
12VDC coil, 350 Bar (5075 PSI) override
— — — X <-> 2 M
12VDC coil, 380 Bar (5510 PSI) override
— — — X <-> 2 N
12VDC coil, 400 Bar (5800 PSI) override
— — — X <-> 4 A
24 VDC coil locked override
— — — X <-> 4 B
24 VDC coil, 100 Bar (1450 PSI) override
— — — X <-> 4 C
24 VDC coil, 150 Bar (2175 PSI) override
— — — X <-> 4 D
24 VDC coil, 200 Bar (2900 PSI) override
— — — X <-> 4 E
24 VDC coil, 250 Bar (3625 PSI) override
— — — X <-> 4 G
24 VDC coil, 300 Bar (4350 PSI) override
— — — X <-> 4 K
24 VDC coil, 350 Bar (5075 PSI) override
— — — X <-> 4 M
24 VDC coil, 380 Bar (5510 PSI) override
— — — X <-> 4 N
24 VDC coil, 400 Bar (5800 PSI) override
X = Available
— = Not available
Pressure Override
X No pressure override
P Hydraulic internal pressure override
E Electrical override
C
Electrical override and hydraulic internal
pressure override
Override not available on J/K control.
Pressure override should be set 20-30 bar
below cross port relief settings.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
5
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Model Codes
Pump
Series
Input
Shaft
Charge
Pump
Control
Modifier
Pressure
Override
Charge
Filtration
Through
Drive
B Side
Displacement
B Side Cross
Port Relief
Mount
and Port
Displacement Displacement
Control
A Side Cross
Port Relief
Charge Relief
Setting
Override
Options
A Side
Displacement
OptionsRotation
Charge Filtration
055 081 136
X No charge lter # # #
N
Charge lter with 8 Bar
(116 PSI) mechanical
bypass indicator
X X X
G
Charge lter with 8
Bar (116 PSI) electrical
bypass indicator
X X X
R
Prepared for remote
charge pressure ltration
X X X
# = Standard option
X = Available
— = Not available
Through Drive
055 081 136
X No through drive # # #
A
SAE A mount, 9T
spline shaft
X X X
B
SAE B mount, 13T
spline shaft
X X X
G
SAE B mount, 15T
spline shaft
X X X
C
SAE C mount, 14T
spline shaft
X X X
H
SAE C mount, 17T
spline shaft
X X X
D
SAE D mount, 13T
spline shaft
X X X
# = Standard option
X = Available
— = Not available
A Side Displacement
00-99
Set displacement of A side
between 0-99%
XX XX = 100% displacement
B Side Displacement
00-99
Set displacement of B side
between 0-99%
XX XX = 100% displacement
Options
055 081 136
X No paint, no bypass valve # # #
Y
No paint with
bypass valve
X X —
P
Paint black, no
bypass valve
X X X
D
Paint black with
bypass valve
X X —
M
Special modication
contact technical support
# = Standard option
X = Available all displacements
— = Not available
Example Model Code
C081C1RAF208BBBP0HRAXXXXP
C081 = 81cc frame
C = SAE C 2/4 bolt mount with SAE ports
1 = SAE C 14T 12/24 DP 1-1/4" OD ANSI B92.1A-1976
R = CW rotation (looking at the shaft)
A = 81cc frame 18cc/rev (1.1 CIR) charge pump
F = Electric proportional with internal feedback displacement control
208 = 12 VDC, 0.8mm (.031 in) control orice
B = A side cross port relief set to 350 bar (5075 PSI)
B = B side cross port relief set to 350 bar (5075 PSI)
B = Charge relief set to 22 bar (319 PSI)
P = Hydraulic internal pressure override
0H = Pressure override set to 320 bar (4712 PSI)
R = Prepared for remote charge pressure ltration
A = SAE A mount through drive with 9T spline shaft coupling
XX = A side displacement set to 100%
XX = B side displacement set to 100%
P = Paint black, no bypass valve
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
6
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Technical Data
Displacement C055 C081 C136
Radial
Load
F
q
max N (lbf)
1900
(428)
2400
(540)
4600
(1035)
Axial
Load
F
ax
max N (lbf)
1500
(337)
3000
(674)
4000
(899)
Fq
X /2 X /2
Fax
Fluids
Only uids with mineral oil basis and anticorrosive,
antioxidant and wear-preventing agents (HL or
HM) should be used. Viscosity range at operating
temperature must be between 15 and 40 cSt. For
short periods and low starting temperatures, a
maximum viscosity of 800 cSt is allowed. Viscosities
less than 10 cSt are not permitted. In extreme operating
conditions, a viscosity range of 10 to 15 cSt is allowed
for short periods.
Operating Temperature
The oil’s operating temperature must be between
-13ºF and 194ºF (-25ºC and 90ºC). Running the
unit outside of these temperature ranges is not
recommended, and could negatively impact
performance.
Filtration
The C Series pump is available with a built-in charge
lter. Units also can be shipped with a block to permit
a remote-mounted lter. Parker suggests a remote
pressure lter with an element rating of 10 micron
absolute and a minimum beta ratio of 200. A visual or
electromechanical indicator is also suggested.
Correct ltration helps extend unit life. The maximum
permissible contamination class is 20/18/15 per
ISO 4406:1999. Suction lters are not suggested. If
needed, a 100-mesh (149-micron) strainer is the nest
mesh recommended.
Suction Pressure
The charge pump suction performs at a minimum
absolute pressure of 0.8 bar (11.6 psi). For short periods
and low starting temperatures, an absolute pressure of
0.5 bar (7.25 psi) is allowed. Inlet pressure may never
be lower.
Operating Pressure
Main pump: The maximum permissible continuous
pressure is 420 bar (6,090 psi).
Charge pump: Nominal pressure is 25 bar (360 psi).
Maximum admissible pressure is 40 bar (580 psi).
Case Drain Pressure
Maximum case drain pressure is 4 bar (58 psi). For short
periods and low starting temperatures, a pressure of
6 bar (86 psi) is allowed. Higher pressures can damage
the input shaft seal, reducing its life.
Seals
Parker C Series pumps use standard FKM (Viton
®
)
seals. In case of special uids, contact your Parker
distributor.
Displacement Limiting
An externally adjustable mechanical device limits
displacement by utilizing two setting screws to limit
to the control piston stroke.
Input Shaft: Radial and Axial Loads
The input shaft can stand both radial and axial loads.
Maximum permissible loads in the following table are
calculated to guarantee a service life of at least 80% of
that of bearings to which no load has been applied.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
7
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Technical Data
* Peak is defined as no longer than 1% of every minute. For long life, design
system to not run at maximum flow and pressure continuously.
C Series Technical Specifications
Frame C055 C081 C136
Displacement CC/Rev (CIR) 55 (3.35) 81 (4.94) 136 (8.3)
Input Speed (RPM)
Continuous 3800 3400 2850
Intermittent 4000 3600 3250
Minimum 500 500 500
System Pressure Bar (PSI)
Continuous 420 (6090)
Peak* 450 (6525)*
Charge Inlet
Pressure Bar (PSI) Absolute
Minimum .8 (11.6)
Cold Startup .5 (7.25)
Case Pressure Bar (PSI)
Maximum Continuous 4 (58)
Cold Startup 6 (86)
Fluid Viscosity cSt
Operating 15 to 40
Minimum 10
Cold Startup 800
Fluid Operating Temperature °F (°C) -13 to 194°F (-25 to 90°C)
Maximum Permissible Fluid
Cleanliness Per ISO 4406:1999
20/18/15
Power Consumption kW (HP)
Continuous 146 (196) 170 (228) 259 (347)
Peak 165 (221) 203 (272) 343 (459)
Maximum Torque at Maximum
Displacement Nm (lb-ft)
Continuous 368 (271) 478 (352) 858 (632)
Peak 394 (291) 537 (396) 980 (722)
Moment of Inertia Kg-m² (lbf-ft²) .0064 (.156) .014 (.34) .040 (.96)
Approximate Weight kg (lb) 46 (101) 51 (113) 86 (190)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
8
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Efficiency Information C055
Pump Outlet Pressure (Bar)
% Efficient
100
95
90
85
80
75
70
65
60
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
3000 RPM
Pump Outlet Pressure (Bar)
% Efficient
100
95
90
85
80
75
70
65
60
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
3000 RPM
Pump Outlet Pressure (Bar)
% Efficient
100
99
98
97
96
95
94
93
92
91
90
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
3000 RPM
C055 Volumetric Efficiency
C055 Overall Efficiency
C055 Mechanical Efficiency
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
9
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Efficiency Information C081
Pump Outlet Pressure (Bar)
Kw
120
100
80
60
40
20
0
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
Pump Outlet Pressure (Bar)
% Efficient
100
95
90
85
80
75
70
65
60
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
Pump Outlet Pressure (Bar)
% Efficient
100
95
90
85
80
75
70
65
60
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
Pump Outlet Pressure (Bar)
% Efficient
100
99
98
97
96
95
94
93
92
91
90
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
C081 Volumetric Efficiency
C081 Overall Efficiency
C081 Input Power
C081 Mechanical Efficiency
Testing completed using ISO VG68 fluid at 90°C 18 cc charge pump
with 22 bar pressure setting
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
10
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Efficiency Information C136
1000 RPM
1600 RPM
2200 RPM
Pump Outlet Pressure (Bar)
Kw
200
180
160
140
120
100
80
60
40
20
0
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
Pump Outlet Pressure (Bar)
% Efficient
100
95
90
85
80
75
70
65
60
100 150 200 250 300 350
Pump Outlet Pressure (Bar)
% Efficient
100
95
90
85
80
75
70
65
60
100 150 200 250 300 350
1000 RPM
1600 RPM
2200 RPM
1000 RPM
1600 RPM
2200 RPM
Pump Outlet Pressure (Bar)
% Efficient
100 150 200 250 300 350
100
99
98
97
96
95
94
93
92
91
90
C136 Volumetric Efficiency
C136 Overall Efficiency
C136 Input Power
C136 Mechanical Efficiency
Testing completed using ISO VG68 fluid at 90°C 23 cc charge pump
with 22 bar pressure setting
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
11
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Manual Lever Control With Feedback – A
Pump displacement is directly proportional to the lever’s
rotation angle. Based on swash-plate position, the
feedback system works automatically to compensate
for positioning errors. Refer to diagrams for relationship
between angle and displacement.
Controls
C055 Lever Angle vs. Displacement
C081 Lever Angle vs. Displacement
Angle (°)
Displacement (%)
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
GS GA
V2
T
V4
V1
PS
Z1
R1
R2
V3
X2 X1 PL1
L2
L3
GT
Z2
A
B
FA1 GB
FA
Current (mA)
Displacement (%)
G
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
F
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
24V
12V
D
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
C
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
A
Angle (°)
Displacement (%)
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
12
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
C136 Lever Angle vs. Displacement
Angle (°)
Displacement (%)
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
X1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
Lever Detail
Ø0.315 in [Ø8 mm]
2.36 in [60 mm]
40°
40°
NOTE:
The spring return feature in the control unit is not a
safety device. Internal contamination (contaminated
hydraulic uid, abrasion or residual contamination from
system components) can cause the spool valve inside
the control unit to get stuck in an undened position. As
a result, the axial piston unit will no longer supply the
specied ow. Check which remedial measures should
taken on your machine in order to bring the driver
consumer into a safe position (e.g. immediate stop).
Lever width = .75 in [20 mm]
Lever thickness = .16 in [4 mm]
The torque necessary at the control lever is between 1 and 2.45 Nm
[0.737 and 1.80 lbf·ft].
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
13
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Hydraulic Proportional Control
With Feedback – C
Pump displacement and ow direction are proportional
to the pilot pressure on Y1 or Y2 ports. Based on
swash-plate position, the feedback system works
automatically to compensate for positioning errors.
Piloting can be provided by boost pressure from the GS
port. The piloting pressure must then be controlled by a
joystick or pressure-reducing valve (not supplied).
Controls
C055 Pilot Pressure vs. Displacement
C081 Pilot Pressure vs. Displacement
Pilot pressure = 6÷18 bar [87÷261 psi] (at ports Y1, Y2)
Start of control = 6 bar [87 psi]
End of control = 18 bar [261 psi] (Max displacement)
Pilot pressure = 6÷18 bar [87÷261 psi] (at ports Y1, Y2)
Start of control = 6 bar [87 psi]
End of control = 18 bar [261 psi] (Max displacement)
Pressure Bar [psi]
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
GS GA
V2
T
V4
V1
PS
Y1
Z1
Y2
R1 R2
V3
X2 X1
PL1
L2
L3 GT
Z2
A
B
FA1 GB
FA
Current (mA)
Displacement (%)
G
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
F
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
24V
12V
D
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
C
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
A
Angle (°)
Displacement (%)
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
14
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
C136 Pilot Pressure vs. Displacement
Pressure Bar [psi]
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
GS GA
V2
T
V4
V1
PS
Y1
Z2
Y2
R1
R2
V3
X1
X2
S
Z1a
Z2a
L1
L2
L3
GT
Z1
A
B
FA1 GB
FA2
NOTE:
The tolerance on piloting pressure is ± 10% of
maximum value.
The spring return feature in the control unit is not a
safety device. Internal contamination (contaminated
hydraulic uid, abrasion or residual contamination from
system components) can cause the spool valve inside
the control unit to get stuck in an undened position. As
a result, the axial piston unit will no longer supply the
specied ow. Check which remedial measures should
taken on your machine in order to bring the driver
consumer into a safe position (e.g. immediate stop).
Control Response Time
Orice dimension
Vg min→Vg max
300 bar [4350 psi]
Vg max→Vg min
300 bar [4350 psi]
Ø 0.5 mm
[Ø 0.019 in]
3.6 sec. 6.5 sec.
Ø 0.7 mm (*)
[Ø 0.027 in] (*)
2 sec. 3.1 sec.
Ø 0.8 mm (**)
[Ø 0.031 in] (**)
1.7 sec. 2.7 sec.
Ø 0.9 mm
[Ø 0.035 in]
1.6 sec. 2.2 sec.
Values obtained with oil temperature 45°÷47°C and pump temperature of
50°÷ 55°C – oil ISO Vg 46.
(*) STANDARD with override valves
(**) STANDARD without override valves, Note: Used on C081 only
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
15
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Hydraulic Proportional Control Without
Feedback – D
Pump displacement and ow direction are proportional
to the pilot pressure on Y1 or Y2 ports. Working
pressure and rotation speed also inuence ow. With
a given input signal (piloting pressure), the pump can
vary displacement and ow when working pressure or
rotating speed change. Feeding pressure to the control
joystick can be provided by charge pressure from the
GS port. The piloting pressure must then be controlled
by said joystick or by a pressure-reducing valve (not
supplied). The orice dimensions must correlate with
required response times. See next page for table.
Controls
C081 Pilot Pressure vs. Displacement
C055 Pilot Pressure vs. Displacement
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
Pilot pressure = 6÷14 bar [87÷203 psi] (at ports Y1, Y2)
Maximum pilot pressure = 30 bar [435 psi]
Start of control = 6 bar [87 psi]
End of control = 14 bar [203 psi] (Max displacement)
Nominal output shown. Actual output will vary depending on input speed
and system pressures.
GS GA
V2
V4
V1
PS
Y1
Z1
Y2
R1 R2
V3
X2 X1 PL1
L2
L3
GT
Z2
A
B
FA1 GB
FA
Current (mA)
Displacement (%)
G
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
F
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
24V
12V
D
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
C
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
A
Angle (°)
Displacement (%)
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
16
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
C136 Pilot Pressure vs. Displacement
Pilot pressure = 6÷14 bar [87÷203 psi] (at ports Y1, Y2)
Maximum pilot pressure = 30 bar [435 psi]
Start of control = 6 bar [87 psi]
End of control = 14 bar [203 psi] (Max displacement)
NOTE:
The tolerance on piloting pressure is ± 10% of
maximum value.
WARNING:
Use of the D control can require a review of the
motor engine and vehicle parameters to ensure that
the pump is set up correctly. We recommend that
applications be reviewed by a Parker technician.
Pressure Bar [psi]
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
X1
Y2 Y1
PS
R1 R2
V4
V3
Z1a
Z2 Z1 SL1L3GT
FA2
FA1
B
V2
GS GA
A
L2
Z2a
X2
Control Response Time
Orice dimension
Vg min→Vg max
300 bar [4350 psi]
Vg max→Vg min
300 bar [4350 psi]
Ø 0.5 mm
[Ø 0.019 in]
3.6 sec. 6.5 sec.
Ø 0.7 mm (*)
[Ø 0.027 in] (*)
2 sec. 3.1 sec.
Ø 0.8 mm (**)
[Ø 0.031 in] (**)
1.7 sec. 2.7 sec.
Ø 0.9 mm
[Ø 0.035 in]
1.6 sec. 2.2 sec.
Values obtained with oil temperature 45°÷47°C and pump temperature of
50°÷55°C – oil ISO Vg 46.
(*) STANDARD with override valves
(**) STANDARD without override valves, Note: Used on C081 only
Nominal output shown. Actual output will vary depending on input speed
and system pressures.
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
17
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Electric Non-Proportional – E
By turning on one of the on-off solenoids (standard
24V d.c. optional 12V d.c.), the pump swivels to
maximum displacement in the corresponding output
ow direction. Turning off the solenoid results in
swiveling the pump back to zero displacement position.
Controls
PS
V1
V4
R2
R1
Z1
Z2
P
L1
L2
L3
GT
FA
FA1
GB
B
V2
A
GS GA
V3
X2 X1
C055 C081
X1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
C136
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
18
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
NOTE:
The tolerance on control coil amperage is ± 10% of
maximum value.
30 Watt coils
12 VDC coil resistance of 18.8 ohms
24 VDC coil resistance of 18.8 ohms
The spring return feature in the control unit is not a
safety device. Internal contamination (contaminated
hydraulic uid, abrasion or residual contamination from
system components) can cause the spool valve inside
the control unit to get stuck in an undened position.
As a result, the axial piston unit will no longer supply
the specied ow. Check which remedial measures
should taken on your machine in order to bring the driver
consumer into a safe position (e.g. immediate stop).
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
19
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Electric Proportional Control With
Feedback – F
Pump displacement is directly proportional to the input
current of one of the two proportional solenoids. Based
on swash-plate position, the feedback system works
automatically to compensate for positioning errors.
The input current of the two proportional solenoids
must be controlled by an external amplier card. The
Parker IQAN family of controllers is suggested for use.
Flow direction depends on which solenoid is energized.
Standard solenoids are proportional at 24V d.c. max.
current 1A. (Optional solenoids 12Vmd.c. max. current
2A). However, for emergency operation only, it is possible
to control solenoids directly with 24V d.c. voltage (or
12V d.c.), bypassing the amplier.
Controls
C055 Amperage vs. Displacement
Current (mA)
Displacement (%)
G
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
F
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
24V
12V
D
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
C
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
A
Angle (°)
Displacement (%)
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
20
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
GS GA
V2
V4
V1
PS
Z1
R1
R2
V3
X2 X1 PL1
L2
L3 GT
Z2
A
B
FA1 GB
FA
C081 Amperage vs. Displacement
Current (mA)
Displacement (%)
12V
12V
24V
24V
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
C136 Amperage vs. Displacement
Solenoid 24V: Current min. 200 mA max 600 mA
Solenoid 12V: Current min. 400 mA max 1200 mA
PWM frequency: 110 Hz
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
12V
24V
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
X1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
Solenoid 24V: Current min. 200 mA max 600 mA
Solenoid 12V: Current min. 400 mA max 1200 mA
PWM frequency: 110 Hz
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
21
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
NOTE:
The tolerance on control coil amperage is ± 10% of
maximum value.
The spring return feature in the control unit is not a
safety device. Internal contamination (contaminated
hydraulic uid, abrasion or residual contamination from
system components) can cause the spool valve inside
the control unit to get stuck in an undened position.
As a result, the axial piston unit will no longer supply
the specied ow. Check which remedial measures
should taken on your machine in order to bring the driver
consumer into a safe position (e.g. immediate stop).
C055 and C081 Step Response Chart
Orice size 0.6 mm 0.7 mm 0.8* mm 1.2 mm None
0 to full ow 5.87 4.48 4.27 3.09 2.88
Full to 0 ow 3.52 2.99 2.56 1.17 0.96
Time in seconds
*Standard orifice
Fluid viscosity = 50 cSt
Input speed = 1500
250 bar (3600 PSI) working pressure
22 bar (320 PSI) charge pressure
C136 Step Response Chart
Orice size 0.6 mm 0.7 mm 0.8* mm 1.2 mm None
0 to full ow 8.22 6.40 5.44 3.63 3.20
Full to 0 ow 4.69 3.63 2.88 1.60 1.07
Controls
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
22
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Electric Proportional Control Without
Feedback – G
Pump displacement is directly proportional to the
input current of the two proportional solenoids. Flow is
also inuenced by the working pressure and rotation
speed of the pump. With a given input signal (piloting
current), the pump can vary the displacement and ow
when working pressure or rotating speed change. The
input current of the two proportional solenoids must
be controlled by an external amplier card. The Parker
IQAN family of controllers is suggested for use.
Flow direction depends on which solenoid is energized.
Standard solenoids are proportional 24V d.c. max.
current 1A. (Optional solenoids 12V d.c. max. current
2A). However, for emergency operation only, it is
possible to control solenoids directly with 24V d.c.
voltage (or 12V d.c.), bypassing the amplier.
We do suggest a 100 Hz PWM be applied to the coils
on the Series 2 “G” control and have found that a
PWM up to 150 Hz gives a very good response.
Controls
C055 Amperage vs. Displacement
Current (mA)
Displacement (%)
G
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
F
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
24V
12V
D
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
C
Pressure Bar (psi)
Displacement (%)
-100 -80 -60 -40 -20 0 20 40 60 80 100
20
16
12
8
4
-4
-8
-12
-16
-20
[290]
[232]
[174]
[116]
[58]
0
[-58]
[-116]
[-174]
[-232]
[-290]
A
Angle (°)
Displacement (%)
40
30
20
10
0
-10
-20
-30
-40
-100 -80 -60 -40 -20 0 20 40 60 80 100
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
23
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
C081 Amperage vs. Displacement
Current (mA)
Displacement (%)
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
GS GA
V2
V4
V1
PS
Z1
R1 R2
V3
X2 X1
PL1
L2
L3 GT
Z2
A
B
FA1 GB
FA
Solenoid 24V: Current min. 300 mA max 650 mA
Solenoid 12V: Current min. 600 mA max 1300 mA
PWM frequency: 110 Hz
Nominal output shown. Actual output will vary depending on
input speed and system pressures.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
24
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
C136 Amperage vs. Displacement
Solenoid 24V: Current min. 300 mA max 650 mA
Solenoid 12V: Current min. 600 mA max 1300 mA
PWM frequency: 110 Hz
Current (mA)
Displacement (%)
1400
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-1400
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
12V
24V
24V
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
X1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA 2
FA 1
GB
B
V2
A
GS GA
V3
Z2a
NOTE:
The tolerance on control coil amperage is ± 10% of
maximum value.
WARNING:
Use of the G control can require a review of the
engine and vehicle parameters to ensure that the
pump is set up correctly. We recommend that
applications be reviewed by a Parker technician.
Nominal output shown. Actual output will vary depending on
input speed and system pressures.
Controls
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
25
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Electric Proportional Control With
Hydraulic Override – H
This control has the same electric proportional features
as the F control, as well as emergency hydraulic
proportional control capability for pilot pressure on Y1
and Y2 ports. The input current of the two proportional
solenoids must be controlled by an external amplier
card. The Parker IQAN family of controls is suggested
for use.
Hydraulic operation of the H control is designed to be
an emergency device to control displacement of the
pump in case of a breakdown of the electric circuit it
is not intended as the primary control of pump
displacement. A pilot pressure of 22 bar (319 psi) is
required to swivel the pump to maximum displacement
in emergency operation.
Controls
C055 Amperage vs. Displacement
Current (mA)
Displacement (%)
12V
24V
12V
24V
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
3.35 in
3
/rev [55 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
26
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
C081 Amperage vs. Displacement
C136 Amperage vs. Displacement
X1
Y2
S1
Y1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
GS GA
V2
V4
V1
PS
Y1
Z1
Y2
S1
R1
R2
V3
X2 X1
PL1
L2
L3 GT
Z2
A
B
FA1 GB
FA
Current (mA)
Displacement (%)
12V
12V
24V
24V
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
4.94 in
3
/rev [81 cm
3
/rev]
Current (mA)
Displacement (%)
1200
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
-1200
-100 -80 -60 -40 -20 0 20 40 60 80 100
12V
24V
12V
24V
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
8.29 in
3
/rev [136 cm
3
/rev]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
27
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
NOTE:
The tolerance on control coil amperage is ± 10% of
maximum value.
The spring return feature in the control unit is not a
safety device. Internal contamination (contaminated
hydraulic uid, abrasion or residual contamination from
system components) can cause the spool valve inside
the control unit to get stuck in an undened position.
As a result, the axial piston unit will no longer supply
the specied ow. Check which remedial measures
should taken on your machine in order to bring the driver
consumer into a safe position (e.g. immediate stop).
WARNING:
Y1 and Y2 ports must not have any back pressure
during normal electric control operation (vented
to tank).
C055 and C081 Step Response Chart
Orice size 0.6 mm 0.7 mm 0.8* mm 1.2 mm None
0 to full ow 5.87 4.48 4.27 3.09 2.88
Full to 0 ow 3.52 2.99 2.56 1.17 0.96
Time in seconds
*Standard orifice
Fluid viscosity = 50 cSt
Input speed = 1500
250 bar (3600 PSI) working pressure
22 bar (320 PSI) charge pressure
C136 Step Response Chart
Orice size 0.6 mm 0.7 mm 0.8* mm 1.2 mm None
0 to full ow 8.22 6.40 5.44 3.63 3.20
Full to 0 ow 4.69 3.63 2.88 1.60 1.07
Direction of Rotation
Correlation between direction of rotation (shaft view) control
and direction of ow.
L (CCW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
28
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Automotive – J/K
The automotive control is primarily used in propel
applications where a transmission needs to act similar to
automotive vehicles with automatic transmissions where
an operator selects direction of travel and then controls
the prime mover rpm to control vehicle travel speed.
Output ow direction is determined by a directional
control valve command either an electrical (J) or
hydraulic (K) signal. Pump displacement is controlled by
an internal pilot signal which will increase or decrease
depending on input RPM and generate output ow into
the circuit in the direction commanded by the directional
control valve.
System ow will be affected by increases or decreases in
system pressure in addition to any change in input RPM.
Control is also available with a hydraulic inching valve
which will act to keep the pump from producing ow
when the inching valve is activated. This valve will allow
for high engine speeds and ensure that the pump does
not produce any system ow if an auxiliary function
requires more input speed. Minimum Pressure for the
inching valve to function is 12 bar (175 PSI).
Controls
X2 X1
PS
VC
VS
VT
T
T1
In
Pi Gas
Pi UNF
V1
V4
R2
R1
Z1
Y1
Y2
J
K
Z2
St
L1
L2
L3 GT
FA
FA1GB
B
V2
A
GS GA
V3
P
C081 Electric (J) / Hydraulic (K) Automotive With
Hydraulic Inching + Flushing Valve
C055 Electric (J) / Hydraulic (K) Automotive With
Hydraulic Inching + Flushing Valve
Units with this control also have the option for having
a ushing valve mounted onto the pump.
This control is naturally speed and torque sensitive
so your Parker representative will need to know more
information on the prime mover driving the pump to
ensure it is properly applied.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
29
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Controls
C136 Electric (J) / Hydraulic (K) Automotive
With Hydraulic Inching + Flushing Valve
X2 X1
PS
VC
VS
VT
T
T1
In
Pi Gas
Pi UNF
V4
R2
R1
Z1
Y1
Y2
J
K
Z2
St
L1
L2
L3 GT
FA2
FA1GB
B
V2
A
GS
GA
S
Direction of Rotation (J/K)
Correlation between direction of rotation (shaft view) control and direction of ow.
NOTE:
The tolerance on control coil amperage is ± 10% of
maximum value.
J Coil Information:
30 Watt coils
12VDC coil resistance of 4.8 ohms
24 VDC coil resistance of 18.8 ohms
The spring return feature in the control unit is not a
safety device. Internal contamination (contaminated
hydraulic uid, abrasion or residual contamination from
system components) can cause the spool valve inside
the control unit to get stuck in an undened position.
As a result, the axial piston unit will no longer supply
the specied ow. Check which remedial measures
should taken on your machine in order to bring the driver
consumer into a safe position (e.g. immediate stop).
K control requires a pilot pressure of 22 Bar (319 PSI)
to shift spool.
A
B
Y1
Y2
A
B
S1
S2
A
B
Y1
Y2
A
B
S1
S2
L (CCW) Rotation
L (CCW) Rotation
R (CW) Rotation
R (CW) Rotation
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
30
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Fan Drive Control – R
Parker’s R control is specically designed for hydraulic
fan drive applications. The hydraulic fan drive control
is a non-feedback electrically operated control.
The pump displacement is directly proportional to the
input current on the solenoid. Flow is also inuenced by
the working pressure and rotation speed. With a given
input signal, the pump can vary displacement and ow
due to working pressure and speed rotation variation.
Input current must be controlled by an external
amplier. Flow direction depends on the pump’s
direction of rotation and on the input current.
C055 R Control/Type P OverrideFan Drive Control Functional Diagram
%Vg max
% I max
100
80
60
40
20
0
-20
-40
-60
-80
-100
0 10 20 30 40 50 60 70 80 90 100
Controls
C055 R** control/ type P override
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
31
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
C081 R Control/Type P Override
C136 R Control/Type P Override
A
B
X1
X2
Z1 Z2
Z2a
Z1a
S
L1
L2
L3 GT
FA2
FA1
GB
GS GAPS
R1
R2
V4
V3
V1
V5
V2
C136 R** control/ type P override
Controls
A
B
X1
X2
Z1 Z2
Z2a
Z1a
S
L1
L2
L3 GT
FA2
FA1
GB
GS GAPS
R1
R2
V4
V3
V1
V5
V2
C136 R** control/ type P override
A
B
X1
X2
Z1 Z2
Z2a
Z1a
S
L1
L2
L3 GT
FA2
FA1
GB
GS GAPS
R1
R2
V4
V3
V1
V2
V5
C081 R** control/ type P override
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
32
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
X1
X2
PS
V1
V4
R2
R1
Z1a
Z2 Z1
S
L1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
GS GA
V2
V4
V1
PS
Z1
S2
R1 R2
V3
X2 X1 PL1
L2
L3 GT
Z2
A
B
FA1 GB
FA
Pressure Override – P
The pressure override valve is designed to avoid
opening relief valves. When working pressure reaches
the P valve setting, the swash plate swivels back and
reduces ow. The valve maintains a constant pressure
in the circuit at the setting value. It is advisable to t
the cut-off valve to all systems where pressure peaks
Pressure Override Options
C055 With Type P Pressure Override
C081 With Type P Pressure Override
C136 With Type P Pressure Override
Note:
The electric override valve can be assembled on standard
C pumps and combined with pressure override valves.
close to the relief valve’s setting, or in hydraulic systems
engineered to maximum pump pressure. The pressure
override should be set 20 – 30 bar (290 – 435 psi) lower
than the cross port relief valve setting. Setting range:
100 – 420 bar (1,450 – 6,090 psi)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
33
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
C136 With Type P Pressure Override
GS GA
V2
V4
V1
PS
Z1
S2
R1 R2
V3
X2 X1 PL1
L2
L3 GT
Z2
A
B
FA1 GB
FA
X1
S1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
S
L1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
Electric Cut-Off Valve – E
The electric cut-off valve, directly connected to the
C pump housing, swivels pump ow back to zero
when power supply to the on/off solenoid is cut off.
Pressure Override Options
C081 With Type E Override C136 With Type E Override
This valve is designed for applications subject to safety
regulations, which require stopping the machine in
case of no electric signal. Feed voltage is 24V d.c.
(optional 12V d.c.).
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
34
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Pressure Override Options
Electrical Cut-Off Valve and Pressure
The C option override is a combination of the P and
E override options. P and E override option details for
operation information.
C081 With Type C Override C136 With Type C Override
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
35
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Charge Filtration Options
To guarantee an optimum uid contamination level in
the closed loop, the C pump can be equipped with
a lter. It is positioned on the delivery outlet of the
charge pump. The lter contains a composite-ber
Charge Filtration Options
C055 With Charge Filter Option
C081 With Charge Filter Option
ltering element. Electrical (connector DIN 43650) and
mechanical lter clogging sensors (standard 8 bar/116
psi) are available. It’s possible to combine the lter with
cut-off valves.
Mechanical Sensor
Mechanical Sensor
Electrical Sensor
Electrical Sensor
GS GA
V2
V4
V1
PS
Z1
S1
R1
R2
V3
X2 X1
PL1
L2
L3
GT
Z2
A
B
FA1 GB
FA
GS GA
V2
V4
V1
PS
1 N.A.
2 N.C.
3
Z1
S1
R1
R2
V3
X2 X1
PL1
L2
L3
GT
Z2
A
B
FA1 GB
FA
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
36
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Charge Filtration Options
C136 With Charge Filter Option
Mechanical Sensor Electrical Sensor
SPDT Max Resistive Load Max Inductive Load
C.A.\ A.C. 125-250 V 1A 1 A
C.C.\ D.C. 30 V 2 A 2 A
C.C.\ D.C. 50 V 0,5 A 0,5 A
C.C.\ D.C. 75 V 0,25 A 0,25 A
C.C.\ D.C. 125 V 0,2 A 0,03 A
X1
S1
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
X1
S1
3
1 N.A.
2 N.C.
X2
PS
V1
V4
R2R1
Z1a
Z2 Z1
SL1
L2
L3 GT
FA2
FA1
GB
B
V2
A
GS GA
V3
Z2a
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
37
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Charge Filtration Options
C055 With Remote Charge Filtration
C081 With Remote Charge Filtration
C136 With Remote Charge Filtration
X2 PS
V4
R2
R1
V1
V3
V2
IN
OUT
GS
GA
X1
Z1a
Z1 Z2 SL1L2L3GTFA2 FA
1G
B
B
A
Z2a
X1 PS
V4
R2
R1
V1
V3
V5
V2
IN
OUT
GS
GA
X2
Z1a
Z2 Z1 SL1L2L3GTFA2 FA1GB
B
A
Z2a
X2 PS
V4
R2
R1
V1
V3
V2
IN
OUT
GS
GA
X1
Z1a
Z1 Z2 SL1L2L3GTFA2 FA1GB
B
A
Z2a
X1 PS
V4
R2
R1
V1
V3
V5
V2
IN
OUT
GS
GA
X2
Z1a
Z2 Z1 SL1L2L3GTFA2 FA
1G
B
B
A
Z2a
Remote Charge Filtration – R
Valve block supplied on the pumps with ports for
connecting a customer supplied remotely mounted
hydraulic lter.
Do not operate units without filter connected to IN and OUT ports
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
38
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Bypass Valve
The bypass valve allows the connection of
pressure port lines A and B. To open the valve,
unlock the locking nut and turn the screw six turns
counterclockwise. The bypass valve is intended for
use at low vehicle speeds. Moving at high speeds
may cause damage to transmission components
and cause an excess of heat generation.
Charge Filtration Options
C055
C081
GS GA
V2
V4
V1
PS
Z1
T
R1
R2
V3
X2 X1
PL1
L2
L3
GT
Z2
A
B
FA1 GB
FA
BYPASS
9.52 in [241.9 mm]
2.72 in
[69 mm]
2.62 in
[66.5 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
39
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
A Control
C055 Port Chart
Port Mount C Mount G
A 1" SAE CODE 62
B 1" SAE CODE 62
L1 -12 SAE ORB 3/4" G
L2 -12 SAE ORB 3/4" G
FA -16 SAE ORB 1" G
GA -4 SAE ORB 1/4" G
GB -4 SAE ORB 1/4" G
C055 Port Chart
Port Mount C Mount G
GS -4 SAE ORB 1/4" G
PS -4 SAE ORB 1/4" G
X1 3/8" G 3/8" G
X2 3/8" G 3/8" G
Z1 1/8" G 1/8" G
Z2 1/8" G 1/8" G
S -4 SAE ORB 1/4" G
8.80 in [223.5 mm]
1.09 in [27.8 mm]
4.69 in [119.2 mm]
4.17 in [105.9 mm]
4.84 in [123 mm]
3.66 in [93 mm]
0.50 in [12.7 mm]
8.80 in [223.5 mm]
3.66 in [93 mm]
2.32 in [59 mm]
L2
GA
7/16 14UNC-2B SAE
M12 ISO
depth 20 mm
X1 L1
Z1
S
PS
GB
X2
Z2
GA
GS
FA
A
B
8.17 in [207.6 mm]
0.79 in [20 mm]
2.56 in [65 mm]
11.20 in [284.5 mm]
9.51 in [241.5 mm]
0.43 in [11 mm]
2.56 in [65 mm]
0.79 in
[20 mm]
7.13 in [181 mm]
1.73 in [44 mm]
4.51 in [114.5 mm]
0.69 in [17.5 mm] nº2 0.56 in [14.3 mm] nº4
4.51 in [114.5 mm]
2.25 in [57.2 mm]
1.73 in [44 mm]
6.54 in [166.2 mm]
3.62 in
[92 mm]
3.40 in
[86.3 mm]
8.35 in [212 mm]
1.87 in [47.5 mm]
2.18 in [55.4 mm]
8.66 in [220 mm]
2.32 in
[59 mm]
6.58 in [167.2 mm]
2.99 in
[76 mm]
0.16 in [4 mm]
5.00 in [o127 mm]
o0.31 in [o8 mm]
o1.02 in [o26 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
40
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
C Control
D Control
2.22 in [56.5 mm]
4.93 in [125.3 mm]
4.93 in [125.3 mm]
2.22 in [56.5 mm]
5.52 in [140.2 mm]
6.26 in [159.1 mm]
Y1
Y2
2.89 in [73.5 mm]
Y2
Y1
6.43 in [163.2 mm]
5.02 in [127.5 mm]
5.39 in [137 mm]
4.76 in [121 mm]
4.76 in [121 mm]
Y1-Y2: Control piloting pressure ports – 1/4"G (BSPP) (ISO)
7/16" – 20 UNF 2B (SAE)
Y1-Y2: Control piloting pressure ports – 1/4"G (BSPP) (ISO)
7/16" – 20 UNF 2B (SAE)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
41
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
F Control
E Control
8.10 in [205.8 mm]
5.52 in [140.2 mm]
6.73 in [171 mm]
Connector DT04
6.39 in [162.4 mm]
5.95 in [151.2 mm]
6.39 in [162.4 mm]
5.06 in [128.5 mm]
7.41 in [188.3 mm]
Connector DIN 43650 (ISO4400)
5.08 in [129 mm]
5.08 in [129 mm]
6.87 in [174.4 mm]
7.30 in [185.5 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
42
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
H Control
G Control
8.39 in [213 mm]
7.20 in [183 mm]
4.87 in
[123.8 mm]
5.83 in
[148 mm]
Connector DIN 43650 (ISO4400)
5.53 in [140.5 mm]
9.52 in [241.8 mm]
6.85 in [174 mm]
5.52 in [140.2 mm]
6.40 in [162.6 mm]
Connector
DT04
8.15 in [207 mm]
3.74 in [95 mm]
Y2
Y1
Y1-Y2: Control piloting pressure ports – 1/8"G (BSPP) (ISO)
5/16" – 24 UNF 2B (SAE)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
43
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
Shaft
2: Splined SAE 1 - 3/8" 21T 16/32 Dp – Flat Root Class 5 ANSI B92.1a – 1976
1: Splined SAE 1 - 1/4" 14T 12/24 Dp – Flat Root Class 5 ANSI B92.1a – 1976
2.2 in [55.9 mm]
1.89 in [48 mm]
1.55 in [39.3 mm]
o1.228 in
[o31.2 mm]
2.2 in [55.9 mm]
1.89 in [48 mm]
1.58 in [40.2 mm]
o1.338 in
[o34 mm]
2.2 in [55.9 mm]
1.89 in [48 mm]
1.55 in [39.3 mm]
o1.228 in
[o31.2 mm]
2.2 in [55.9 mm]
1.89 in [48 mm]
1.58 in [40.2 mm]
o1.338 in
[o34 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
44
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
Through Drives
The C pump can be supplied with a through drive,
which can operate in tandem with a second pump.
Available anges include SAE A, SAE B, SAE C, SAE
B-B and SAE C-C anges.
Maximum permissible drive-shaft torques for the rst
pump, as well as maximum through drive torques are
listed in the table below.
WARNING:
The effective torque value on the shaft of first pump
is given by the sum of the torques required from
each pump making the system.
Size 055
Drive shaft
2
Z21 16/32 DP
1
Z14 12/24 DP
Drive shaft max torque Nm [lbf·ft] 950 (700) 620 (457)
Through drive max torque Nm [lbf·ft] 665 (490) 620 (457)
C055 Tandem for Reference
20.31 in [516 mm]
8.8 in [223.5 mm]
22.72 in [577 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
45
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C055
Through Drive Option A
Through Drive Option B
Through Drive Option C
6.76 in [171.7 mm]
0.55 in [14 mm]
1.22 in [31 mm]
7.13 in [181 mm]
5.00 in [127 mm]
4.51 in [114.5 mm]
4.51 in [114.5 mm]
3º
3º
11.52 in [292.5 mm]
Splined
SAE C 1-1/4 14T 12/24DP
OR 3.53x126.6 (2-250)
(ISO) Holes M16x2; 30 (1.18) Deep
(SAE) Holes 5/8 11UNC-2B; 30 (1.18) Deep
(ISO) M12x1.75; 30 (1.18) Deep
(SAE) 1/2 13UNC-2B; 30 (1.18) Deep
11.67 in [296.5 mm]
6.76 in [171.7 mm]
5.75 in
[146 mm]
0.67 in [17.1 mm]
1.38 in [35 mm]
(ISO) Holes M12x1.75; 19 (0.75) Deep
(SAE) Holes 1/2 13UNC-2B; 19 (0.75) Deep
4.00 in [o101.6 mm]
Splined
SAE B 7/8 13T 16/32 DP
SAE B-B 1 15T 16/32 DP
OR 2.62x101.27 (2-155)
11.67 in [296.5 mm]
0.57 in [14.5 mm]
1.38 in [35 mm]
4.19 in
[106.4 mm]
(SAE) Holes 3/8 16UNC-2B; 17 (0.67) Deep
(ISO) Holes M10x1.5; 16 (0.63) Deep
Splined
SAE A 5/8 9T 16/32 DP
OR 2.62x82.22 (2-152)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
46
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
A Control
Displacement setting
2.83 in [71.9 mm]
1.42 in [36.1 mm ]
2.251 in [57.2 mm]
0.98 in [25 mm]
Depth 20 mm
1.094 in [27.8 mm]
2.74 in [69.6 mm]
3.44 in [87.4 mm]
3.49 in [88.6 mm]
8.77 in [222.7 mm]
9.12 in [231.6 mm]
M12
7/16-14 UNC-2B
3.3 in [83.9 mm]
2.83 in [71.9 mm]
1.18 in [30 mm]
0.413 in [10.5 mm]
12.76 in [324.1 mm]
11.37 in [288.7 mm]
6.4 in [162.6 mm]
4.93 in [125.3 mm]
4.81 in [122.3 mm]
6.27 in [159.3 mm]
5.63 in [143.1 mm]
8.35 in [212 mm]
7.125 in [181 mm]
4.512 in [114 mm]
1.42 in [36.1 mm]
4.69 in [119 mm] 4.69 in [119 mm]
0.71 in [18 mm]
5.85 in [148.7 mm]
0.85 in [21.7 mm]
0.59 in [15 mm]
4.512 in [114.6 mm]
6.72 inm [170.8 mm]
5.18 in [131.6 mm]
1.41 in [35.8 mm]
4.17 in [105.8 mm]
1.33 in [33.8 mm]
8.4 in [212.6 mm]
4.8 in [122.6 mm]
1.4 in [36.1 mm]
6.22 in [158 mm]
3.21 in [81.6 mm]
Ø5 in [Ø127 mm]
0.97 in [24.5 mm]
X2
B
S
Z2
A
GA
L2
L3
V1
FA2
GT
PS
X1
L1
Z1
Z2
FA1
GB
GS
A
B
C081 Port Chart
Port Mount C Mount G
A 1" SAE CODE 62 1" SAE CODE 62
B 1" SAE CODE 62 1" SAE CODE 62
L1 -12 SAE ORB 3/4" G
L2 -12 SAE ORB 3/4" G
FA1 -16 SAE ORB 1" G
FA2 -16 SAE ORB 1" G
GA -4 SAE ORB 1/4" G
GB -4 SAE ORB 1/4" G
GS -4 SAE ORB 1/4" G
C081 Port Chart
Port Mount C Mount G
PS -4 SAE ORB 1/4" G
Z1 -4 SAE ORB 1/8" G
Z2 -4 SAE ORB 1/8" G
X1 3/8" G 3/8" G
X2 3/8" G 3/8" G
Y1 -4 SAE ORB 1/4" G
Y2 -4 SAE ORB 1/4" G
S -4 SAE ORB 1/4" G
GT -4 SAE ORB 1/4" G
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
47
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Y1-Y2: Control piloting pressure ports – 1/4 G (BSPP)
7/16-20 UNF-2B (SAE)
S1-V1: Adjustable throttle valve
Dimensions C081
C Control
Y1-Y2: Control piloting pressure ports - 1/4 G (BSPP)
7/16-20 UNF-2B (SAE)
V1: Adjustable throttle valve
D Control
5.4 in [137.3 mm]
14.72 in [120 mm]
2.2 in [56 mm]
4.89 in [124.1 mm]
4.89 in [124.1 mm]
5.41 in [137.6 mm]
Y2 Y1
V1
2.07 in [52.5 mm]
4.89 in [124.3 mm]
4.89 in [124.3 mm]
2.07 in [52.5 mm]
5.61 in [142.6 mm]
6.22 in [157.9 mm]
Y2
Y1
V1
Y1-Y2: Control piloting pressure ports - 1/4 G (BSPP)
7/16-20 UNF-2B (SAE)
S1-V1: Adjustable throttle valve
D Control With Cut-Off Valves
2.2 in [56 mm]
6.12 in [155.6 mm]
4.82 in [122.6 mm]
5.42 in [137.6 mm]
4.89 in [124.1 mm]
4.89 in [124.1 mm]
Y1
V1
Y2
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
48
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
V1: Adjustable throttle valve
F Control
V1: Adjustable throttle valve
E Control
6.22 in [158 mm]
Connector DIN43650 (ISO4400)
V1
4.69 in [119.2 mm]
4.89 in [124.1 mm]
4.89 in [124.1 mm]
6.62 in [168.2 mm]
7.07 in [179.6 mm]
5.99 in [152.1 mm]
5.99 in [152.1 mm]
8.03 in [204 mm]
5.205 in [132.2 mm]
Connector Deutsch DT04-2P
V1
5.61 in [142.6 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
49
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
V1: Adjustable throttle valve
Dimensions C081
H Control
6.68 in [169.7 mm]
5.59 in [142.1 mm]
4.69 in [119 mm]
1.81 in [46 mm] 1.81 in [46 mm]
3 in [76.1 mm]3 in [76.1 mm]
4.69 in [119 mm]
V1
Connector Deutsch DT04-2P
Y2
S1
Y1
V1: Adjustable throttle valve
G Control
6.73 in [171 mm]
5.41 in [137.3 mm]
4.7 in [119.3 mm]
4.76 in [121 mm]
5.83 in [148.1 mm]
5.83 in [148.1 mm]
Connector DIN43650 (ISO4400)
V1
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
50
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Automotive J With Hydraulic Inching
11.78 in [299.1 mm]
4.59 in [116.5 mm]
3.72 in [94.5 mm]
4.07 in [103.5 mm]
0.51 in [13 mm]
0.77 in [19.5 mm]
1.73 in [44 mm]
6.11 in [155.1 mm]
3.88 in [98.5 mm]
12.6 in [320.1 mm]
4.83 in [122.8 mm]
3.92 in [99.5 mm]
4.53 in [115 mm]
0.98 in [25 mm]
6.36 in [161.6 mm]
5.97 in [151.6 mm]
5.89 in [149.5 mm]
6.52 in [165.5 mm]
4.17 in [106 mm]
Connector DIN43650 (ISO4400)
In
T
Pi UNF
Pi Gas
Thermostatic Valve
Without ushing valve
Without ushing valve
With ushing valve
With ushing valve
Flushing valve
Torque control valve
Starting control valve
Hydraulic inching valve
T1
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
51
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Automotive K With Hydraulic Inching
Pi Gas: Piloting pressure gauge port – 1/4 G (BSPP)
Pi UNF: Piloting pressure gauge port – 7/16" - 20 UNF
In: Piloting Pressure inching port – 1/8 G (BSPP)
T1: Drainage Pressure gauge port – 1/8 G (BSPP)
T: Drainage Pressure gauge port – 1/4 G (BSPP)
11.78 in [299.1 mm]
4.59 in [116.5 mm]
3.72 in [94.5 mm]
4.07 in [103.5 mm]
0.51 in [13 mm]
0.77 in [19.5 mm]
1.73 in [44 mm]
6.27 in [159.1 mm]
3.88 in [98.5 mm]
12.6 in [320.1 mm]
4.83 in [122.8 mm]
3.92 in [99.5 mm]
3.4 in [86.5 mm] 3.4 in [86.5 mm]
4.53 in [115 mm]
0.98 in [25 mm]
6.36 in [161.6 mm]
5.97 in [151.6 mm]
5.89 in [149.5 mm]
6.52 in [165.5 mm]
4.17 in [106 mm]
In
T
Pi UNF
Pi Gas
Thermostatic valve
Without ushing valve
Y1
T
Y2
Without ushing valve
With ushing valve
With ushing valve
Flushing valve
Torque control valve
Starting control valve
Hydraulic inching valve
T1
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
52
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Shaft
2: Splined SAE 1 - 3/8" 21T 16/32 Dp – Flat Root Class 5 ANSI B92.1a – 1976
Ø1.338 in [Ø34 mm]
2.2 in [55.9 mm]
1.89 in [48 mm]
1.58 in [40.2 mm]
1.42 in [36 mm]
M10
1: Splined SAE 1 - 1/4" 14T 12/24 Dp – Flat Root Class 5 ANSI B92.1a – 1976
2.2 in [55.9 mm]
1.89 in [48 mm]
39.3 in [1.55 mm]
0.87 in [22 mm]
Ø1.228 in [Ø31.2 mm]
3/8-16UNC-2B
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
53
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Pump and Accessories
Filter
Filter and Override Option E
Filter and Override Option P
5.67 in [144 mm]
4.14 in [105.1 mm]
5.42 in [137.6 mm]
5.26 in [133.5 mm]
2.83 in [72 mm]
Connector DIN43650 (ISO4400)
1.66 in [42.1 mm] 8.27 in [210 mm]
6.3 in [160 mm]
4.84 in [123 mm]
2.36 in [60 mm]
3.32 in [84.2 mm]
2.77 in [70.3 mm]
4.8 in [121.9 mm] 4.83 in [122.8 mm]
5.26 in [133.5 mm]
4.27 in [108.5 mm]
3.57 in [90.6 mm]
Cut-off pressure setting (M10)
Electric clogging indicator: Connector DIN 43650
Electric clogging indicator: Connector DIN 43650
Electric clogging indicator: Connector DIN 43650
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
54
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Filter and Override Option C
Override Option E
Override Option P
Electric clogging indicator: Connector DIN 43650
7.6 in [193.1 mm]
5.47 in [139 mm]
4.31 in [109.5 mm]0.52 in [13.3 mm]
4.68 in [118.8 mm]
Cut-Off Pressure Setting (M10)
7.6 in [193.1 mm]
0.41 in [10.5 mm]
6.04 in [153.5 mm]
3.6 in [91.5 mm]
4.74 in [120.5 mm]
4.8 in [122 mm]
Connector DIN43650 (ISO4400)
4.8 in [121.9 mm]
2.92 in [74.2 mm]
4.83 in [122.8 mm]
4.26 in [108.3 mm]
5.67 in [144 mm]
2.09 in [53 mm]
5.42 in [137.6 mm]
5.06 in [128.5 mm]
4.27 in [108.5 mm]
Cut-Off Pressure Setting (M10)
Connector DIN43650 (ISO4400)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
55
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Filter and Override Option C
4.72 in [120 mm]
1.18 in [30 mm]
BY-PASS opening screw
By-Pass (01)
Nut SEAL-LOCK (22 mm spanner)
Grub screw (6 mm allen-key)
7.6 in [193.1 mm]
Cut-Off Pressure Setting (M10)
Connector DIN43650
(ISO4400)
5.93 in [150.6 mm]
4.74 in [120.5 mm]
6.97 in [177 mm]
3.6 in [91.5 mm]
4.89 in [124.2 mm]0.52 in [13.3 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
56
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Through Drives
The C pump can be supplied with a through drive,
which can operate in tandem with a second pump.
Available anges include SAE A, SAE B, SAE C, SAE
B-B and SAE C-C anges.
Maximum permissible drive-shaft torques for the rst
pump, as well as maximum through drive torques are
listed in the table below.
WARNING:
The effective torque value on the shaft of first pump
is given by the sum of the torques required from
each pump making the system.
Size 081
Drive shaft
2
Z21 16/32 DP
1
Z14 12/24 DP
Drive shaft max torque Nm [lbf·ft] 950 (700) 620 (457)
Through drive max torque Nm [lbf·ft] 665 (490) 620 (457)
C081 Tandem for Reference
21.96 in [557.7 mm]
8.37 in [212.6 mm]
26.35 in [669.2 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
57
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C081
Through Drive Option A
Through Drive Option B and G
Through Drive Option C and H
12.85 in [326.6 mm]
4.17 in [106 mm]
0.37 in [9.5 mm]
0.79 in [20 mm]
To mounting ange
Splined
SAE A 5/8 9T 16/32 DP
No. 2 M10 Deep [0.59]
OR 2.62 x 82.22 (2-152)
3.25 in [Ø382.55 mm]
3/8-16 UNC-2B
12.85 in [326.6 mm]
0.53 in [13.5 mm]
6.89 in [175 mm]
5.77 in [146.6 mm]
0.39 in [10 mm]
0.79 in [20 mm]
To mounting ange
Splined
SAE B 7/8 13T 16/32 DP
SAE B-B 1 15T 16/32 DP
OR 2.62 x 101.27 (2-155)
No. 2 M12
1/2-13 UNC-2B
4 in [Ø101.6 mm]
13.56 in [344.6 mm]
1.5 in [38 mm]
4.51 in [114.6 mm]
4.51 in [114.6 mm]
5 in [Ø127mm]
7.13 in [181 mm]
To mounting ange
Splined
SAE C 1-1/4 14T 12/24 DP
SAE C-C 1-1/2 17T 12/24 DP
OR 3.53 x 126.60 (2-250)
No. 2 holes M16
No. 4 holes M14
1/2-13 UNC-2B
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
58
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
2.382 in [60.5 mm]
9.747 in [242.5 mm]
5.2 in [132 mm]
0.83 in [21 mm]0.83 in [21 mm]
6.362 in [161.6 mm]
5.2 in [132 mm]
Displacement setting
5.669 in [144 mm]
1.043 in [26.5 mm]
1.25 in [31.75 mm]
3.149 in [80 mm]
M14
1/2-13 UNC-2B
Depth 24 in [0.93 mm]
2.165 in [55 mm]
2.625 in [66.68 mm]
8.07 in [204.9 mm]
6.362 in [161.6 mm]
9.016 in [229 mm]
10.47 in [266 mm]
12.807 in [325.3 mm]
1.468 in [37.3 mm]
9.586 in [243.5 mm]
4.69 in [119 mm]89 in [3.504 mm]
1.488 in [37.8 mm]
1.004 in [25.5 mm]
10.267 in [260.8 mm]
14.34 in [364.3 mm]
7.228 in [183.6 mm]
5.669 in [144 mm]
5.37 in [136.5 mm]
7.82 in [198.7 mm]
6.32 in [160 mm]
1.653 in [42 mm]
1.496 in [38 mm]
4.331 in [110 mm]
10.267 in [260.8 mm]
7.283 in [185 mm]
0.50 in [12.7 mm]
3.799 in [96.5 mm]
1.338 in [34 mm]
Ø6 in [Ø152.4 mm]
Ø1.26 in [Ø32 mm]
X2
Z2a
V1
B
GT
GS
L1
PS
X1
Z1
S
FA1
GB
Z2
Z1a
FA2
A
GA
FA2
L3
7.126 in [181 mm]
8.11 in [205.9 mm]
L1
A Control
C136 Port Chart
Port Mount D Mount H
A 1-1/4" SAE CODE 62 1-1/4" SAE CODE 62
B 1-1/4" SAE CODE 62 1-1/4" SAE CODE 62
L1 -16 SAE ORB 1" G
L2 -16 SAE ORB 1" G
L3 -12 SAE ORB 3/4" G
FA1 -20 SAE ORB 1-1/4" G
FA2 -20 SAE ORB 1-1/4" G
GA -4 SAE ORB 1/4" G
GB -4 SAE ORB 1/4" G
C136 Port Chart
Port Mount D Mount H
GS -4 SAE ORB 1/4" G
PS -4 SAE ORB 1/4" G
Z1 (a) -4 SAE ORB 1/8" G
Z2 (a) -4 SAE ORB 1/8" G
X1 3/8" G 3/8" G
X2 3/8" G 3/8" G
Y1 4 SAE ORB 1/4" G
Y2 -4 SAE ORB 1/4" G
GT -4 SAE ORB 1/4" G
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
59
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
2.07 in [52.5 mm] 2.07 in [52.5 mm]
6.22 in [158 mm]
V1
Y2
Y1
7.31 in [185.8 mm]
5.984 in [152 mm]
5.984 in [152 mm]
5.429 in [137.9 mm]
V1
Y2 Y1
1.45 in [36.8 mm]
1.44 in [36.7 mm]
6.004 in [152.5 mm]
6.004 in [152.5 mm]
6.63 in [168.5 mm]
Y1-Y2: Control piloting pressure ports - 1/4 G (BSPP)
S1-V1: Adjustable throttle valve
V1: Adjustable throttle valve
C Control
D Control
5.44 in [138.2 mm]
3.35 in [85 mm] 3.35 in [85 mm]
7.889 in [200.4 mm]
7.889 in [200.4 mm]
8.33 in [211.5 mm]
V1
Connector DIN43650 (ISO4400)
V1: Adjustable throttle valve
E Control
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
60
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
6.4 in [162.7 mm]
3.66 in [93 mm]
2.5 in [63.5 mm]
3.66 in [93 mm]
2.5 in [63.5 mm]
Connector DIN43650 (ISO4400)
6.79 in [172.5 mm]
6.083 in [154.5 mm]
V1
8.03 in [204 mm]7.55 in [191.8 mm]
6.22 in [158 mm]
V1
7.09 in [180 mm]
7.09 in [180 mm]
5.205 in [132.2 mm]
Connector Deutsch DT04-2P
V1: Adjustable throttle valve
V1: Adjustable throttle valve
F Control
G Control
Y1-Y2: Control piloting pressure ports – 1/4G (BSPP)
V1: Adjustable throttle valve
H Control
6.22 in [158 mm]
3.311 in [84.1 mm]
1.87 in [47.5 mm]
4.72 in [120 mm] 4.72 in [120 mm]
3.311 in [84.1 mm]
1.87 in [47.5 mm]
Y1
Y2
Connector Deutsch DT04-2P
7.09 in [180 mm]
V1
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
61
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
Automotive J With Hydraulic Inching
T
14.02 in [356 mm]
Hydraulic inching valve
In
Connector DIN43650 (ISO4400)
Thermostatic valve
13.19 in [335 mm]
1.92 in [48.8 mm]
5.44 in [138.2 mm]
5.55 in [141 mm]
Pi UNF
Pi Gas
T1
7.2 in [183 mm]
4.69 in [119 mm]
5.04 in [128 mm]
7.38 in [187.5 mm]
7.78 in [197.5 mm]
7.48 in [190 mm]
6.85 in [174 mm]
Without ushing valve
With ushing valve
Starting control valve
With ushing valve
Without ushing valve
Torque control valve
Flushing valve
0.04 in [1 mm]
0.3 in [7.5 mm]
2.2 in [56 mm]
4.88 in [124 mm]
4.06 in [103 mm]
0.51 in [13 mm]
4.65 in [118 mm]
1.92 in [48.8 mm]
4.84 in [123 mm]
Pi Gas: Piloting pressure gauge port – 1/4 G (BSPP)
Pi UNF: Piloting pressure gauge port – 7/16" - 20 UNF
In: Piloting pressure inching port – 1/8 G (BSPP)
T1: Drainage pressure gauge port – 1/8 G (BSPP)
T: Drainage pressure gauge port – 1/4 G (BSPP)
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
62
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
Shaft
4: Splined 15T 8/16 Dp ANSI B92.1a
1976 Flat Root
6: Splined 27T 16/32 Dp ANSI B92.1a
1976 Flat Root
H: Splined W45x2x30x21 DIN 5480
3: Splined 13T 8/16 Dp ANSI B92.1a
1976 Flat Root
5: Splined 23T 16/32 Dp ANSI B92.1a
1976 Flat Root
G: Splined W40x2x30x18 DIN 5480
Ø1.74 in [Ø44.2 mm]
2.10 in [53.4 mm]
1.38 in [35 mm]
2.34 in [59.5 mm]
2.60 in [66 mm]
M10
Ø1.448 in [Ø37.8 mm]
1.38 in [35 mm]
1.96 in [50 mm]
1.73 in [43.9 mm]
2.22 in [56.5 mm]
M10
2.70 in [68.6 mm]
Ø1.992 in [Ø50.6 mm]
5/8 – 11UNC – 2B
1.42 in [36 mm]
3.21 in [81.5 mm]
3.46 in [88 mm]
2.35 in [59.6 mm]
1.42 in [36 mm]
Ø1.732 in [Ø44 mm]
5/8 – 11UNC – 2B
2.69 in [68.5 mm]
2.95 in [75 mm]
1.75 in [44.5 mm]
Ø1.751 in [Ø44.5 mm]
M16
1.42 in [36 mm]
2.11 in [53.5 mm]
2.36 in [60 mm]
1.55 in [39.3 mm]
Ø1.559 in [Ø39.6 mm]
M16
1.42 in [36 mm]
1.91 in [48.5 mm]
2.16 in [55 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
63
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
Pump and Accessories
9.02 in [229 mm]
Connector DIN43650 (ISO4400)
4.33 in [110 mm]0.93 in [23.5 mm]
3.123 in [79.5 mm]
6.69 in [170 mm]
5.394 in [137 mm]
3.07 in [78 mm]
Electric Clogging Indicator: Connector DIN43650 (ISO4400)
2.22 in [56.5 mm]
11.34 in [288 mm]
7.42 in [188.5 mm]
5.96 in [151.5 mm]
3.33 in [84.6 mm]
7.42 in [188.5 mm]
Connector DIN43650 (ISO4400)
2.382 in [60.55 mm]
Electric Clogging Indicator: Connector DIN43650 (ISO4400)
5.394 in [137 mm]
6.831 in [173.5 mm]
3.68 in [93.5 mm]
3.33 in [84.6 mm]
Filter and Override Option E
Filter and Override Option P
Filter
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
64
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
WARNING:
The effective torque value on the shaft of first pump
is given by the sum of the torques required from
each pump making the system.
Size 136
Drive shaft
3
Z13 8/16 DP
4
Z15 8/16 DP
5
Z23 16/32 DP
6
Z27 16/32 DP
7
W40x2x30x18
8
W45x2x30x21
Drive shaft max torque Nm [lbf·ft] 1640 (1208) 2670 (1967) 1250 (921) 1900 (1400) 1460 (1076) 2190 (1614)
Through drive max torque Nm [lbf·ft] 1000 (737) 1000 (737) 1000 (737) 1000 (737) 1000 (737) 1000 (737)
View From X
View From Y
1/4 G (BSPP)
Prof./Depth 12 [0.47]
0.787 in [20 mm]
7/16-20 UNF-2B
Prof./Depth 13 [0.51]
0.787 in [20 mm]
0.669 in [17 mm]
M10 Depth [0.71]
M10 Prof. 18
1.772 in [45 mm]1.772 in [45 mm]
0.669 in [17 mm]
3/8" – 16 UNC 2B Prof. 18
3/8" – 16 UNC 2B Depth [0.71]
Y
X
26.09 in [662.8 mm]
15.716 in [399.2 mm]
9.547 in [242.5 mm]
15.724 in [399.4 mm]
30.89 in [784.6 mm]
C136 Tandem for Reference
Through Drives
The C pump can be supplied with a through drive,
which can operate in tandem with a second pump.
Available anges include SAE A, SAE B, SAE C, SAE
B-B, SAE C-C and SAE-D.
Maximum permissible drive-shaft torques for the rst
pump, as well as maximum through drive torques are
listed in the table below.
Bolt holes for additional support brackets SAE D
through drive only.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
65
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
Tandem Combination C136 + C081
23.54 in [597.9 mm]
9.55 in [242.5 mm]
27.93 in [709.4 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
66
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
Through Drive Option A
Through Drive Option B and G
Through Drive Option C and H
14.42 in [366.3 mm]
No. 2 M12
1/2-13 UNC-2B
4 in [Ø101.6 mm]
0.53 in [13.5 mm]
6.89 in [175 mm]
5.77 in [146.6 mm]
Splined
SAE B 7/8 13T 16/32 DP
SAE B-B 1" 15T 16/32 DP
OR 2.62 x 101.27 (2-155)
0.393 in [10 mm]
0.79 in [20 mm]
15.12 in [384.3 mm]
To mounting ange
Splined
SAE C 1" 1/4 14T 12/24 DP
SAE C-C 1" 1/2 17T 12/24 DP
OR 3.53 x 126.60 (2-250)
5 in [Ø127 mm]
1.5 in [38 mm]
7.13 in [181 mm]
No. 4 holes M14
1/2-13 UNC-2B
No. 2 holes M16
4.51 in [114.6 mm]
4.51 in [114.6 mm]
No. 2 M10 deep [0.59]
3/8-16 UNC-2B
14.42 in [366.3 mm]
To mounting ange
Splined
SAE A 5/8 9T 16/32 DP
OR 2.62 x 82.22 (2-152)
3.25 in [Ø82.55 mm]
0.374 in [9.5 mm]
0.79 in [20 mm]
4.17 in [106 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
67
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Dimensions C136
Through Drive Option D
16.51 in [419.4 mm]
To mounting ange
Splined
SAE D 1" 3/4 13T 8/16 DP
No. 4 holes M20
3/4-10 UNC-2B
OR 3.53 x 151.99 (2-258)
6 in [Ø152.4 mm]
0.34 in [8.5 mm]
6.36 in [161.1 mm]
No. 2 holes M20
9 in [228.6 mm]
10.63 in [270 mm]
6.36 in [161.6 mm]
2.88 in 73.1 mm]
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
68
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Installation Information
General Installation Information
Installation Guidelines
Pump case should be lled prior to start up and
plumbed to ensure it remains lled with uid under all
conditions. Pump case pressure should not exceed
4 bar (58 PSI) continuous pressure, 6 bar (87 PSI) on
cold start up.
Care should be taken to ensure line velocities are not
above standard design specications as noted in Table
1. Raised line velocities will case an increase in pressure
loss in the hoses and cause premature failure under
certain conditions. Pressure in the suction line of the
pump should never be below .8 bar (11.6 PSI) absolute.
Maximum suction pressure is 4 bar (58 psi) continuous
and 6 bar (87 psi) on cold startup.
Long line lengths and sharp turns in the uid conveyance
will add additional pressure loss or restriction to the
system. It is recommended to keep the line lengths as
short as possible and to avoid as many uid direction
changes in the system as possible.
Installation Orientation
The C Series pump can be installed in many different
orientations; see Figure 1 for examples. If you are
wanting to mount the unit in an orientation not shown
please contact technical support.
It is suggested that the pump be mounted so that it
is level or below minimum uid level in the hydraulic
reservoir. The pump can be mounted above uid level
but ensure the case remains lled at all times and
proper suction pressure is maintained when mounting
in this manner.
Regardless of installation orientation the highest case
drain port (L1, L2 or L3) should always be used and
should return below uid level. See Figure 2 for drain
port suggestions and suggested air bleed port.
Air bleed port should only be used while lling the case
of the unit to ensure the unit is completely lled with
uid. Once unit is lled, the air bleed port should be
closed via a port plug or shut off valve.
Fluid
Parker recommends using a uid with a petroleum base
and contains agents which provide oxidation inhibition
and anti-rust, anti-foam and deteriorating properties as
described in Parker standard HF-1. Where anti-wear
additive uids are specied, see Parker standard HF-0.
Use uids with a minimum Viscosity index of 90.
Higher viscosity index extend the range of operating
temperatures but may reduce the service life of the uid.
It is recommended that the reservoir, hydraulic uid
and uid conveyance items be cleaned prior to use.
Filtration of the uid is recommended before and during
use. Maximum uid contamination level is 20/18/15 per
ISO 4406:1999. Better cleanliness levels will increase
the life of the system.
Function Fluid Velocity m/sec (Ft/sec)
Suction 0.6-1.2 (2-4)
Case drain 1.5-3 (5-10)
Pressure 3-6 (10-20)
Table 1
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
69
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Installation Information
Air bleed
Air bleed
OIL
OIL
OIL
OIL
OIL
S
S
L2
L2
L3
L3
L1
L1/L2
Figure 1: Optional Mounting Orientations
A
D
B*
E
C
*Contamination can cause issues when mounting in this orientation.
Ensure system is clean when this orientation is used.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
70
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Installation Information
Air bleed
Air bleed
OIL
OIL
OIL
OIL
OIL
S
S
L2
L2
L3
L3
L1
L1/L2
A
D
B
E
C
Figure 2: Case Drain and Air Bleed Recommendations
Customer must verify adequate cooling flow through pump case in
their application.
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
71
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
Notes
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
72
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
OFFER OF SALE
Th
e items described in this document and other documents and descriptions provided by Parker Hannifin Corporation, its subsidiaries and its authorized distributors (“Seller”)
ar
e hereby offered for sale at prices to be established by Seller. This offer and its acceptance by any customer (“Buyer”) shall be governed by all of the following Terms and
Cond
itions. Buyer’s order for any item described in its document, when communicated to Seller verbally, or in writing, shall constitute acceptance of this offer. All goods,
servic
es or work described will be referred to as “Products”.
1.
Terms and Conditions.
Seller’s willingness to offer Products, or accept an
or
der for Products, to or from Buyer is subject to these Terms and Conditions or
an
y newer version of the terms and conditions found on-line at
www.pa
rker.com/saleterms/. Seller objects to any contrary or additional terms or
co
nditions of Buyer’s order or any other document issued by Buyer.
2.
Price Adjustments; Payments. Prices stated on Seller’s quote or other
do
cumentation offered by Seller are valid for 30 days, and do not include any
sales,
use, or other taxes unless specifically stated. Unless otherwise specified by
Seller, all pric
es are F.C.A. Seller's facility (INCOTERMS 2010). Payment is
subj
ect to credit approval and is due 30 days from the date of invoice or such
ot
her term as required by Seller’s Credit Department, after which Buyer shall pay
interest
on any unpaid invoices at the rate of 1.5% per month or the maximum
allo
wable rate under applicable law.
3.
Delivery Dates; Title and Risk; Shipment. All delivery dates are approximate
an
d Seller shall not be responsible for any damages resulting from any delay.
Rega
rdless of the manner of shipment, title to any products and risk of loss or
da
mage shall pass to Buyer upon placement of the products with the shipment
carri
er at Seller's facility. Unless otherwise stated, Seller may exercise its
j
udgment in choosing the carrier and means of delivery. No deferment of shipment
at Bu
yers' request beyond the respective dates indicated will be made except on
term
s that will indemnify, defend and hold Seller harmless against all loss and
addi
tional expense. Buyer shall be responsible for any additional shipping
char
ges incurred by Seller due to Buyer’s acts or omissions.
4.
Warranty. Seller warrants that the Products sold hereunder shall be free from
de
fects in material or workmanship for a period of eighteen months from the date
of sh
ipment from the Company. The prices charged for Seller's products are
bas
ed upon the exclusive limited warranty stated above, and upon the following
disclai
mer: DISCLAIMER OF WARRANTY: THIS WARRANTY COMPRISES
TH
E SOLE AND ENTIRE WARRANTY PERTAINING TO PRODUCTS
PROVIDED HEREUNDE
R. SELLER DISCLAIMS ALL OTHER WARRANTIES,
EXPRESS
AND IMPLIED, INCLUDING DESIGN, MERCHANTABILITY AND
FI
TNESS FOR A PARTICULAR PURPOSE.
5.
Claims; Commencement of Actions. Buyer shall promptly inspect all
Products upon deliv
ery. No claims for shortages will be allowed unless reported to
the
Seller within 10 days of delivery. No other claims against Seller will be allowed
unle
ss asserted in writing within 30 days after delivery. Buyer shall notify Seller of
an
y alleged breach of warranty within 30 days after the date the defect is or
sh
ould have been discovered by Buyer. Any action based upon breach of this
ag
reement or upon any other claim arising out of this sale (other than an action by
Seller for an amount due on an
y invoice) must be commenced within 12 months
from
the date of the breach without regard to the date breach is discovered.
6.
LIMITATION OF LIABILITY. UPON NOTIFICATION, SELLER WILL, AT ITS
OPTION, REPA
IR OR REPLACE A DEFECTIVE PRODUCT, OR REFUND THE
PURCHASE PR
ICE. IN NO EVENT SHALL SELLER BE LIABLE TO BUYER
FOR
ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DA
MAGES ARISING OUT OF, OR AS THE RESULT OF, THE SALE,
DELIVE
RY, NON-DELIVERY, SERVICING, USE OR LOSS OF USE OF THE
PRODUCT
S OR ANY PART THEREOF, OR FOR ANY CHARGES OR
EXPENSES OF
ANY NATURE INCURRED WITHOUT SELLER'S WRITTEN
CONSENT,
EVEN IF SELLER HAS BEEN NEGLIGENT, WHETHER IN
CONT
RACT, TORT OR OTHER LEGAL THEORY. IN NO EVENT SHALL
SE
LLER'S LIABILITY UNDER ANY CLAIM MADE BY BUYER EXCEED THE
PURCH
ASE PRICE OF THE PRODUCTS.
7.
User Responsibility. The user, through its own analysis and testing, is solely
resp
onsible for making the final selection of the system and Product and assuring
that
all performance, endurance, maintenance, safety and warning requirements
of
the application are met. The user must analyze all aspects of the application
an
d follow applicable industry standards and Product information. If Seller
prov
ides Product or system options, the user is responsible for determining that
such
data and specifications are suitable and sufficient for all applications and
reas
onably foreseeable uses of the Products or systems.
8.
Loss to Buyer's Property. Any designs, tools, patterns, materials, drawings,
conf
idential information or equipment furnished by Buyer or any other items
which
become Buyer's property, will be considered obsolete and may be
dest
royed by Seller after two consecutive years have elapsed without Buyer
or
dering the items manufactured using such property. Seller shall not be
resp
onsible for any loss or damage to such property while it is in Seller's
poss
ession or control.
9.
Special Tooling. A tooling charge may be imposed for any special tooling,
includi
ng without limitation, dies, fixtures, molds and patterns, acquired to
ma
nufacture Products. Such special tooling shall be and remain Seller's property
no
twithstanding payment of any charges by Buyer. In no event will Buyer acquire
an
y interest in apparatus belonging to Seller which is utilized in the manufacture of
the
Products, even if such apparatus has been specially converted or adapted for
such
manufacture and notwithstanding any charges paid by Buyer. Unless
ot
herwise agreed, Seller shall have the right to alter, discard or otherwise dispose
of
any special tooling or other property in its sole discretion at any time.
10.
Buyer's Obligation; Rights of Seller. To secure payment of all sums due or
ot
herwise, Seller shall retain a security interest in the goods delivered and this
ag
reement shall be deemed a Security Agreement under the Uniform Commercial
Code
. Buyer authorizes Seller as its attorney to execute and file on Buyer's behalf
all do
cuments Seller deems necessary to perfect its security interest.
11.
Improper use and Indemnity. Buyer shall indemnify, defend, and hold
Seller harmless from an
y claim, liability, damages, lawsuits, and costs (including
attorney fees), whether for personal injury, property damage, patent, trademark or
copyright infringement or any other claim, brought by or incurred by Buyer,
Buyer’s employees, or any other person, arising out of: (a) improper selection,
improper application or other misuse of Products purchased by Buyer from Seller;
(b) any act or omission, negligent or otherwise, of Buyer; (c) Seller’s use of
patterns, plans, drawings, or specifications furnished by Buyer to manufacture
Product; or (d) Buyer’s failure to comply with these terms and conditions. Seller
shall not indemnify Buyer under any circumstance except as otherwise provided.
12. Cancellations and Changes
. Orders shall not be subject to cancellation or
change by Buyer for any reason, except with Seller's written consent and upon
terms that will indemnify, defend and hold Seller harmless against all direct,
incidental and consequential loss or damage. Seller may change product features,
specifications, designs and availability with notice to Buyer.
13. Limitation on Assignment
. Buyer may not assign its rights or obligations
under this agreement without the prior written consent of Seller.
14. Force Majeure
. Seller does not assume the risk and shall not be liable for
delay or failure to perform any of Seller’s obligations by reason of circumstances
beyond the reasonable control of Seller (hereinafter “Events of Force Majeure”).
Events of Force Majeure shall include without limitation: accidents, strikes or labor
disputes, acts of any government or government agency, acts of nature, delays or
failures in delivery from carriers or suppliers, shortages of materials, or any other
cause beyond Seller’s reasonable control.
15. Waiver and Severability
. Failure to enforce any provision of this agreement
will not waive that provision nor will any such failure prejudice Seller’s right to
enforce that provision in the future. Invalidation of any provision of this agreement
by legislation or other rule of law shall not invalidate any other provision herein.
The remaining provisions of this agreement will remain in full force and effect.
16. Termination.
Seller may terminate this agreement for any reason and at any
time by giving Buyer thirty (30) days written notice of termination. Seller may
immediately terminate this agreement, in writing, if Buyer: (a) commits a breach of
any provision of this agreement (b) appointments a trustee, receiver or custodian
for all or any part of Buyer’s property (c) files a petition for relief in bankruptcy on
its own behalf, or by a third party (d) makes an assignment for the benefit of
creditors, or (e) dissolves or liquidates all or a majority of its assets.
17. Governing Law
. This agreement and the sale and delivery of all Products
hereunder shall be deemed to have taken place in and shall be governed and
construed in accordance with the laws of the State of Ohio, as applicable to
contracts executed and wholly performed therein and without regard to conflicts of
laws principles. Buyer irrevocably agrees and consents to the exclusive
jurisdiction and venue of the courts of Cuyahoga County, Ohio with respect to any
dispute, controversy or claim arising out of or relating to this agreement.
18. Indemnity for Infringement of Intellectual Property Rights
. Seller shall
have no liability for infringement of any patents, trademarks, copyrights, trade
dress, trade secrets or similar rights except as provided in this Section. Seller will
defend and indemnify Buyer against allegations of infringement of U.S. patents,
U.S. trademarks, copyrights, trade dress and trade secrets (“Intellectual Property
Rights”). Seller will defend at its expense and will pay the cost of any settlement or
damages awarded in an action brought against Buyer based on an allegation that
a Product sold pursuant to this Agreement infringes the Intellectual Property
Rights of a third party. Seller's obligation to defend and indemnify Buyer is
contingent on Buyer notifying Seller within ten (10) days after Buyer becomes
aware of such allegations of infringement, and Seller having sole control over the
defense of any allegations or actions including all negotiations for settlement or
compromise. If a Product is subject to a claim that it infringes the Inte
llectual
Property Rights of a third party, Seller may, at its sole expense and option,
procure for Buyer the right to continue using the Product, replace or modify the
Product so as to make it noninfringing, or offer to accept return of the Product and
return the purchase price less a reasonable allowance for depreciation.
Notwithstanding the foregoing, Seller shall have no liability for claims of
infringement based on information provided by Buyer, or directed to Products
delivered hereunder for which the designs are specified in whole or part by Buyer,
or infringements resulting from the modification, combination or use in a system of
any Product sold hereunder. The foregoing provisions of this Section shall
constitute Seller's sole and exclusive liability and Buyer's sole and exclusive
remedy for infringement of Intellectual Property Rights.
19. Entire Agreement
. This agreement contains the entire agreement between
the Buyer and Seller and constitutes the final, complete and exclusive expression
of the terms of sale. All prior or contemporaneous written or oral agreements or
negotiations with respect to the subject matter are herein merged.
20. Compliance with Law, U. K. Bribery Act and U.S. Foreign Corrupt
Practices Act. Buyer agrees to comply with all applicable laws and regulations,
including both those of the United Kingdom and the United States of America, and
of the country or countries of the Territory in which Buyer may operate, including
without limitation the U. K. Bribery Act, the U.S. Foreign Corrupt Practices Act
(“FCPA”) and the U.S. Anti-Kickback Act (the “Anti-Kickback Act”), and agrees to
indemnify and hold harmless Seller from the consequences of any violation of
such provisions by Buyer, its employees or agents. Buyer acknowledges that they
are familiar with the provisions of the U. K. Bribery Act, the FCPA and the Anti-
Kickback Act, and certifies that Buyer will adhere to the requirements thereof. In
particular, Buyer represents and agrees that Buyer shall not make any payment or
give anything of value, directly or indirectly to any governmental official, any
foreign political party or official thereof, any candidate for foreign political office, or
any commercial entity or person, for the purpose of influenc
ing such person to
purchase products or otherwise benefit the business of Seller. 04/2014
Offer of Sale
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
73
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
United States
Revisions
HY28-2686-01/C/US
Variable Displacement Axial Piston Pumps
C Series
August 2020
July 2017
January 2017
Replaced pump control – G Image, added Fan Driv
e Control – R pages
Correction to ow direction charts, minor updates to pump layout drawings and
port callouts
Added 55cc information, added updated model code information, removed B
control option, other cosmetic updates and minor corrections applied
Updated page 3 Model Code Chart
The products described in this catalog can expose you to chemicals, including Lead, which is known to the State of California to cause cancer and birth defects or other
reproductive harm. For more information go to www.p65warnings.ca.gov.
WARNING
August 2022
HY28-2686-01/C/US
8/202
2
© 202
2 Parker Hannifin Corporation
Parker Hannin Corporation
Hydraulic Pump and Power Systems Division
14249 Industrial Pkwy.
Marysville, OH 43040
phone 937 644 3915
fax 937 642 3738
www.parker.com/hps
