420 Mobile Piston Pump
Design Code B
ADU041
ADU049
ADU062
ADU080
2 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Introduction
Eaton’s 420 Series mobile pumps are open circuit,
axial piston designs with displacements of 41cc, 49cc,
62cc, and 80cc for operating speeds up to 2,650 rpm.
They are available with a variety of control options to
match their performance to a broad range of mobile
applications.
The highly efficient pump controls reduce cooling
system requirements, allowing a smaller and less
expensive design to be used. Or, cooling capacity can
be kept the same and the flow capability of the system
increased to improve performance.
A strong, field-proven rotating group allows the
pumps to handle pressures to 280 bar (4000 psi)
continuous and 320 bar (4600 psi) intermittent – with
less maintenance cost. 420 Series pumps use a saddle-
type swashplate with steel-backed polymer bearings
and a pressure lubrication passage to reduce wear and
support internal loads.
The swashplate is very stiff, which reduces deflection
and allows even loading of the bearings to extend
the unit’s service life. The combination of high load
capacity bearings and a stiff drive shaft help provide
a pump B10 bearing life of 3320 hours at rated mobile
conditions, reducing operating costs and extending
operating life.
A single control piston is used to vary pump output.
This design reduces the forces acting on the
swashplate, resulting in reduced package size, which
allows pump installation into tighter locations.
In response to customer expectations and regulatory
requirements, Eaton has designed the 420 Series
pumps to operate at very low noise levels. A
bimetal timing plate is used to improve pump filling
characteristics which further reduces fluid-borne noise
and extends pump life.
Both SAE and ISO mounting flange configurations are
available as well as SAE and ISO tube- and flange-
type ports. Side- or end-ported models are available to
facilitate plumbing and help fit the pump to machine
space needs, as are multiple drain ports to allow many
mounting orientations.
Typical Applications
• Loader backhoes
• Vibratory cable plows
• Mining machinery
• Dump truck lifts
• Agriculture tractors
• Chemical applicator trucks
• Railroad equipment
• Container handling, all-terrain,
and truck cranes
• Vibratory cable plows
• Mining machinery and tunnel
boring equipment
• Utility boom, off-road dump,
and refuse trucks
• Material handling trucks and
rough terrain fork lifts
• Concrete and asphalt pavers
• Feller/bunchers, forwarders,
and log loaders
• Crawler dozers
• Articulate haulers
• Mini-excavators
Features and Benefits
• Long pump life
• Quiet pump operation
• Low installed and
operating costs
• Reduced maintenance
• Flexibility in machine design
• Compact size saves space
• Design promotes leak-free
system
420 Series Mobile Piston Pump
3EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Table of Contents
Model Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Specifications and Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Control Options
Load Sense and Pressure Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Pressure Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Torque Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Cold Start Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Performance
ADU041 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
ADU049 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
ADU062 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
ADU080 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Pump Installation
B-mount – Rear-ported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
B-mount – Side-ported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
C-mount – Rear-ported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
C-mount – Side-ported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Thru-Drive SAE A Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Thru-Drive SAE B Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Dual Shaft Seal Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Control Installation
Load Sense and Pressure Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Pressure Compensator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Torque Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Cold Start Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
External Manual Stroke Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Input Shaft Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Installation and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
4 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Model Codes
420 Mobile Piston Pump
1 2 3
Pump Series
ADU – 420 Series Open
Circuit Piston Pump
4 5 6
Pump Displacement
041 – 41.0 cm
3
/r [2.50 in
3
/r]
049 – 49.2 cm
3
/r [3.00 in
3
/r]
062 – 62.3 cm
3
/r [3.80 in
3
/r]
080 – 80.0 cm
3
/r [4.88 in
3
/r]
7
Input Shaft Rotation
R – Right Hand
L – Left Hand
8 9
Front Mount and Shaft
01 – 2 Bolt B, 22.2 mm
(0.875in.) Dia. Keyed Shaft
02 – 2 Bolt B, 25.4 mm
(1.00in.) Dia. Keyed Shaft
03 – 2 Bolt B, 22.22 mm
(.875in.) Dia. Tapered
Keyed Shaft
05 – 2 Bolt B, 13 Tooth 16/32
Spline
08 – 2 Bolt B,15 Tooth 16/32
Spline
32 – 2/4 Bolt C, 14 Tooth
12/24 Spline
33 – 2/4 Bolt C, 31.8 mm
(1.25in) Dia. Keyed Shaft
34 – 2 Bolt B, 15 Tooth 16/32
Sled Runner Spline
35 – 2 Bolt B, 14 Tooth 12/24
Spline
38 – 2/4 Bolt C, 31.75 mm
(1.25) Dia. Tapered Keyed
Shaft
10 11
Main Ports Size
& Location
AA – Rear Ports
Suction - 2” (Code 61);
Pressure - 1” (Code 61)
AB – Side Ports
Suction - 2” (Code 61);
Pressure - 1” (Code 61)
AC – Rear Ports
Suction - 2” (Code 61)
with M12 Threads;
Pressure - 1” (Code 61)
with M10 Threads.
AD – Side Ports
Suction - 2” (Code 61)
with M12 Threads;
Pressure - 1” (Code 61)
with M10 Threads.
AE –
Rear Ports
Suction - SAE O-Ring
Port; Pressure - UN-2B
SAE O-Ring Port
(ADU041 & ADU049 only)
AF
– Side Ports
Suction - #24 SAE
O-Ring;
Pressure - #16 SAE
O-Ring
(ADU041 and
ADU049 Only)
AG – Rear Ports
Suction - M48
Metric O-Ring;
Pressure - M33
Metric O-Ring
(ADU041 & ADU049 Only)
AH – Side Ports
Suction - M48
Metric O-Ring;
Pressure - M33
Metric O-Ring
(ADU041 & ADU049 Only)
AK – Rear Ports
Suction - 2” (Code 61);
Pressure - #16 SAE
O-Ring
(ADU062 Only)
12
Case Drain Ports
1 – #12 SAE O-Ring - Top
2 – #12 SAE O-Ring - Bottom
3 – M27 x 2 O-Ring - Top
4 – M27 O-Ring - Bottom
5 – #12 SAE O-Ring - Left
Side (Swash Sensor Boss)
6 – G 3/4 (BSPP) - Top
13
Diagnostic Pressure Ports
Not available on thru-drive
units
0 – No Diagnostic Pressure
Ports
1 – #6 SAE O-Ring - Plugged
(Rear Ports Only)
2 – M14 Metric O-Ring -
Plugged
(Rear Ports Only)
3 – #4 SAE O-Ring - Plugged
(Side Ports Only)
4 – M12 Metric O-Ring -
Plugged
(Side Ports Only)
14
Controller Type
A – Pressure Flow
Compensator With
#4 SAE O-Ring
Load Sense Port
B – Pressure Flow
Compensator With
M12 Metric O-Ring
Load Sense Port
C – Pressure Compensator
Only
E – Pressure Flow
Compensator With
G 1/4 (BSPP) Load Sense
Port
H – Pressure Flow
Compensator With
Torque Control #4 SAE
O-Ring Load Sense Port
J – Pressure Flow
Compensator With Torque
Control M12 Metric O-Ring
Load Sense Port
K – Pressure Compensator
With Torque Control
15 16
Pressure Compensator
Setting (Tolerance on
Setting)*
28 – 207-214 bar
[3000-3100 lbf/in
2
]
35 – 241-248 bar
[3500-3600 lbf/in
2
]
43 – 276-283 bar
[4000-4100 lbf/in
2
]
ADU 062 R 08 A B 1 0 A 43 14 00 0A 1 AB 1 00 CD 0 B
1
7 12 13 14 21 22 23 26
2 3 4 5 6
8 9
10 11 15 16 17 18 323129 3027 2824 2519 20
* Additional Settings Available by
Request
Items that are bold indicate preferred
configuration.
5EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
ADU 062 R 0 8 AB 1 0 A 43 14 00 0A 1 AB 1 00 CD 0 B
1
7 12 13 14 21 22 23 26
2 3 4 5 6
8 9
10 11 15 16 17 18 323129 3027 2824 2519 20
Model Codes
420 Mobile Piston Pump
17 18
Flow Compensator
Setting (Tolerance
on Setting)*
00 – No Flow Compensator
Setting
14 – 12-15 bar
[180-220 lbf/in
2
]
24 – 23-26 bar
[330-370 lbf/in
2
]
19 20
Torque Control
Setting
00 – No Torque Control
AA – 40 Nm [350 in-lbs]
(41,49)
AB – 51 Nm [450 in-lbs]
(41,49)
AC – 62 Nm [550 in-lbs]
(41,49,62)
AD – 73 Nm [650 in-lbs]
(41,49,62,80)
AE – 85 Nm [750 in-lbs]
(41,49,62,80)
AF – 96 Nm [850 in-lbs]
(41,49,62,80)
AG – 107 Nm [950 in-lbs]
(41,49,62,80)
AH – 119 Nm [1050 in-lbs]
(49,62,80)
AJ – 130 Nm [1150 in-lbs]
(49,62,80)
AK – 141 Nm [1250 in-lbs]
(49,62,80)
AL – 153 Nm [1350 in-lbs]
(62,80)
AM – 164 Nm [1450 in-lbs]
(62,80)
AN – 175 Nm [1550 in-lbs]
(62,80)
AP – 186 Nm [1650 in-lbs]
(62,80)
AR – 198 Nm [1750 in-lbs]
(62,80)
AT – 209 Nm [1850 in-lbs]
(62,80)
AU – 220 Nm [1950 in-lbs]
(80)
21 22
Control Special
Features
00 – Control Special Features
0A – Bleed Down Orifice
0D – 12V Cold Start Valve
23
Maximum Displacement
Option*
1 – Standard Displacement
(As Given In Code Title)
2 – External Manual
Stroke Adjustment
24 25
Auxiliary (Rear) Mount
& Output Shaft
00 – No Auxiliary Mounting
Features
AB – SAE A 2 Bolt,
11T 16/32 Spline
AC – SAE B 2 Bolt,
13T 16/32 Spline
AD – SAE B 2 Bolt,
15T 16/32 Spline
AE – SAE A 2 Bolt,
9T 16/32 Spline
26
Shaft Seal
0 – No Shaft Seal
1 – Standard Polyacrylate
Shaft Seal
2 – Viton
Shaft Seal
3
†
– Double, Two-Way Shaft
Seal, Viton With VHO Filter
4 – Nitrile Shaft Seal
5 – Single Viton Shaft Seal
in 2/4 Bolt C Mount
Pump Housing
† Not available on SAE B mount
27 28
Pump Special Features
00 – No Special Features
AA – Auxiliary Mounting
Cover Plate
AB – Swash Position Sensor
AC – Shaft Speed Sensor
AD – Modified End Cover,
Corner Removed
AE – Support Studs (1/2-13
UNC-2B x 117.8 (4.64)
Long in Top Two End
Cover/Housing Bolt
Locations
AG – Swash Position Sensor
and Shaft Speed Sensor
29 30
Paint
00 – No Paint
CD – Blue Primer
31
Identification/Packaging
0 – Standard Eaton
Identification Box
Packaging
32
Design Level
B – Second Design
* Additional Settings Available by
Request
Items that are bold indicate preferred
configuration.
6 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Specifications and
Performance
Inlet Pressure, Case Pressure, and Operating Temperature Requirements
Inlet Pressure Case Pressure Operating Temperature
Maximum Maximum Minimum Maximum
Rated Minimum Maximum Continuous Intermittent Peak Rated Temperature Intermittent
bar abs (psig) bar abs (in. Hg) bar abs (psig) bar abs (psig) bar abs (psig) bar abs (psig) °C (°F) °C (°F) °C (°F)
1.0 (0) 0.85 (5) 4.4 (50) 1.3 (5) 3.1 (30) 6.2 (75) 93 (200) -37 (-35) 104 (220)
Hydraulic Fluids
Recommended Minimum Viscosity @ Max.
Operating Maximum Maximum Viscosity Intermittent Temperature of Minimum
Viscosity Range Continuous at Startup 93°C (200°F) Intermittent
Fluid cSt (SUS) cSt (SUS) cSt (SUS) cSt (SUS) cSt (SUS)
Use antiwear hydraulic oil, 16 to 40 (80 to 188) 430 (1192) 2100 (9720) 10 (59) 6 (46)
or automotive type crankcase
oil (designations SC, SD, SE
or SF) per SAE J183 FEB80
For more information, see Eaton publication 579. For operation on other alternative or environmentally friendly fluids, please contact your Eaton Representative.
General Performance Specifications
Units ADU041 ADU049 ADU062 ADU080
Displacement cc/r (in
3
/r) 41.0 (2.50) 49.2 (3.00) 62.3 (3.80) 80.0 (4.88)
Weight Single Seal
1
kg (lbm) 22.9 (50.4) 22.9 (50.4) 23.8 (52.4) 24.2 (53.4)
Dual Seal
1
24.1 (53.1) 24.1 (53.1) 25.0 (55.1) 25.4 (56.1)
Pressure Continuous bar (psi) 280 (4060) 280 (4060) 280 (4060) 210 (3050)
Intermittent
2
320 (4600) 320 (4600) 320 (4600) 230 (3335)
Peak
3
350 (5000) 350 (5000) 350 (5000) 250 (3625)
Speed
4
At 1 bar abs (0 psig) rpm 2650 2650 2600 2200
At .85 bar abs (5 in.Hg) 2450 2450 2400 1800
At 2 bar abs (15 psig) 2950 2950 2800 N/A
Max (standby) 3600 3600 3600 3600
Min 600 600 600 600
Power Max (theoretical) kW (hp) 50.7 (68.0) 60.8 (81.5) 75.6 (101.3) 61.7 (82.7)
Standby .98 (1.3) .98 (1.3) 1.1 (1.5) 1.4 (1.9)
Torque Max (theoretical) Nm (lb-ft) 183 (135) 219 (162) 278 (205) 268 (198)
Bearing Life
5
At 140 bar (2030 psi) B10 Hours 103,650 55,580 33,500 17,150
At 210 bar (3045 psi) 26,830 14,380 8,670 4,440
At 280 bar (4060 psi) 10,280 5,510 3,320 N/A
Mass Moment of Inertia Nm-sec
2
.0033 .0033 .0046 .0058
(lb-in-sec
2
) (.0288) (.0288) (.0403) (.0517)
1 Standard SAE B non-through drive.
2 Less than 10% of duty cycle.
3 Momentary system pressure spikes only.
4 Ratings based on Flange ports. Note: Tube ports are not available on the 62cc and 80cc displacements.
5 Bearing life ratings at rated speed - 1 bar abs (0 psig) inlet.
7EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
“B” inlet
“F” case
drain
“C” outlet
To load
“J” load
sense
signal
port
Optional bleed-down orifice in
Code A or B with control special feaure "A".
ø 0,4 mm (.015 in.). Orifice is plugged for
no bleed down in control Code A or B.
“K” inlet
gage port
(optional)
“K”outlet
gage port
(optional)
Control Options
Load Sense and Pressure
Compensator
Load Sense and Pressure
Compensator Control
The pump will provide power
matching of pump output to
system load demand, maxi-
mizing efficiency and improv-
ing load metering characteris-
tics of any directional control
valve installed between the
pump and the load.
Load sensing ensures that
the pump always provides
only the amount of flow
needed by the load. At the
same time, the pump operat-
ing pressure adjusts to the
actual load pressure plus a
pressure differential required
for the control action. When
the system is not demanding
power, the load sense control
will operate in an energy-
saving stand-by mode.
Typically, the differential
pressure is that between the
pressure inlet and service
port of a proportionally
controlled directional valve,
or a load sensing directional
control valve. See the model
code on page 4 for differen-
tial pressure settings for load
sensing.
If the load pressure exceeds
the system pressure setting,
the pressure compensator
de-strokes the pump. The
load sensing line must be
as short as possible and can
also be used for remote con-
trol or unloading of the pump
pressure. For remote control
purposes, it is recommended
that you contact your Eaton
Representative for the cor-
rect configuration of the
control.
Warning: The pressure com-
pensator may be adjusted
beyond the rated pressure of
the pump. When adjusting
the pressure limiter, install a
0-350 bar (0-5000 psi) gage
in the outlet gage port and
limit the pressure setting to
the continuous rated pres-
sure for the pump displace-
ment shown on page 6.
Flow Compensator
(Load Sense) Settings
There are three springs
used to cover the load
sense adjustment range
of this control.
Pressure Limit Settings
The pressure compensator
uses two springs to cover
the full pressure range of
the ADU pumps. The high
pressure spring covers the
range from 140 bar (2050
psi) to 280 bar (4060 psi).
The low pressure spring
is adjustable from minimum
pressure through 140 bar
(2050 psi).
Typical Operating Curve
Dynamic Response per SAE J745 (Using Swash Plate Position)
Response Recovery Load Sense
(off stroke) (on stroke) Recovery
msec msec msec
ADU041 20 75 90
ADU049 20 75 90
ADU062 25 90 115
ADU080 26 75 115
Outlet Pressure
Outlet Flow
Q
P
Outlet Pressure
Outlet Flow
Q
P
Code C - Page 8Code A & B - Page 7
8 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Control Options
Pressure Compensator
Pressure Compensator
Control
The pump will provide a con-
tinuously modulated flow to
meet changing load demands
at a pre-adjusted compensa-
tor pressure. At pressures
below the compensator set-
ting, the pump will operate
at maximum displacement.
See model code on page 4
for compensator pressure
ranges.
Warning: The pressure com-
pensator may be adjusted
beyond the rated pressure
of the pump. When adjusting
the pressure limiter, install a
0-350 bar (0-5000 psi) gage
in the outlet gage port and
limit the pressure setting to
the continuous rated pres-
sure for the pump displace-
ment shown on page 6.
Pressure Limit Settings
The pressure compensator
uses two springs to cover
the full pressure range of
the ADU pumps. The high
pressure spring covers the
range from 140 bar (2050 psi)
to 280 bar (4060 psi). The low
pressure spring is adjustable
from minimum pressure
through 140 bar (2050 psi).
Pressure Cut-off
Characteristics of
Pressure Compensa-
tor Control
at 49°C (120°F),
static conditions.
“K” Inlet
Gage Port
“B” Inlet
“F” Case Drain
“C” Outlet
To Load
See Model Code on Page 4 for
Spring (Pressure) Adjustment Ranges.
“K” Outlet
Gage Port
Change in
Pressure A
Outlet Pressure
Outlet Flow
Change
in Flow B
Q
P
+
+
Dynamic Response per SAE J745 (Using Swash Plate Position)
Response Recovery
(off stroke) (on stroke)
msec msec
ADU041 20 75
ADU049 20 75
ADU062 25 90
ADU080 26 75
Outlet Pressure
Outlet Flow
Q
P
Outlet Pressure
Outlet Flow
Q
P
Code C - Page 8Code A & B - Page 7
9EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Control Options
Torque Control
Torque Control
The 420 Torque Control limits the power input to the pump
preventing the engine from stalling while also optimizing the
use of the engine power.
When combined with Pressure Compensator Control and/or
Load Sense (refer to page 7) it will allow the 420 to remain
inside the power envelope of the Pressure Flow curve.
When the combination of pump flow and outlet pressure
moves outside the envelope, the pump displacement will
automatically be reduced.
This maximum setting is easily calculated using the
following steps:
1. Select the 420 pump displacement you intend to use
2. Identify the available engine horsepower (HP) and speed (rpm)
3. Calculate the torque limit required by the system using the
equations shown
4. Select the MAX torque setting from the table shown
Code Torque Setting 41CC 49CC 62CC 80CC
AA 40 Nm (350 in-lbs) ✓ ✓ — —
AB 51 Nm (450 in-lbs) ✓ ✓ — —
AC 62 Nm (550 in-lbs) ✓ ✓ ✓ —
AD 73 Nm (650 in-lbs) ✓ ✓ ✓ ✓
AE 85 Nm (750 in-lbs) ✓ ✓ ✓ ✓
AF 96 Nm (850 in-lbs) ✓ ✓ ✓ ✓
AG* 107 Nm (950 in-lbs) ✓ ✓ ✓ ✓
AH 119 Nm (1050 in-lbs) — ✓ ✓ ✓
AJ 130 Nm (1150 in-lbs) — ✓ ✓ ✓
AK 141 Nm (1250 in-lbs) — ✓ ✓ ✓
AL 153 Nm (1350 in-lbs) — — ✓ ✓
AM 164 Nm (1450 in-lbs) — — ✓ ✓
AN 175 Nm (1550 in-lbs) — — ✓ ✓
AP 186 Nm (1650 in-lbs) — — ✓ ✓
AR 198 Nm (1750 in-lbs) — — ✓ ✓
AT* 209 Nm (1850 in-lbs) — — ✓ ✓
AU 220 Nm (1950 in-lbs) — — ✓ ✓
* reference 62cc
0
10
20
30
40
50
0 1000 2000 3000 4000
Pressure (PSI)
Flow (GPM)
Power Curve*
35%
75%
Full Flow Pressure for
Torque Limit Setting
0
500
1000
1500
2000
2500
3000
0 1000 2000 3000 4000
Pressure (PSI)
Torque (lbf-in)
Torque Curve*
without Torque Control
with Torque Control
with Torque Control
35%
75%
62cc AT
62cc AG
Pressure
Limit
Setting
“F” Case
Drain
“B” Inlet
“C” Outlet
To Load
“J” Load
Sense
Signal Port
See Page 7 for Pressure Compensator
Control and Load Sense
Torque = Horsepower (HP) x 63025 Torque = Horsepower (KW) x 9550
(in-lbs) Engine RPM (Nm) Engine RPM
10 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
“J” Load Sense
Signal Port
“B” Inlet
“F” Case
Drain
“C” Outlet
To Load
Optional Bleed-down Orifice in
Code A or B with Control Special Feature "A".
Ø 0,4 mm (.015 In.). Orifice is Plugged for No
Bleed Down in Control Code A or B.
“K” Inlet
Gage Port
(Optional)
“K” Inlet
Gage Port
(Optional)
Control Options
Cold Start Valve
Cold Start Valve
The 420 Cold Start Valve
reduces pump start-up
torque by directing control
pressure to the outlet.
It is primarily used in cold
weather applications and
includes a 12 or 24 VDC
directional control valve
mounted between the pump
housing and compensator.
11EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU041
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
70
72
74
76
78
80
82
84
86
88
90
500 1000 1500 2000 2500 3000
Input Speed, rpm
Efficiency (%)
34 bar
(
500 psi
)
50 bar (700 psi)
68 bar
(
1000 psi
)
103 bar (1500 psi)
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
74
76
78
80
82
84
86
88
90
500 1000 1500 2000 2500 3000
Input Speed, rpm
Efficiency (%)
280 bar (4000 psi)
150 bar (2200 psi)
250 bar (3600 psi)
200 bar (2900 psi)
12 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
280 bar (4000 psi)
250 bar (3600 psi)
280 bar (2900 psi)
150 bar (2200 psi)
34 bar (500 psi)
50 bar (700 psi) 68 bar (1000 psi)
103
b
ar
(
1500 ps
i)
226 (2000)
181 (1600)
136 (1200)
90 (800)
45 (400)
0
Performance
ADU041
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
0
10
20
30
40
50
60
70
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Power, Kw (hp)
50 bar (700
p
si)
103 bar (1500 psi)
280 bar (4000 psi)
150 bar (2200 psi)
200 bar
(2900 psi)
250 bar
(3600 psi)
7.5 (10)
15 (20)
22.5 (30)
30 (40)
37.5 (50)
45 (60)
52 (70)
13EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU041
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
0
0.5
1
2
2.5
3
3.5
4
4.5
Case Flow, lpm (gpm)
280 bar (4060 psi) Torque
150 bar (2175 psi) Torque
150 bar (2175 psi) Case Flow
280 bar (4060 psi)
Case Flow
2.0 (.50)
4.0 (1.0)
6.0 (1.50)
8.0 (2.0)
11.3 (100)
22.5 (200)
33.8 (300)
45.0 (400)
5.6 (50)
0
50.5 (450)
39.4 (350)
28.0 (250)
16.9 (150)
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
0
0.25
0.5
1
1.25
1.5
1.75
2
Case Flow, lpm (gpm)
20 bar (290 psi)
11 bar (160 psi)
.56 (5)
1.13 (10)
1.69 (15)
2.25 (20)
2.81 (25)
3.38 (30)
3.94 (35)
4.50 (40)
1.0 (.25)
2.0 (.50)
3.0 (.75)
4.0 (1.0)
0
5
10
15
20
25
30
35
500 1000 1500 2000 2500 3000
Input Speed, rpm
Main Flow, lpm (gpm)
0
0.5
1
1.5
2
2.5
3
3.5
Case Flow, lpm (gpm)
280 bar
(
4000 psi
)
25 bar
(
365 psi
)
25 bar (365 psi)
280 bar (4000 psi)
19 (5)
28 (10)
57 (15)
76 (20)
95 (25)
115 (30)
134 (35)
1.9 (0.5)
3.8 (1.0)
14 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU049
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
70
72
74
76
78
80
82
84
86
88
90
500 1000 1500 2000 2500 3000
Input Speed, rpm
Efficiency (%)
34 bar (500 psi)
50 bar (700 psi)
68 bar (1000 psi)
103 bar (1500 psi)
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
74
76
78
80
82
84
86
88
90
500 1000 1500 2000 2500 3000
Input Speed, rpm
Efficiency (%)
280 bar (4000 psi)
150 bar (2200 psi)
200 bar (2900 psi)
250 bar (3600 psi)
15EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
0
500 1000 1500 2000 2500 3000
Input Speed, rpm
280 bar
(
4000 psi
)
250 bar (3600 psi)
280 bar (2900 psi)
150 bar (2200 psi)
34 bar (500 psi)
50 bar (700 psi) 68 bar (1000 psi)
103 bar (1500 psi)
Input Torque, Nm (in-lb)
271 (2400)
226 (2000)
181 (1600)
45 (400)
136 (1200)
90 (800)
Performance
ADU049
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
0
500 1000 1500 2000 2500 3000
Input Power, Kw (hp)
50 bar (700
p
si)
103 bar (1500 psi)
280 bar (4000
p
si
)
150 bar (2200 psi)
200 bar
(2900 psi)
250 bar
(3600 psi)
7.5 (10)
15 (20)
22.5 (30)
30 (40)
37.5 (50)
45 (60)
52 (70)
60 (80)
Input Speed, rpm
16 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
500 1000 1500 2000 2500 3000
Input Speed, rpm
Main Flow, lpm (gpm)
0
1
2
3
4
Case Flow, lpm (gpm)
95 (25)
115 (30)
34 bar (500
psi)
34 bar (500 psi)
280 bar (4000
psi)
280 bar (4000
psi)
19 (5)
28 (10)
57 (15)
76 (20)
134 (35)
153 (40)
1.9 (0.5)
3.8 (1.0)
Performance
ADU049
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
0
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
2.75
3
Case Flow, lpm (gpm)
11.3 (100)
22.5 (200)
33.8 (300)
45.0 (400)
56.3 (500)
67.5 (600)
1.0 (.25)
2.0 (.50)
3.0 (.75)
4.0 (1.0)
5.0 (1.25)
6.0 (1.50)
150 bar (2175 psi) Torque
150 bar (2175 psi) Case Flow
280 bar
(4060 psi) Case Flow
280 bar (4060 psi) Torque
0
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
0
1.25
1.5
1.75
2
2.25
Case Flow, lpm (gpm)
.56 (5)
1.13 (10)
1.69 (15)
2.25 (20)
2.81 (25)
3.38 (30)
3.94 (35)
4.50 (40)
5.06 (45)
1.0 (.25)
2.0 (.50)
3.0 (.75)
4.0 (1.0)
11 bar (160 psi)
20 bar (290 psi)
17EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU062
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
500 1000 1500 2000 2500 3000
Efficiency
(%)
68bar (1000
p
si)
103 bar (1500
p
si
)
17 bar (250 psi)
76
78
80
82
84
86
88
90
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Speed, rpm
Efficiency (%)
250 bar (3600 psi)
150 bar (2200 psi)
200 bar (2900 psi)
280 bar (4000 psi)
50 bar (700 psi)
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
500 1000 1500 2000 2500 3000
Efficiency
(%)
68bar (1000
p
si)
103 bar (1500
p
si
)
17 bar (250 psi)
76
78
80
82
84
86
88
90
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Speed, rpm
Efficiency (%)
250 bar (3600 psi)
150 bar (2200 psi)
200 bar (2900 psi)
280 bar (4000 psi)
50 bar (700 psi)
18 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
ADU062 - Input Torque Versus Speed
@ 49 Deg C (120 Deg F), Full Flow, and 1.0 bar (0 psi) Inlet
0
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
317 (2800)
271 (2400)
226 (2000)
181 (1600)
136 (1200)
90 (800)
45 (400)
280 bar (4000 psi)
250 bar (3600 psi)
200 bar (2900 psi)
150 bar (2200 psi)
103 bar (1500 psi)
69 bar (1000 psi)
34 bar (500 psi)
Performance
ADU062
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
25 bar
(365 psi)
Input Speed, rpm
ADU062 - Input Power Versus Speed 49º C (120º F),
Full Flow, and 1.0 bar (0 psi) Inlet
Input Power, kW (hp)
280 bar (4000 psi)
82 (110)
74.5 (100)
67 (90)
60 (80)
52 (70)
45 (60)
37.5 (50)
30 (40)
22.5 (30)
15 (20)
7.5 (10)
0
500 1000 1500 2000 2500 3000
250 bar
(3600 psi)
200 bar
(2900 psi)
150 bar
(2200 psi)
103 bar
(1500 psi)
19EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU062
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
ADU062 - Input Torque and Case Flow
Cut-off - 49 Deg C (120 Deg F)
0
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
0
Case Flow, lpm (gpm)
11.3 (100)
22.5 (200)
33.8 (300)
56.3 (500)
45.0 (400)
67.5 (600)
1.0 (.25)
2.0 (.50)
280 bar (4060 psi) Case Flow
150 bar (2175 psi) Case Flow
280 bar (4060 psi) Torque
150 bar (2175 psi) Torque
3.0 (.75)
4.0 (1.00)
5.0 (1.25)
6.0 (1.50)
ADU062 - Input Torque and Case Flow
Stand-by - 49 Deg C (120 Deg F)
0
500 1000 1500 2000 2500 3000
Input Speed, rpm
Input Torque, Nm (in-lb)
0
0.25
0.5
0.75
1
Case Flow, lpm (gpm)
.56 (5)
1.13 (10)
1.69 (15)
2.25 (20)
2.81 (25)
3.38 (30)
3.94 (35)
4.50 (40)
5.06 (45)
20 bar (290 psi)
11 bar (160 psi)
1.0 (.25)
2.0 (.50)
3.0 (.75)
4.0 (1.0)
0 0
30002500
25 bar (365 psi)
25 bar (365 psi)
280 bar
(4000 psi)
280 bar (4000 psi)
20001500
Input Speed, rpm
ADU062 - Delivery & Case Flow Versus Speed 49º C (120º F)
1000500
19 (5)
28 (10) 3.8 (1.0)
1.9 (0.5)
57 (15)
76 (20)
95 (25)
115 (30)
134 (35)
Main Flow, lpm (gpm)
Case Flow, lpm (gpm)
153 (40)
172 (45)
191 (50)
0
20 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU080
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
74
76
78
80
82
84
86
88
90
500 900700 13001100 17001500 21001900 2300
Input Speed, rpm
Efficiency (%)
172 bar (2500 psi)
207 bar (3000 psi)
138 bar (2000 psi)
70
76
74
72
78
80
82
84
86
88
90
500 900700 13001100 17001500 21001900 2300
Input Speed, rpm
Efficiency (%)
69 bar (1000 psi)
103 bar (1500 psi)
34 bar (500 psi)
Overall Efficiency Versus
Speed @ 49º C (120º F),
Full Flow, and 1.0 bar
(0 psi) Inlet
21EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Input Speed, rpm
Input Power, kW (hp)
0
400 600 1000 1400 1800 2200800 1200 1600 2000 2400
70 (93.9)
60 (80.5)
50 (67.1)
40 (53.6)
30 (40.2)
20 (26.8)
10 (13.4)
207 bar (3000 psi)
138 bar (2000 psi)
103 bar (1500 psi)
67 bar (1000 psi)
35 bar (500 psi)
172 bar (2500 psi)
Performance
ADU080
Input Torque Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
Input Power Versus Speed
@ 49º C (120º F), Full Flow,
and 1.0 bar (0 psi) Inlet
0
400 600 1000800 1200
1400
1600 1800 2000 2200 2400
Input Speed, rpm
Input Torque, Nm (lb-in)
350 (3098)
300 (2655)
250 (2213)
200 (1770)
150 (1328)
100 (885)
50 (443)
207 bar (3000 psi)
172 bar (2500 psi)
138 bar (2000 psi)
103 bar (1500 psi)
67 bar (1000 psi)
35 bar (500 psi)
22 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Performance
ADU080
Input Torque and Case Flow
Stand-by @ 49º C (120º F)
Input Torque and Case Flow
Cut-off @ 49º C (120º F)
Delivery and Case Flow
Versus Speed @ 49º C
(120º F)
0
500 900700 1100 1300 1500 1700 1900 2100 2300
Input Speed, rpm
Input Torque, Nm (lb-in)
0
Case Flow, lpm (gpm)
10 (89)
20 (177)
30 (266)
50 (443)
40 (354)
60 (531)
2 (0.5)
4 (1.1)
207 bar (3000 psi)
207 bar (3000 psi)
6 (1.6)
0
500 900 1100700 1300 1500 1700 1900 2100 2300
Input Speed, rpm
Input Torque, Nm (lb-in)
0
3 (0.8)
Case Flow, lpm (gpm)
1 (9)
2 (18)
3 (27)
4 (35)
5 (44)
6 (53)
7 (62)
8 (71)
1 (0.3)
2 (0.5)
20 bar (300 psi)
20 bar (300 psi)
1.0 (0.3)
1.5 (0.4)
0
230021001700 19001300 1500
Input Speed, rpm
1100700 900
20 (5.3)
40 (10.6)
60 (15.9)
80 (21.1)
100 (26.4)
120 (31.7)
Main Flow, lpm (gpm)
Case Flow, lpm (gpm)
140 (37.0)
160 (42.3)
180 (47.6)
0
500
0.5 (0.1)
35 bar (500 psi)
207 bar (3000 psi)
35 bar (500 psi)
207 bar (3000 psi)
23EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Suction Port
Pressure Port
A
A
146.1
5.75( )
76.1
3.00( )
97.3
3.83( )
77.5
3.05( )
191
7.52( )
2X 218
8.58( )
(Diagnostic
Port)
72.6
2.86( )
(Diagnostic
Port)
69.1
2.72( )
Ø101.6
4.00( )
9.4
.37( )
2X 13.6
.54( )
(Case Drain)
79.2
3.12( )
(Case Drain)
72.1
2.84( )
122.2
4.81( )
87.9
3.46( )
5.1
.20( )
110.2
(4.34)
46
1.81( )
(Case Drain)
72.1
2.84( )
2X Ø
14.2
.56( )
74.7
2.94( )
For Shaft Configuration
See Separate Shaft
Installation Drawing
For Compensator Configuration See Separate Compensator
Installation Drawing
Optional
Diagnostic
Port
Optional Case Drain
Pressure Port
Suction Port
Top Case Drain
Bottom Case Drain
191
7.52
( )
2X 218
8.58
( )
Ø
101.6
4.00
( )
9.4
.37
( )
87.9
3.46
( )
5.1
.20
( )
38.1
(1.50)
41.1
(1.62)
4X .500-13 UNC-2B .77 Min.
-4X .375-16 UNC-2B .57 Min.
Pump Installation
B-mount / Rear-ported
RH Rotation
View A – A LH Rotation
.81 [20.6]
Optional Diagnostic Port
192.6 [7.58]
.81 [20.6]
Optional Diagnostic Port
205.3 [8.08]
p. 22
P. 24
24 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
A
A
146.1
5.75( )
76.1
3.00( )
218.1
8.59( )
73.8
2.91( )
211.7
8.34( )
240.9
9.49( )
71.4
2.81( )
71.4
2.81( )
53.1
2.09( )
44.5
1.75( )
21.3
.84( )
(Diagnostic Port)251.4
9.90( )
(Diagnostic Port)238.5
9.39( )
2x Ø
14.2
.56( )
(Case Drain)
79.2
3.12( )
(Case Drain)
72.1
2.84( )
122.2
4.81( )
87.9
3.46( )
(Case Drain)
72.1
2.84( )
2x 13.6
.54( )
5.1
.20( )
101.6
4.00( )
9.4
.37( )
97.3
3.83( )
256.2
10.09( )
110.1
4.34( )
46
1.81( )
74.7
2.94( )
For Shaft
Configuration
See Separate Shaft
Installation Drawing
For Compensator Configuration
See Separate Compensator
Installation Drawing
Pressure Port
Optional Case Drain
Case Drain Top
Bottom Case Drain
Suction Port
Optional Suction Port
Optional
Diagnostic
Port
-4X .375-16 UNC-2B .57 Min.
4X .500-13 UNC-2B .77 Min.
Pump Installation
B-mount / Side-ported
View A – A LH Rotation
A
A
146.1
5.75( )
76.1
3.00( )
218.1
8.59( )
73.8
2.91( )
211.7
8.34( )
240.9
9.49( )
71.4
2.81( )
71.4
2.81( )
53.1
2.09( )
44.5
1.75( )
21.3
.84( )
(Diagnostic Port)251.4
9.90( )
(Diagnostic Port)238.5
9.39( )
2x Ø
14.2
.56( )
(Case Drain)
79.2
3.12( )
(Case Drain)
72.1
2.84( )
122.2
4.81( )
87.9
3.46( )
(Case Drain)
72.1
2.84( )
2x 13.6
.54( )
5.1
.20( )
101.6
4.00( )
9.4
.37( )
97.3
3.83( )
256.2
10.09( )
110.1
4.34( )
46
1.81( )
74.7
2.94( )
For Shaft
Configuration
See Separate Shaft
Installation Drawing
For Compensator Configuration
See Separate Compensator
Installation Drawing
Pressure Port
Optional Case Drain
Case Drain Top
Bottom Case Drain
Suction Port
Optional Suction Port
Optional
Diagnostic
Port
-4X .375-16 UNC-2B .57 Min.
4X .500-13 UNC-2B .77 Min.
RH Rotation
25EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
A
A
(Case Drain)
79.2
3.12( )
122.2
4.81( )
110
4.33( )
(Case Drain)
72.1
2.84( )
76.1
3.00( )
114.5
4.508( )
178.3
7.02( )
114.3
4.50( )
4x Ø
14.33
.564( )
2x Ø
17.5
.69( )
2x 230.7
9.08( )
12.4
.49( )
(Diagnostic
Port)
72.6
2.86( )
(Diagnostic
Port)
69.1
2.72( )
38.1
1.50( )
41.1
1.62( )
203.7
8.02( )
103.1
4.06( )
5.08
.20( )
Ø
127.0
5.00( )
For Compensator Configuration
See Separate Compensator
Installation Drawing
For Shaft Configuration
See Separate Shaft
Installation Drawing
Optional
Diagnostic
Port
Optional Case Drain
Bottom Case Drain
Suction Port
Pressure
Port
2x 15.4
.61( )
46
1.81( )
122.9
4.84( )
74.7
2.94( )
Top Case Drain
2x 230.7
9.08( )
12.4
.49( )
203.7
8.02( )
103.1
4.06( )
5.08
.200( )
4X .500-13 UNC-2B .77 Min.
-4X .375-16 UNC-2B .57 Min.
Pump Installation
C-mount / Rear-ported
RH Rotation
View A – A LH Rotation
]
Suction Port
Pressure Port
.81 [20.6]
Optional Diagnostic Port
192.6 [7.58]
.81 [20.6]
Optional Diagnostic Port
205.3 [8.08]
p. 22
P. 24
26 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
A
A
(Case
Drain)
79.2
3.12( )
122.2
4.81( )
110
4.33( )
(Case Drain)
72.1
2.84( )
76.1
3.00( )
114.5
4.508( )
178.3
7.02( )
114.3
4.50( )
4x Ø
14.33
.564( )
2x Ø
17.5
.69( )
Ø
127.0
(5.00)
2x 15.4
.61( )
12.4
.49( )
46
1.81( )
122.9
4.84( )
71.4
2.81( )
71.4
2.81( )
21.3
.84( )
44.5
1.75( )
53.1
2.09( )
74.7
2.94( )
(Diagnostic Port)251.2
9.89( )
(Diagnostic Port)264.1
10.40( )
230.8
(9.09
73.3
2.89( )
224.4
8.84( )
253.6
9.99( )
268.9
10.59( )
72.14
2.84( )
5.1
.20( )
103.1
4.06( )
Suction Port
Pressure Port
For Compensator
Configuration See Separate
Compensator Installation Drawing
For Shaft Configuration
See Separate Shaft
Installation Drawing
Case Drain Left
Case Drain Top
Case Drain Bottom
Optional
Suction
Port
Optional
Diagnostic
Port
-4X .375-16 UNC-2B .57 Min.
4X .500-13 UNC-2B .77 Min.
Pump Installation
C-mount / Side-ported
View A – A LH Rotation
A
A
(Case
Drain)
79.2
3.12( )
122.2
4.81( )
110
4.33( )
(Case Drain)
72.1
2.84( )
76.1
3.00( )
114.5
4.508( )
178.3
7.02( )
114.3
4.50( )
4x Ø
14.33
.564( )
2x Ø
17.5
.69( )
Ø
127.0
(5.00)
2x 15.4
.61( )
12.4
.49( )
46
1.81( )
122.9
4.84( )
71.4
2.81( )
71.4
2.81( )
21.3
.84( )
44.5
1.75( )
53.1
2.09( )
74.7
2.94( )
(Diagnostic Port)251.2
9.89( )
(Diagnostic Port)264.1
10.40( )
230.8
(9.09
73.3
2.89( )
224.4
8.84( )
253.6
9.99( )
268.9
10.59( )
72.14
2.84( )
5.1
.20( )
103.1
4.06( )
Suction Port
Pressure Port
For Compensator
Configuration See Separate
Compensator Installation Drawing
For Shaft Configuration
See Separate Shaft
Installation Drawing
Case Drain Left
Case Drain Top
Case Drain Bottom
Optional
Suction
Port
Optional
Diagnostic
Port
-4X .375-16 UNC-2B .57 Min.
4X .500-13 UNC-2B .77 Min.
RH Rotation
27EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
31.8
(1.25)
Ø19.33 (.761) 11 Tooth 30˚ Flat
Root Side Fit 16/32 Class 1
Internal Spine per SAE J498B
Accepts 11 Tooth 30˚ Flat Root
Side Fit 16/32 External Splines
per SAE J498B Class 1 or ANSI
B92.1 Class 5 with 31.8 (1.25)
Extension From Mounting Flange
Additional Units Driven by
This Spline Must Not
Require More Than 118.6 N–m
(88 Lbf–ft) of Torque
287.3 (11.31)
(11.31)
300.0
With Double Shaft Seal
and C-mount
Pump Installation
Thru-Drive SAE A
Ø
7.9
(.31)
82.63
±
0.02
3.253
±
.001)(
106.38
(4.188)
172.7
(6.80)
106.38
4.188( )
86.4
(3.40)
.375-16 UNC-2B
19
(.75)
Min
For Output Shaft Configuration
See Separate Output Shaft
Installation Drawing
Groove to Accept an
Cap as 568A Size 042
(1/16 X 3 1/4 ID) O-ring
3x .375-16
UNC-2A Thru
31.8
(1.25)
287.3 (11.31)
(11.31)
300.0
With Double Shaft Seal
and C-mount
Ø16.54 (.651) 9 Tooth 30˚ Flat
Root Side Fit 16/32 Class 5
Internal Spline per ANSI B92.1
Accepts 9 Tooth 30˚ Flat Root
Side Fit 16/32 External Splines
per SAE J498b Class 1 or ANSI
B92.1 Class 5 with 31.8 (1.25)
Extension From Mounting Flange
Additional Units Drive by
This Spline Must Not
Require More Than 74.6 N–m
(55 Lbf–ft) of Torque
Output Shaft
Installation 9T Spline
Maximum Torque
75 Nm (660 in-lbf)
Maximum Torque
119 Nm (1056 in-lbf)
Output Shaft
Installation 11T Spline
A Thru-Drive Cover
Plate Installation
106.38
(4.188)
106.38
(4.188)
2X 15.5
(.61)
9.5
(.38)
300.0
(11.81)
287.3
(11.31)
Optional
Mounting Position
With Double
Shaft Seal
28 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
287.3 (11.31)
300.0 (11.81)
With Double Shaft Seal
and C-mount
146.1 (5.75)
146.1 (5.75)
2X 20.6 (0.81)
9.7 (0.38)
46
1.81( )
Ø
25.5 (1.006) 15 Tooth 30° Flat
Root Side Fit 16/32 Internal
Spline per ASA B5.15-1960
Accepts 15 Tooth 30° Flat Root
Side Fit 16/32 External Splines
per SAE J498B Class 1 or ANSI
B92.1 Class 5 with 46 (1.81)
Extension From Mounting Flange
287.3 (11.31)
300.0 (11.81)
With Double Shaft Seal
and C-mount
Pump Installation
Thru-Drive SAE B
Ø
10.4
(.41)
101.68
±
0.02
(4.003
±
.001
)
146.1
5.75[ ]
172.7
6.80[ ]
146.1
5.75[ ]
86.4
3.40[ ]
4x .500-13 UNC-2B Thru
For Output Shaft Configuration
See Separate Output Shaft
Installation Drawing
Groove to Accept an
as 568A Size 045
(1/16 X 4 ID) O-ring
41.2
1.62[ ]
Ø22.5 (.886) 13 Tooth 30˚ Flat
Root Side Fit 16/32 Class 1
Internal Spline Per SAE J498B
Accepts 13
Tooth 30˚
Flat Root
Side Fit 16/32 External Splines
Per SAE J498B Class 1 or ANSI
B92.1 Class 5 with 41.2 (1.62)
Extension From Mounting Flange
287.3 (11.31)
300.0 (11.81)
With Double Shaft Seal
and C-mount
Output Shaft
Installation 13T Spline
Output Shaft
Installation 15T Spline
Maximum Torque
209 Nm (1850 in-lbf)
Maximum Torque
337 Nm (2987 in-lbf)
B Thru-Drive Cover
Plate Installation*
* Contact your Eaton Representative for this option.
29EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
5.7 (.22)
Seal Leakage Drain
(VHO Filter Optional)
Cross Section of Dual
Shaft Seal Assembly
Pump Installation
Dual Shaft Seal
B-Mount Dual Shaft Seal*
* Refer to C-Mount Pump installation drawings for port locations.
C-Mount Dual Shaft Seal*
30 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Control Installation
Load Sense and Pressure Compensator
Load Sense and Pressure
Compensator
131.9
5.19[ ]
108.5
4.27[ ]
146.1
5.75[ ]
69.9
2.75[ ]
92.3
3.63[ ]
74.3
2.93[ ]
172.5
6.79[ ]
176.6
[6.95]
With Double
Shaft Seal
Load Sense Port
31EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Control Installation
Pressure Compensator
Pressure Compensator
117.9
4.64[ ]
71.4
2.81[ ]
158.1
6.22[ ]
103.7
4.08[ ]
93.5
3.68[ ]
106.2
[4.18]
With Double
Shaft Seal
32 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Control Installation
Torque Control
148.59
(5.85)
74.67
(2.94)
262.12
(10.32)
Compensator/Control
Not Shown For Clarity
33EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Control Installation
Cold Start Valve
165.1
(6.50)
141.73
(5.58)
69.85
(2.75)
92.20
(3.63)
74.16
(2.92)
179.32
(7.06)
78.23
(3.08)
119.38
(4.70)
124.46
(4.90)
172.46
(6.79)
172.46
(6.79)
Load Sense Port
With Double
Shaft Seal Housing
Metri-pack 150 Option
Metri-pack 280 Option
Deutsch Option
136.90
(5.39)
71.37
(2.81)
157.98
(6.22)
151.13
(5.95)
78.23
(3.08)
119.63
(4.71)
45.46
(1.79)
93.47
(3.68)
93.47
(3.68)
With Double
Shaft Seal Housing
Flying Lead Coil
Shown
12 VDC
See Below
For Options
Optional Connectors
34 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
177.9
7.0 ][
190.6
[ 7.5 ]
With Double Seal Housing
and C-mount
Max Displacement
18
.71[ ]
25% of Max
Displacement
3.5
.14[ ]
20°
105.1
4.14[ ]
Compensator/Control
Not Shown For Clarity
Torque 20±5 Lbf·ft
After Adjusting
Max Displacement
Max Displacement is Reduced
By Approximately 5 to 6%
Per Clockwise Turn
External Manual
Stroke Adjustment
Maximum Stroke Limiter
35EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
A
A
0.8750
0.3100
1.1250
2.3410
0.9060
1.6880
0.9690
0.1570
.625-18 UNF-2A
125:1000
[1.500:12]
1.6 [63]
0.1256
0.2480
Section A-A
41.3
1.62[ ]
Ø21.737 (.8558) 13 Tooth 30º
Flat Root Side Fit
16/32 Class 5 Spline
per ANSI B92.1 (Modified)
Fits 13 tooth 30º Flat Root
Side Fit 16/32 Internal
Splines per SAE J498b
Class 1 or ANSI B92.1 Class 5
3
.12[ ]
24.6
(.97)
24.9
+.12
-.11
(.980
+.005
-.004
)
Ø 22.21±.01
(.874
+.001
-.000
)
6.31±.04
Key Width
(.248
+.001
-.002
)
41.3
(1.62)
3
.12[ )
28.6
(1.12)
28.16
+.11
-.12
(1.108
+.005
-.004
)
Ø25.393
+.007
-.006
(.9998
+.0002
-.0003
)
6.31±.04
Key Width
(.248
+.001
-.002
)
46
(1.81)
Input Shaft Options
01 Code 02 Code
03 Code 05 Code
Maximum Torque
209 Nm
(1850 in-lbf)
Maximum Torque
337 Nm
(2987 in-lbf)
Maximum Torque
209 Nm
(1850 in-lbf)
Maximum Torque
307 Nm
(2717 in-lbf)
36 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
46
1.81[ ]
Ø 24.912 (.9808) 15 Tooth 30º
Flat Root Side Fit
16/32 Class 5 Spline per
ANSI B92.1 (Modified)
Fits 15 tooth 30º Flat Root
Side Fit 16/32 Internal
Splines per SAE J498B
Class 1 or ANSI B92.1 Class 5
08 Code
32 Code
Input Shaft Options
33 Code 34 Code
2.1850
Ø 31.224 (1.2293) 14 Tooth 30°
Flat Root Side Fit 12/24 Class 5
Spline per ANSI B92.1 (Modified)
Fits 14 Tooth Flat Root Side Fit
12/24 Internal Splines per SAE
J498B Class 1 or ANSI B92.1
Class 5
0.3110
2.1850
1.3120
0.1940
1.2450
1.3800
1.8120
R0.6302
1.1600
1/4-20 UNC-2B
16
(.63)
Ø 24.912 [.9808] 15 Tooth 30° Flat Root Side Fit
16/32 Class 5 Spline per ANSI B92.1 (Modified)
Maximum Torque
397 Nm
(3514 in-lbf)
Maximum Torque
640 Nm
(5660 in-lbf)
Maximum Torque
450 Nm
(3980 in-lbf)
Maximum Torque
397 Nm
(3514 in-lbf)
37EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
35 Code
38 Code
Input Shaft Options
2.1850
Ø 31.224 (1.2293) 14 Tooth 30°
Flat Root Side Fit 12/24 Class 5
Spline per ANSI B92.1 (Modified)
Fits 14 Tooth Flat Root Side Fit
12/24 Internal Splines per SAE
J498B Class 1 or ANSI B92.1
Class 5
A
A
2.9040
1.9380
1.2190
1.2492
1.3750
0.3100
125:1000
[1.500:12]
1.6 [63]
Ø3.99 Thru
[.157]
1.000-12 UNF-2a
0.1609
0.3125
Section A-A
Maximum Torque
640 Nm
(5660 in-lbf)
Maximum Torque
450 Nm
(3980 in-lbf)
38 EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Center of Gravity
Rear Port Side Port Thru-Drive Length Dual Seal
Lcg L3 L4 Lcg L3 L4 Lcg L3 L4 Lt Lds
ADU041 109.6 (4.31) 9.6 (0.38) 2.9 (0.11) 114.7 (4.51) 9.2 (0.36) 2.4 (0.10) 131.5 (5.18) 8.2 (0.32) 2.1 (0.08) 287.3 (11.31) 13.0 (0.50)
ADU049 109.6 (4.31) 9.6 (0.38) 2.9 (0.11) 114.7 (4.51) 9.2 (0.36) 2.4 (0.10) 131.5 (5.18) 8.2 (0.32) 2.1 (0.08) 287.3 (11.31) 13.0 (0.50)
ADU062 109.9 (4.32) 9.4 (0.37) 2.9 (0.11) 114.9 (4.52) 9.0 (0.35) 2.4 (0.10) 131.3 (5.17) 8.0 (0.31) 2.1 (0.08) 287.3 (11.31) 13.0 (0.50)
ADU080 109.9 (4.32) 9.4 (0.37) 2.9 (0.11) 114.9 (4.52) 9.0 (0.35) 2.4 (0.10) 131.3 (5.17) 8.0 (0.31) 2.1 (0.08) 287.3 (11.31) 13.0 (0.50)
Dimensions in mm (in)
Examples: Calculation L
1
and L
2
Tandem ADU062 Thru-drive with ADU041 Rear Ported
L
1
= Lcg 131.3mm (5.17 inches)
L
2
= Lt + Lcg 287.3mm + 109.6mm = 396.9mm (15.6 inches)
Tandem Dual Seal ADU049 Thru-drive with ADU049 Side Ported
L
1
= Lcg + Lds 131.5mm + 13mm = 144.5mm (5.69 inches)
L
2
= Lt + Lds + Lcg 287.3mm + 13mm + 114.7mm =
415mm (16.34 inches)
Tandem Pump Applications
Eaton recommends that tandem pump applications be provided
with additional support to limit overhung loading of the mounting
flange. The thru-drive alternate attachment points on the rear flange
may be used with a customer designed support.
L1
L2
L3
L4
Lt
39EATON 420 Mobile Piston Pump Technical Manual E-PUPI-TM002-E3 September 2009
Fluid Cleanliness
The 420 Series pumps are
rated in anti-wear petroleum
fluids with a contamination
level of 21/18/13 per ISO
4066. Operation in fluids with
levels more contaminated
than this is not recommend-
ed. Fluids other than petro-
leum, severe service cycles,
or temperature extremes
are cause for adjustment of
these codes. Please contact
your Eaton Representative
for specific duty cycle recom-
mendation.
Eaton 420 Series pumps, as
with any variable displace-
ment piston pumps, will op-
erate with apparent satisfac-
tion in fluids up to the rating
specified here. Experience
has shown however, that
pump and hydraulic system
life is not optimized with high
fluid contamination levels
(high ISO cleanliness codes).
Proper fluid condition is
essential for long and
satisfac tory life of hydraulic
components and systems.
Hydraulic fluid must have the
correct balance of cleanli-
ness, materials, and additives
for protection against wear
of components, elevated
viscosity and inclusion of air.
Essential information on the
correct methods for treating
hydraulic fluid is included
in Eaton publication 561 –
“Eaton Guide to Systemic
Contamination Control”
– available from your local
Eaton distributor. In this pub-
lication, filtration and cleanli-
ness levels for extending the
life of axial piston pumps and
other system components
are listed. Included is an
excellent discussion of the
selection of products needed
to control fluid condition.
Installation
and Start-up
Warning: Care should be
taken that mechanical and
hydraulic resonances are
avoided in the application of
the pump. Such resonances
can seriously compromise
the life and/or safe operation
of the pump.
Drive Data
Mounting attitude should be
horizontal using the appro-
priate case drain ports to
ensure that the case remains
full of fluid at all times.
Consult your local Eaton
Representative if a different
arrangement is required.
In those cases where geo-
metric tolerances of mount-
ing are critical, or where
specific tolerance ranges are
required and not specified,
consult Eaton Engineering for
specific limits.
Direction of shaft rotation,
viewed from the prime mov-
er end, must be as indicated
in the model designation on
the pump – either right hand
(clockwise) or left hand
(counterclockwise).
Direct coaxial drive through
a flexible coupling is recom-
mended. If drives imposing
radial shaft loads are con-
sidered, please consult your
Eaton Representative.
Start-up Procedure
Make sure the reservoir and
circuit are clean and free of
dirt/debris prior to filling with
hydraulic fluid.
Fill the reservoir with filtered
oil and fill to a level sufficient
enough to prevent vortexing
at the suction connection to
pump inlet. It is good practice
to clean the system by flush-
ing and filtering, using an
external slave pump.
Caution: Before the pump is
started, fill the case through
the uppermost drain port
with hydraulic fluid of the
type to be used. The case
drain line must be connected
directly to the reservoir
and must terminate below
the oil level.
Once the pump is started,
it should prime within a few
seconds. If the pump does
not prime, check to make
sure that there are no restric-
tions between the reservoir
and the inlet to the pump,
and that the pump is being
rotated in the proper direc-
tion, and that there are no air
leaks in the inlet line and con-
nections. Also check to make
sure that trapped air can
escape at the pump outlet.
After the pump is primed,
tighten the loose outlet con-
nections, then operate for
five to ten minutes (unload-
ed) to remove all trapped air
from the circuit.
If the reservoir has a sight
gage, make sure the fluid is
clear – not milky.
© 2009 Eaton Corporation
All Rights Reserved
Printed in USA
Document No. E-PUPI-TM002-E3
Supersedes E-PUPI-TM002-E2
September 2009
Eaton
Hydraulics Group USA
14615 Lone Oak Road
Eden Prairie, MN 55344
USA
Tel: 952-937-9800
Fax: 952-294-7722
www.eaton.com/hydraulics
Eaton
Hydraulics Group Europe
Route de la Longeraie 7
1110 Morges
Switzerland
Tel: +41 (0) 21 811 4600
Fax: +41 (0) 21 811 4601
Eaton
Hydraulics Group Asia Pacific
Eaton Building
4th Floor, No.3 Lane280 Linhong Rd.
Changning District
Shanghai 200335
China
Tel: (+86 21) 5200 0099
Fax: (+86 21) 5200 0400
