The robust axial piston pumps of series DPVG have
been developed especially for use in mobile machinery
for tough environmental conditions.
The swash plate design with large pivoting angle is ideal
for applications that require variable delivery volume.
The DPVG basic pump, thanks to a sophisticated
modular system, can be combined with any
of the various regulators, mounting flanges, and shaft
ends.
A through-drive is possible, as is the configuration of
two DPVG pumps into a multi-circuit pump in tandem
design.
Applies to:
DPVG 085
DPVG 108
DPVG 165
DPVG 280
Features:
Closed-loop circuit
Series D
Nominal pressure p
N
= 450 bar
Maximum pressure p
max
= 500 bar
Various regulation types available
Document identification:
ID number: 11357580
Issue: 12/2014
Applies to: DPVG 085 to 280
Authors: Liebherr - Departments MD3 / HR1
Version: 1.0
Axial piston pump with variable
displacement volume: DPVG
Data sheet
Table of Contents
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
2
1 Type code 3
2 Technical data 5
2.1 Table of values 5
2.2 Rotation direction 6
2.3 Permissible pressure range 6
2.4 Shaft seal 7
2.5 Housing flushing 8
2.6 Feed pump 9
2.7 Hydraulic fluids 10
3 Actuation and regulation types 14
3.1 Regulation types 14
3.2 Hydraulic diagrams 15
3.3 Regulation functions 28
4 Installation conditions 37
4.1 Installation variant 38
4.2 Installation position 39
5 Dimensions 40
5.1 NG 085 (independent of the rotation direction) 40
5.2 NG 108 (independent of the rotation direction) 45
5.3 NG 165 (independent of the rotation direction) 50
5.4 NG 280 (independent of the rotation direction) 55
5.5 Shaft end dimensions, NG 085 to 280 60
5.6 Through-drive dimensions 62
5.7 Multi-circuit pump in tandem design 65
1 Type code
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
3
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
1. Pump type
Series D / pump / variable-displacement DPV
2. Circuit type
closed G
3. Nominal value (NG) = Displacement volume V
g max
in cm
3
NG 085 108 165 280
4. Remaining delivery volume V
g
min
cm
3
000
5. Actuation / Regulation type
Electro-proportional o x x x EL
Electro-proportional / pressure cut-off o x x x EL - DA
Electro-proportional/ pressure cut-off** o o o o EL - DA1
Electro-proportional with safety valve o o o o ELS
Electro-proportional with safety valve / pressure cut-off x o o o ELS - DA
Electro-proportional with safety valve / pressure cut-off** o o o o ELS - DA1
Hydraulic proportional o o o o SD
Hydraulic proportional / pressure cut-off o o o o SD - DA
Hydraulic proportional / pressure cut-off** o o o o SD - DA1
Electric torque control / pressure cut-off x o x x TCE
Hydraulic torque control / pressure cut-off x o o o TCH
6. Design
1
7. Direction of rotation with view of the drive shaft
Right x x x x R
Left x x x x L
8. Mounting flange
Diesel-engine flange SAE J617
SAE 1 o o o o 11
SAE 2 o x o o 12
SAE 3 o o o o 13
SAE 4 o o o o 14
Mounting flange SAE J744
SAE C x - - - 23
SAE D - x - - 24
SAE E - - o x 25
Mounting flange ISO 3019-2
160 x - - - 31
180 - x - - 31
200 - - x - 31
224 - - - x 31
9. Shaft end
Splined shaft according to
DIN 5480* x x x x 1
ANSI B92.1a x o o o 2
1 Type code
1 Type code
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
4
*) Preferred program
**) With override
x Available
o Upon request
- Not technically possible
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
10. Connections (SAE J518)
High-pressure connection 6000 PSI A
11. Accessories
Without x x x x O
12. Feed pump
Without feed pump x x x x 00
With feed pump (V
g
= 24 cm
3
), without filter and cold-start valve
x o - - 24
With feed pump (V
g
= 30 cm
3
), without filter and cold-start valve
o o - - 30
With feed pump (V
g
= 40 cm
3
), without filter and cold-start valve
- o o - 40
With feed pump (V
g
= 50 cm
3
), without filter and cold-start valve
- - x o 50
With feed pump (V
g
= 24 cm
3
), mounted filter and cold-start valve
x - - - 24F
13. Through-drive
Standard
Centering diameter
Position of the fastening
screw thread
according to SAE
Gearing ANSI B92.1a 085 108 165 280
- - - o o o o 0000
Ø101.6
SAE B
Type K Basic (2 Hole)
7/8 in 13T 16/32DP
x x o x B11D
Type S Basic (4 Hole) o o o - B12D
SAE BB
Type K Basic (2 Hole)
1 in 15T 16/32DP
x x x x B21D
Type S Basic (4 Hole) o o o - B22D
Ø127
SAE C
Type K Basic (2 Hole)
1 1/4 in 14T 12/24DP
o x o x C11D
Type S Basic (4 Hole) - x o x C12D
SAE CC
Type K Basic (2 Hole)
1 1/2 in 17T 12/24DP
- x x o C21D
Type S Basic (4 Hole) - x o o C22D
Ø152.4 SAE D
Type K Basic (2 Hole)
1 3/4 in 13T 8/16DP
- o o o D11D
Type S Basic (4 Hole) - o o x D12D
Ø165.1 SAE E
Type K Basic (2 Hole)
1 3/4 in 13T 8/16DP
- - - o E11D
Type S Basic (4 Hole) - - - x E12D
14. valve
High-pressure limitation valve with feed function and feed-pressure valve x o x x NS-DB-DS
15. Sensor system
Without sensor x x x x 0
Angle sensor = W o o o o W
Note
Contact addresses for queries can be found on the reverse side of this document.
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
5
2.1 Table of values
**) M
E perm
for shaft end ANSI B92.1a has to be taken into account
T1*) M
max
, for simultaneous p
max
and V
g max
Note
The values provided (maximum data) are theoretical values, rounded, without efficiencies and tolerances.
Nominal values 085 108 165 280
Displacement volumes
V
g max
cm
3
85.2 107.7 167.8 283.4
Max. speed for V
g max
n
max
rpm 3300 3000 2700 2500
Volumetric flow rate for n
max
and V
g max
qv
max
l/min 281 323 453 709
Drive power for qv
max
and Δp = 450 bar p
max
kW 211 242 340 531
Torque for V
g max
and Δp = 450 bar M
max
Nm 610 771 1202 2030
Torsional stiffness
Shaft DIN 5480 Nm/rad 103003 181227 229871 431105
Shaft ANSI B92.1a-1976 1 1/4
IN 14T 12/24 DP
Nm/rad 78269 - - -
Mass moment of inertia of the drive
J
TW
kgm
2
0.0101 0.017 0.03 0.0693
Mass (approx.) m kg 54 69 96 134
Permissible radial and axial load of the drive shaft
Max. radial force
F
q max
N
The permissible forces result from the
load collective. Please consult us if a belt
drive is planned.
Max. axial force
F
a± max
N - - - -
Permissible input and through-drive torques
Max. input torque for shaft end
DIN 5480
M
E perm
Nm - - 1950 -
Max. input torque for shaft end
ANSI B92.1a
M
E perm
Nm - - - -
Max. through-drive torque
M
D perm
Nm - - 1950 -
2 Technical data
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
6
2.2 Rotation direction
2.3 Permissible pressure range
2.3.1 Operating pressure
Connection “A / B”
Pressure at working port “A” or “B”: Nominal pressure p
N
= 450 bar (not fatigue critical) /
Maximum pressure p
max
= 500 bar (short term)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
The direction of rotation is provided with a view of the drive
shaft, as depicted in the illustration.
Right = clockwise
Left = counterclockwise
Note
Definition of short term, unless stated otherwise: t < 1s, t
total
= 3ooBh.
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
7
2.3.2 Minimum operating pressure = feed pressure
In order to guarantee sufficient lubrication in the driving gear in all swivel angles during operation, there must be
a pressure applied in the operating circuit, for example measured at M1 or M2, at V
g max
and V
g min,
of at least
pHD
min
= 20 bar.
The values depend on external circumstances, such as the type of hydraulic fluid used or the temperature, and they
must be individually calculated for each use. Values upon request.
2.3.3 Housing pressure, leakage-oil pressure
The housing or leakage-oil pressure pL must not exceed the maximum values. For boundary values, See chapter 2.4.3.
The number of leakage-oil connections T can vary depending on the application.
2.4 Shaft seal
2.4.1 General
The radial shaft seals (RWDR) from Liebherr are special sealing elements that allow a specific housing pressure. In
order to ensure that the tribological system functions optimally, the operating conditions must be observed. See
chapter 2.4.3
Depending on the peripheral speed, oil temperature, lubricant, and pressure buildup in the housing, the sealing-
edge temperature can be approx. 20° to 40°C above the leakage-oil temperature of a hydraulic axial piston unit.
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
8
2.4.2 Temperature range
The FKM radial shaft seal is permissible for housing temperatures of -25°C to +115°C.
Please consult us in case of use below -25°C.
2.4.3 Permissible pressure load for hydraulic pumps
The service life of the RWDR is influenced by the speed “n” of the axial piston unit and the leakage-oil pressure “pL.”
The constant leakage-oil pressure “pL” should not exceed 3 bar abs. for operating temperature. The max. permis-
sible leakage-oil pressure is 6 bar absolute for reduced speed (see diagram).
Short-term pressure peaks of max. 10 bar abs. are allowed (t < 0.1 s) in the short term. The more pressure peaks
that occur, the shorter the service life of the shaft seal. The pressure in the axial piston unit must always be higher
than the outer pressure on the shaft seal.
2.5 Housing flushing
Under various operating conditions, such as a very low flow over a longer period of time, a boundary value increase
in temperature could occur in the housing. See chapter 2.7
In this case, the housing must be flushed in such a manner that the “hot” hydraulic fluid is conveyed to an external
cooler, cooled there, and fed back into the hydraulic system.
The flushing quantity qV in l/min has to be individually set for each nominal value in connection with the application
and is the responsibility of the manufacturer of the device or system.
Shaft diameter (mm) Nominal value
40 085
45 108
50 165
60 280
Permissible pressure p
abs.
max. in bar
Speed n in rpm
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
9
2.6 Feed pump
1- Feed pump
2.6.1 Hydraulic diagram with feed pump
1- Feed pump
2- Feed pump, incl. mounted filter and cold-start valve
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
Note
A feed pump can only be realized in combination with through-drive = B11D or 0000.
A jointly used feed pump on hydraulic pump 2 is recommended for multi-circuit pumps in tandem design,
see chapter 5.7.
Not part of the
scope of delivery
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
10
2.7 Hydraulic fluids
2.7.1 General
The selection of the suitable hydraulic fluid is substantially influenced by the expected operating temperature de-
pending on the ambient temperature that is equivalent to the tank temperature.
Use the comparative oil values for the selection of the suitable hydraulic fluid. See chapter 2.7.5
2.7.2 Operating limits
Depending on the operating temperature, the appropriate oil must be selected taking into account the viscosity
characteristics according to the following conditions:
- Cold start: max. approx. 1600 mm
2
/s *)
- Normal operation: at or above approx. 500 mm
2
/s *)
- Optimal range of application: 16-36 mm
2
/s *)
- At max. leakage-oil temperature, the viscosity must not be below 8 mm
2
/s (short term, meaning < 3 min., 7mm
2
/s).
- The shear stability (KRL) has to be observed for multigrade oils.
*) In reference to the tank temperature
In addition to the viscosity characteristics, the Liebherr GSP specification ID No. 10465804 must be observed.
2.7.3 Filling quantity
The required filling quantity can be customized; values upon request.
2.7.4 Filtering
- To maintain the specified purity class “21/17/14 according to ISO 4406” under all circumstances,
it is necessary to filter the hydraulic fluid.
- The hydraulic fluid is filtered by means of the device-specific use of oil filters in the hydraulic system.
- Cleaning and maintenance intervals of the oil filter, with respect to the entire oil circuit, depend on the
device usage, and they are to be found in the device-specific operating manual.
Note
The hydraulic unit must be filled with oil and bled prior to initialization.
This must be inspected during operation and after longer standstills, and it must be repeated as
necessary!
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
11
2.7.5 Comparative oil values
*) Preheating is absolutely necessary at temperatures below -25°C.
**) Applicable to Liebherr Mining Excavators: -40°C to +45°C (at temperatures below -25°C, the appropriate
Liebherr Arctic Kit must be used).
***)Preheating is absolutely necessary at temperatures below -40°C.
1
) Applicable to Liebherr Mining Excavators: -50°C to +30°C (at temperatures below -30°C, the appropriate
Liebherr Arctic Kit must be used).
2
) For use in automatic transmissions.
3
) For use in cranes.
4
) For use in Liebherr cranes.
Oil grade
Outdoor
operating
temperature
°
C
Density at 15°C
kg/m
3
Viscosity
class
ISO VG
Kinematic
viscosity at
40 / 100°C
mm²/s
Pour point
°
C
Liebherr Hydraulic Basic 68 -10 to +45 882 68 68 / 8.7 -24
Liebherr Hydraulic Basic 100 +/- 0 to +55 882 100 100 / 11.5 -18
Liebherr Hydraulic HVI -20 to +40 877 46 (32-68) 46 / 8.3 -39
Liebherr Hydraulic Plus -25*) to +45 +**) 838 46 (32-68) 46 / 9.5 -45
Liebherr Hydraulic Plus Arctic
-40***) to +30 +
1
)
828 15-46 7/25/2004 < -54
Liebherr Hydraulic Gear ATF
(-40 to +50)
2
) +
3
)
877 - 39 / 7.2 -45
Liebherr Hydraulic 37
(-25 to +50)
4
)
870 32-46 37 / 7.2 -39
Liebherr Hydraulic FFE 30
(-40 to +50)
4
)
844 15-46 7/28/2005 < -51
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
12
2.7.6 Viscosity diagrams
Designation
Kinematic viscosity in mm
3
/s
Kinematic viscosity in mm
3
/s
Temperature in ºC
2 Technical data
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
13
Designation
Kinematic viscosity in mm
3
/s
Kinematic viscosity in mm
3
/s
Temperature in ºC
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
14
3.1 Regulation types
Applicable to all regulation types:
The following actuation and regulation types designed according to the modular principle can be ordered for the
DPVG series:
3.1.1 pressure regulator
- SD regulation, see chapter 3.2.1
- SD- DA regulation, see chapter 3.2.2
- SD- DA1 regulation, see chapter 3.2.3
- TCH regulation, see chapter 3.2.4 / see chapter 3.2.5
3.1.2 Electronic regulator
- EL regulation, see chapter 3.2.6
- EL- DA regulation, see chapter 3.2.7
- EL- DA1 regulation, see chapter 3.2.8
- ELS regulation, see chapter 3.2.9
- ELS- DA regulation, see chapter 3.2.10
- ELS- DA1 regulation, see chapter 3.2.11
- TCE regulation, see chapter 3.2.12 / see chapter 3.2.13
Additional types of regulation are available upon request.
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
Note
Only one nominal value is illustrated per regulation type or function, primarily based on the nominal value
280.
Special applications and custom-made productions are not listed in this section.
Always use the information from the delivered installation drawing or consult with Liebherr.
DANGER
The spring-guided return in the regulating valve is not a safety device!
Impurities in the hydraulic system such as wear or residual contamination from device or system compo-
nents can result in blockages in undefined places of the various regulator components.
Under certain circumstances, machine operator requirements can no longer be realized.
The realization of a safety device, such as an Emergency-Off, is the responsibility of the manufacturer of
the device or system.
3 Actuation and regulation types
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
15
3.2 Hydraulic diagrams
3.2.1 SD regulation
Abbreviation Designation Abbreviation Designation
X1, X2 Control-pressure connection ISO 9974-1 T2 Oil drainage ISO 9974-1
A, B Working ports SAE J 518 T3 Return feed pressure ISO 9974-1
R1 Vent connection ISO 9974-1 M1, M2 High-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
T1 Leakage-oil connection ISO 9974-1
Note
X1 switched, direction of rotation: R = Oil leak in connection A, direction of rotation: L = Oil leak in connection B
X2 switched, direction of rotation: R = Oil leak in connection B, direction of rotation: L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
16
3.2.2 SD - DA regulation
Abbreviation Designation Abbreviation Designation
X1, X2 Control-pressure connection ISO 9974-1 T2 Oil drainage ISO 9974-1
A, B Working ports SAE J 518 T3 Return feed pressure ISO 9974-1
R1 Vent connection ISO 9974-1 M1, M2 High-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
T1 Leakage-oil connection ISO 9974-1
Note
X1 switched, direction of rotation: R = Oil leak in connection A, direction of rotation: L = Oil leak in connection B
X2 switched, direction of rotation: R = Oil leak in connection B, direction of rotation: L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
17
3.2.3 SD - DA1 regulation
Abbreviation Designation Abbreviation Designation
X1, X2 Control-pressure connection ISO 9974-1 T1 Leakage-oil connection ISO 9974-1
Y DA1 override signal T2 Oil drainage ISO 9974-1
A, B Working ports SAE J 518 T3 Return feed pressure ISO 9974-1
R1 Vent connection ISO 9974-1 M1, M2 High-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
Note
X1 switched, direction of rotation: R = Oil leak in connection A, direction of rotation: L = Oil leak in connection B
X2 switched, direction of rotation: R = Oil leak in connection B, direction of rotation: L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
18
3.2.4 TCH regulation, direction of rotation left
Abbreviation Designation Abbreviation Designation
X1, X2 Control-pressure connections ISO 9974-1 T1, T2 Leakage-oil connections ISO 9974-1
A, B Working ports SAE J 518 T3 Return feed pressure ISO 9974-1
R1 Vent connection ISO 9974-1 M1, M2 High-pressure measuring connections ISO 9974-1
Y
DA1 override signal
M4, M5 Actuating-pressure measuring connections ISO 9974-1
S Feed-pump suction connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1
Note
X1 switched, direction of rotation: L = Oil leak in connection B
X2 switched, direction of rotation: L = Oil leak in connection A
Not part of the scope of delivery
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
19
3.2.5 TCH regulation, direction of rotation right
Abbreviation Designation Abbreviation Designation
X1, X2 Control-pressure connections ISO 9974-1 T3 Return feed pressure ISO 9974-1
A, B Working ports SAE J 518 M1, M2 High-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
Y
DA1 override signal
M6, M7 Control-pressure measuring connections ISO 9974-1
T1, T2 Leakage-oil connections ISO 9974-1 Fa Feed-pressure connection ISO 9974-1
Note
X1 switched, direction of rotation: R = Oil leak in connection A
X2 switched, direction of rotation: R = Oil leak in connection B
Not part of the scope of delivery
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
20
3.2.6 EL regulation
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T2 Oil drainage ISO 9974-1
A, B Working ports SAE J 518 T3 Return feed pressure ISO 9974-1
R1 Vent connection ISO 9974-1 M1, M2 High-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
T1 Leakage-oil connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: R = Oil leak in connection A, L = Oil leak in connection B
Solenoid E2 switched, direction of rotation: R = Oil leak in connection B, L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
21
3.2.7 EL - DA regulation
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T2 Tank connection ISO 9974-1
A, B Working ports SAE J 518 T3 Return feed pressure ISO 9974-1
R1 Vent connection ISO 9974-1 M1, M2 High-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
T1 Flushing connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: R = Oil leak in connection A, L = Oil leak in connection B
Solenoid E2 switched, direction of rotation: R = Oil leak in connection B, L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
22
3.2.8 EL - DA1 regulation
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T3 Return feed pressure ISO 9974-1
E5
Angle-of-rotation sensor according to ISP
ID No. 11118356 3-pin connector,
DT04-3P Deutsch company
M1, M2 High-pressure measuring connections ISO 9974-1
A, B Working ports SAE J 518 M4, M5 Actuating-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 Y DA1 override signal ISO 9974-1
T1, T2 Tank connection ISO 9974-1
Note
Solenoid E1 swSolenoiditched, direction of rotation: R = Oil leak in connection B, L = Oil leak in connection A
Solenoid E2 switched, direction of rotation: R = Oil leak in connection A, L = Oil leak in connection B
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
23
3.2.9 ELS regulation
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T1, T2 Tank connection ISO 9974-1
E3, E4
Stop valve, plug connection: Deutsch
connector DT04-2P, IG=0.58 A-100% ED
EN=24V, R=25 Ohm
T3 Return feed pressure ISO 9974-1
E5
Angle-of-rotation sensor according to ISP ID
No. 11118356 3-pin connector, DT04-3P
Deutsch company
M1, M2 High-pressure measuring connections ISO 9974-1
A, B Working ports SAE J 518 M4, M5 Actuating-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: R = Oil leak in connection A, L = Oil leak in connection B
Solenoid E2 switched, direction of rotation: R = Oil leak in connection B, L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
24
3.2.10 ELS - DA regulation
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T1, T2 Tank connection ISO 9974-1
E3, E4
Stop valve, plug connection: Deutsch
connector DT04-2P, IG=0.58 A-100% ED
EN=24V, R=25 Ohm
T3 Return feed pressure ISO 9974-1
E5
Angle-of-rotation sensor according to ISP ID
No. 11118356 3-pin connector, DT04-3P
Deutsch company
M1, M2 High-pressure measuring connections ISO 9974-1
A, B Working ports SAE J 518 M4, M5 Actuating-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: R = Oil leak in connection A, L = Oil leak in connection B
Solenoid E2 switched, direction of rotation: R = Oil leak in connection B, L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
25
3.2.11 ELS - DA1 regulation
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, AMP Junior Timer plug,
2 pin, PWM= 100Hz,
E= 24V, Imax.= 750mA
T3 Return feed pressure ISO 9974-1
E3, E4
Stop valve, plug connection: Deutsch
connector DT04-2P, IG=0.585 A-100% ED
EN=24V, R=25 Ohm
M1, M2 High-pressure measuring connections ISO 9974-1
A, B Working ports SAE J 518 M4, M5 Actuating-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 Y DA1 override signal ISO 9974-1
T1, T2 Tank connection ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: R = Oil leak in connection A, L = Oil leak in connection B
Solenoid E2 switched, direction of rotation: R = Oil leak in connection B, L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
26
3.2.12 TCE regulation, direction of rotation left
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T1, T2 Tank connection ISO 9974-1
E3, E4
Stop valve, plug connection: Deutsch
connector DT04-2P, IG=0.58 A-100% ED
EN=24V, R=25 Ohm
T3 Oil-return feed-pressure valve ISO 9974-1
A, B Working ports SAE J 518 M1, M2 High-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: L = Oil leak in connection B
Solenoid E2 switched, direction of rotation: L = Oil leak in connection A
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
27
3.2.13 TCE regulation, direction of rotation right
Abbreviation Designation Abbreviation Designation
E1, E2
Pressure-relief valve, plug connection AMP
Junior Timer, 2 pin, PWM= 100Hz,
En= 24V, Imax.= 750mA
T1, T2 Tank connection ISO 9974-1
E3, E4
Stop valve, plug connection: Deutsch
connector DT04-2P, IG=0.58 A-100% ED
EN=24V, R=25 Ohm
T3 Oil-return feed-pressure valve ISO 9974-1
A, B Working ports SAE J 518 M1, M2 High-pressure measuring connections ISO 9974-1
R1 Vent connection ISO 9974-1 M4, M5 Actuating-pressure measuring connections ISO 9974-1
Fa Feed-pressure connection ISO 9974-1 M6, M7 Control-pressure measuring connections ISO 9974-1
Note
Solenoid E1 switched, direction of rotation: R = Oil leak in connection A
Solenoid E2 switched, direction of rotation: R = Oil leak in connection B
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
28
3.3 Regulation functions
- SD function / Control-pressure proportional hydraulic displacement, see chapter 3.3.1
- DA function / pressure cut-off valve, see chapter 3.3.2
- DA1 function / pressure cut-off valve with override, see chapter 3.3.3
- TCH function / hydraulically controlled torque regulation with pressure cut-off valve, see chapter 3.3.4
- EL function / electro-proportional displacement, see chapter 3.3.5
- ELS function / electro-proportional displacement with safety valve, see chapter 3.3.6
- TCE function / electrically controlled torque regulation with pressure cut-off valve, see chapter 3.3.7
3.3.1 SD function
The SD regulation is suitable for applications that require a proportionally regulated volumetric flow rate.
Characteristic curve
When the drive is displaced from V
g min
toward V
g max
, the pump swivels to a greater displacement volume V
g
with
increasing SD control pressure at X1 / X2.
If X1 / X2 is switched, then the control piston is displaced into the regulator adjusting unit. The deflection leads di-
rectly to the swivel yoke / swivel cradle by mechanical transfer through an adjusting lever, to swivel out the swivel
yoke / the swivel cradle, countering the spring force of the return spring toward V
g max
.
If there is a failing, missing, or defective actuation signal to X1 / X2, the pump swivels toward V
g min
.
Characteristic
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
29
3.3.2 DA function
The DA pressure regulation provides the minimization or limitation of the volumetric flow rate of the axial piston unit
when it reaches a fixed setting for the high-pressure value pHD. By swiveling toward
V
g min
, the hydraulic system is protected from damage and overload.
It is swiveled toward V
g min
until the volumetric flow rate of the axial piston unit, at precisely this pressure level,
meets the needs of the consumer.
The function of the pressure regulator ensures that the pressure in the system remains constant, even with a chang-
ing volumetric flow rate. This equalizes all internal and external losses of leakage oil.
Setting range XE approx. 30- 400 bar.
Options
- Additional internal structural design measures for vibration damping should be implemented after consultation.
- Pressure cut-off valve with override function: see chapter 3.3.3
3.3.3 DA1 function
In the closed-loop circuit, the override function DA1 corresponds to a two-stage pressure cut-off valve with 2 pres-
sure stages.
- Pressure stage 1, e.g.: 250 bar or
- Pressure stage 2, e.g.: 400 bar
The DA1 function in the DA axis in the pressure regulator has the purpose of overriding the fixed setting of the DA
cut-off pressure of pressure stage 1 (e.g., 250 bar) by means of an externally fed control pressure pY-pT at the con-
nection Y, and consequently increasing the high pressure to the fixed setting of the DA cut-off pressure of pressure
stage 2 (e.g., to 400 bar).
This makes it suitable for systems or devices that either require a controllable ability to increase torque or are sub-
ject to multiple use. Examples are the working hydraulics in mobile excavators and their travel hydraulics.
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
30
3.3.4 TCH function
With the TCH function, the displacement volume V
g
of the hydraulic pump can be set in several stages that are de-
pendent on the control pressure at X1 / X2 (pst-pT) and proportionate to the high pressure pHD. This realizes con-
stant rotating speeds of the slewing ring, with the simultaneous ability to limit the maximum power input.
With increasing control pressure at X1 / X2, the hydraulic pump swivels toward V
g max
, and with an increasing pres-
sure differential ΔP
A-B
it swivels toward V
g min.
(See diagram)
The respective high pressure is fed back to the pilot control valve and counteracts the control signal.
When the drive is at a standstill, it is possible to build up the pressure differential ΔP
A-B
in the system proportionate
to the control signal at X1 / X2, e.g., for holding the superstructure when working on a slope. (See block curve)
The TCH function is combined with the DA function, see chapter 3.3.2 and it is particularly well suited for slewing-
gear controls, for instance.
3.3.5 EL function
With the EL function, the displacement volume V
g
of the axial piston unit is displaced proportionally and infinitely
variably via a solenoid.
The EL function is subordinate to the DA function, meaning that the EL function dependent on the control current
is only implemented below the set value for the pressure cut-off.
Block curve
Characteristic
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
31
When the drive is displaced from V
g min
toward V
g max
, the pump swivels to a greater displacement volume V
g
with
increasing control current= I at the proportional solenoid DRE.
If E1 / E2 is switched, then the control piston is displaced into the regulator adjusting unit. The deflection leads di-
rectly to the swivel yoke / swivel cradle by mechanical transfer through an adjusting lever, to swivel out the swivel
yoke / the swivel cradle, countering the spring force of the return spring toward V
g max
.
The hydraulic fluid required for this is obtained from the high-pressure pHD. For low high pressure pHD < 30 bar,
the connection Fa must be supplied with a feed pressure of approx. 30 bar in order to ensure the displacement.
If there is a missing or defective actuation signal, the axial piston unit swivels to V
g min
.
Options
- Safety function. see chapter 3.3.6
3.3.6 ELS function
If the current consumption at the proportional solenoid DRE exceeds a defined value (e.g., 210 mA), then a switch
solenoid E3 / E4 is automatically also supplied with voltage and closes a channel against tank pressure pT in the
respective stop valve. This operation is repeated with each actuation of the proportional solenoid DRE.
In the event of damage to the proportional solenoid (e.g., becoming stuck due to chucking abrasion), the machine
operator, by switching off the control current I at E1 / E2, de-energizes the switch solenoid E3 / E4 and opens the
channel to the tank pressure pT in the respective stop valve, and the control pressure is decreased. The axial piston
unit swivels toward V
g min
.
Set point
Proportional solenoid
E1/E2
Switch solenoid E3/E4
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
32
Pressure-relief valve (DRE) variant 1
General information
- Nominal voltage: 24 V
- Current
Max.
: 750 mA
- Supply pressure
Max.
: 50 bar
- Solenoid characteristic: flat around the regulating position
Abbreviation Designation
T Tank
PP Input DRE
PS Output DRE
Plug connection
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
33
Pressure-relief valve (DRE) variant 2
General information
- Nominal voltage: 24 V
- Current
Max.
: 750 mA
- Supply pressure
Max.
: 350 bar
- Solenoid characteristic: increasing around the regulating position
Abbreviation Designation
T Tank
PP Input DRE
PS Output DRE
Plug connection
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
34
Switching solenoid (safety function)
General information
- Nominal voltage: 24 V
- Resistance = 25 ohm
- Limiting current I
Max.
: 585 mA
Plug connection
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
35
3.3.7 TCE function
With the TCE function, the displacement volume V
g
of the hydraulic pump can be set in several stages that are de-
pendent on the control current = I [mA] and proportionate to the high pressure pHD. This realizes constant rotating
speeds of the slewing ring, with the simultaneous ability to limit the maximum power input.
With increasing control current = I [mA] at the DRE proportional solenoid E1 / E2, the hydraulic pump swivels toward
V
g max
, and with an increasing pressure differential ΔP
A-B
it swivels toward V
g min.
(See diagram)
The respective high pressure is fed back to the pilot control valve and counteracts the control signal.
When the drive is at a standstill, it is possible to build up the pressure differential ΔP
A-B
in the system proportionate
to the control current = I [mA] at the DRE proportional solenoid E1 / E2, e.g., for holding the superstructure when
working on a slope. (See block curve)
The TCE function is combined with the DA function, see chapter 3.3.2 and it is particularly well suited for slewing-
gear controls, for instance.
Block curve
Current characteristics
3 Actuation and regulation types
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
36
Angle-of-rotation sensor
General information
- Supply voltage: 5 VDC
- Measurement range
.
: -27° to + 27°
- Output signal: 0.5VDC to 4.5 VDC
- Operating temperature: -40°C to +125°C
Plug connection
Note
The angle sensor cannot be retrofitted and must be taken into account during the new configuration of
the DPVG.
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
37
Depending on the mounting position and installation variant, the gravitational curb weight and housing pressure
have to be taken into account along with the effects of displacement and regulation, such that the settings of the
device or system may have to be adjusted.
The suction and leakage-fluid lines, in all mounting positions, must flow into the tank below the minimum fluid level
in order to prevent foam formation.
The oil tank must be designed in such a manner that the hydraulic fluid cools sufficiently during circulation and
any impurities are deposited on the floor of the tank.
Note
Liebherr differentiates between two installation variants, A and B, as well as six mounting positions, 1-6,
for the axial piston units.
Note
Recommended installation variant(s):
Below-tank installation A
Installation variant(s) to be avoided:
None
Note
Recommended mounting position(s):
Drive shaft horizontal
Mounting position(s) to be avoided:
None
4 Installation conditions
4 Installation conditions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
38
4.1 Installation variants
Below-tank installation “A”: Axial piston unit is installed below the minimum fluid level of the tank.
Above-tank installation “B”: Axial piston unit is installed above the minimum fluid level of the tank.
Note
The installation variant is only meaningful for application with an integrated feed pump, and it is described
in this section.
If there is no integrated feed pump in the mounting plate, then the installation variant is irrelevant.
Abbreviation Designation Remark
4 Baffle plate for pacifying the hydraulic fluid in the tank
B Distance
between suction connection and leakage-oil connection
in the tank (the larger the better)
H
Maximum suction height (only relevant for above-tank
installation and with feed pump)
750 mm
L Leakage-oil connections -
M
Minimum distance from the end of the line
to the floor of the tank
115 mm
S Suction-line connection -
T Tank -
4 Installation conditions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
39
4.2 mounting positions
In each of the two installation variants there are six possible mounting positions. As a rule for the DPVG mounting
position, it has to be ensured that the crankshaft of the drive motor / the drive of the pump distributor gear is in line
with the drive shaft of the DPVG.
ATTENTION
An air buffer in the bearing area, particularly for mounting positions 1 and 3, can result in damage to the
hydraulic unit. Ensure that the pump housing has been completely filled with pressure fluid and bled, both
at initialization and during operations. Regularly inspect the pressure-fluid level in the housing space; re-
initialize if necessary.
Note
To prevent emptying of the axial piston unit in mounting position 3 and installation variant B, a check valve
with an opening pressure of max. 0.5 bar can be installed in the leakage-fluid line after consultation with
Liebherr.
5
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
40
5.1 NG 085 (independent of the rotation direction)
EL - DA
A/B Working line SAE J518-1ª, 6000 psi
R1 Bleeding M12x1.5
T1 - T2 Leakage oil M26x1.5
Fa Feed-pressure connection M22x1.5
Port
connections
E1 / E2
Pressure-relief valve, plug: AMP Junior Timer 2 pin
PWM = 100Hz, E = 24 V, Imax = 750mA
M1 / M2 High-pressure measuring connection M12x1.5
M4 / M5 Actuating-pressure measuring connection M12x1.5 M6 / M7 Control-pressure measuring connection M12x1.5
Point of the center of gravity
VIEW Y
VIEW X
VIEW Z
Pressure cutoff
Pressure and feed
valves
Charge-pressure
valve
D
e
p
t
h
1
7
5 Dimensions
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
41
5.1.1 Possible combinations with additional types of regulation
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL-DA1
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA override ISO 9974-1 M12x1.5
Pressure cutoff DA1
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Pressure cutoff DA
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
42
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA1
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Y DA1 override ISO 9974-1
M12x1.5
Pressure cutoff DA1
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Pressure cutoff DA
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA1
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA-Übersteuerung ISO 9974-1
M12x1.5
Pressure cutoff DA1
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
43
E1/
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
TCE
E3/
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6/
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
TCH
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
44
5.1.2 NG 085 Mounting flange
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
SAE C, (SAE J744)
Type code 23
ISO 3019-2
Type code 31
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
45
5.2 NG 108 (independent of the rotation direction)
EL - DA
A/B Working line SAE J518-1'', 6000 psi
R1 Bleeding M14x1.5
T1 - T2 Leakage oil M33x2
Fa Feed-pressure connection M26x1.5
M1 / M2 High-pressure measuring connection M12x1.5
M4 / M5 Actuating-pressure measuring connection M14x1.5
Port
connections
E1 / E2
Pressure-relief valve, plug: AMP Junior Timer 2 pin
PWM = 100Hz, E = 24 V, Imax = 750mA
T3 Return feed-pressure valve M26x1.5 M6/M7 Control-pressure measuring connection M14x1.5
Point of the center of gravity
VIEW Y
VIEW X
VIEW Z
Pressure cutoff
Pressure and feed valves
Charge-pressure
valve
D
e
p
t
h
1
7
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
46
5.2.1 Possible combinations with additional types of regulation
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
E1/
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL-DA1
M6/
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA override ISO 9974-1 M12x1.5
Pressure cutoff DA1
E1/
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS
E3/
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6/
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
E1/
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA
E3/
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25ΩΩ
M6/
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Pressure cutoff DA
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
47
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA1
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Y DA1 override ISO 9974-1 M12x1.5
Pressure cutoff DA1
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Pressure cutoff DA
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA1
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA1 override ISO 9974-1
M12x1.5
Pressure cutoff DA1
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
48
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
TCE
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
TCH
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
49
5.2.2 NG 108 Mounting flange
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
SAE D, (SAE J744)
Type code 24
ISO 3019-2
Type code 31
Diesel-engine flange SAE 2 (SAE J617)
Type code 12
10.5*) Displacement of the mounting flange
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
50
5.3 NG 165 (independent of the rotation direction)
EL - DA
A/B Working line SAE J158-1 1/4'', 6000 psi
R1 Bleeding M14x1.5
T1 - T2 Leakage oil M42x2
Fa Feed-pressure connection M33x2
M1 / M2 High-pressure measuring connection M12x1.5
M4 / M5 Actuating-pressure measuring connection M14x1.5
Port
connections
E1 / E2
Pressure-relief valve, plug: AMP Junior Timer 2 pin
PWM = 100Hz, E = 24 V, Imax = 750mA
T3 Return feed-pressure valve M22x1.5 M6/M7 Control-pressure measuring connection M14x1.5
Point of the center of gravity
VIEW Y
VIEW X
VIEW Z
Pressure cutoff
Pressure and feed
valves
Charge-pressure
valve
D
e
p
th
1
8
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
51
5.3.1 Possible combinations with additional types of regulation
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
E1/
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL-DA1
M6/
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA override ISO 9974-1 M12x1.5
Pressure cutoff DA1
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Pressure cutoff DA
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
52
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA1
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Y DA1 override ISO 9974-1 M12x1.5
Pressure cutoff DA1
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Pressure cutoff DA
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA1
M6/
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA override ISO 9974-1
M12x1.5
Pressure cutoff DA1
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
53
Note
X3 is only to be connected for LR1
X4 is only to be connected for LS1
X5 is only to be connected for DA1
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
TCE
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
TCH
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
54
5.3.2 NG 165 Mounting flange
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
ISO 3019-2
Type code 31
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
55
5.4 NG 280 (independent of the rotation direction)
EL - DA
A/B Working line SAE J518-1 1/2'', 6000 psi
R1 Bleeding M22x1.5
T1 - T2 Leakage oil M42x2
Fa Feed-pressure connection M26x1.5
M1 / M2 High-pressure measuring connection M12x1.5
M4 / M5 Actuating-pressure measuring connection M14x1.5
Port
connections
E1 / E2
Pressure-relief valve, plug: AMP Junior Timer 2 pin
PWM = 100Hz, E = 24 V, Imax = 750mA
T3 Return feed-pressure valve M26x1.5 M6/M7 Control-pressure measuring connection M14x1.5
Point of the center of gravity
VIEW Y
VIEW X
VIEW Z
Pressure cutoff
Pressure and feed
valves
Charge-pressure
valve
D
e
p
t
h
2
4
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
56
5.4.1 Possible combinations with additional types of regulation
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
E1/
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
EL-DA1
M6/
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA override ISO 9974-1 M12x1.5
Pressure cutoff DA1
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Pressure cutoff DA
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
57
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
ELS-DA1
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
Y DA1 override ISO 9974-1 M12x1.5
Pressure cutoff DA1
Pressure cutoff DA
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Pressure cutoff DA
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
SD-DA1
M6/
M7
Control-pressure measuring connection ISO 9974-1
M14x1.5
Y DA override ISO 9974-1
M12x1.5
Pressure cutoff DA1
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
58
E1 /
E2
Plug: AMP Junior - Timer 2 pin
En = 24 V Imax = 750mA PWM 100Hz
TCE
E3 /
E4
Stop valve Deutsch connector DT04-2P
IG=0.585 A-100% ED E=24V R=25Ω
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
X1 /
X2
Control-pressure connection ISO 9974-1
M12x1.5
TCH
M6 /
M7
Control-pressure measuring connection ISO 9974-1
M12x1.5
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
59
5.4.2 NG 280 Mounting flange
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
SAE E, (SAE J744)
Type code 25
ISO 3019-2
Type code 31
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
60
5.5 Shaft end dimensions, NG 085 to 280
5.5.1 NG 085 Shaft end
W35x2x16x9g Splined shaft DIN 5480
Splined shaft ANSI B92.1a 1 1/4 in 14 T 12/240P
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
Type code 1
Type code 2
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
61
5.5.2 NG 108 Shaft end
W45x2x21x9g Splined shaft DIN 5480
5.5.3 NG 165 Shaft end
W45x2x21x9g Splined shaft DIN 5480
5.5.4 NG 280 Shaft end
W55x2x26x9g Splined shaft DIN 5480
Type code 1
Type code 1
Type code 1
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
62
5.6 Through-drive dimensions
5.6.1 SAE B
5.6.2 SAE BB
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV G / 000 1 A O
NS-DB-DS
Gearing: ANSI B92.1a-1976 7/8“ 13T 16/32 DP
NG W1 W2 W3 W4 L G1 (2 Hole) G2 (4 Hole)
085
12 10.5 48.5 60.5 293.5 M12x1.75: 22Deep -
108
12 10.5 48.5 60.5 294 M12x1.75: 26Deep -
165
12 14.1 35.1 45.1 348 M12x1.75: 26Deep -
280
12 10.5 48.5 60.5 360 M12x1.75: 18Deep -
Enter code in the type code: B11D : 2 Hole / B12D : 4 Hole
O-ring (included
in the scope
of delivery)
L to mounting flange
O-ring (included
in the scope
of delivery)
L to mounting flange
Gearing: ANSI B92.1a-1976 1“ 15T 16/32 DP
NG W1 W2 W3 W4 L G1 (2 Hole) G2 (4 Hole)
085
12 10.5 48.5 60.5 293.5 M12x1.75: 22Deep -
108
12 10.5 48.5 60.5 294 M12x1.75: 26Deep -
165
12 10.5 49 60.5 348 M12x1.75: 26Deep -
280
12 10.5 48.5 60.5 360 M12x1.75: 18Deep -
Enter code in the type code: B21D : 2 Hole / B22D : 4 Hole
O-ring (included
in the scope
of delivery)
L to mounting flange
O-ring (included
in the scope
of delivery)
L to mounting flange
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
63
5.6.3 SAE C
5.6.4 SAE CC
Gearing: ANSI B92.1a-1976 1 1/4“ 14T 12/24 DP
NG W1 W2 W3 W4 L G1 (2 Hole) G2 (4 Hole)
085
14 17 47 59 297.5 M16x2 : 26Deep -
108
14 23 53 65 304 M16x2 : 23Deep M12x1.75 : 18Deep
165
14 13 54 59.5 358 M16x2 : 23Deep M12x1.75 : 18Deep
280
14 10.5 56 68 396 M16x2 : 23Deep M12x1.75 : 18Deep
Enter code in the type code: C11D : 2 Hole / C12D : 4 Hole
O-ring (included
in the scope
of delivery)
L to mounting
flange
Only with NG 280
Gearing: ANSI B92.1a-1976 1 1/2“ 17T 12/24 DP
NG W1 W2 W3 W4 L G1 (2 Hole) G2 (4 Hole)
085
- - - - - - -
108
14 13 53 65 304 M16x2 : 23Deep M12x1.75 : 18Deep
165
14 13 54 65 358 M16x2 : 23Deep M12x1.75 : 18Deep
280
14 14 54 66 396 M16x2 : 23Deep M12x1.75 : 18Deep
Enter code in the type code: C21D : 2 Hole / C22D : 4 Hole
O-ring (included
in the scope
of delivery)
L to mounting
flange
Only with
NG 280
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
64
5.6.5 SAE D
5.6.6 SAE E
Gearing: ANSI B92.1a-1976 1 3/4“ 13T 8/16 DP
NG W1 W2 W3 W4 L G1 (2 Hole) G2 (4 Hole)
085
- - - - - - -
108
14 16.5 64 78 314 - M20x2.5 : 36Deep
165
14 21.5 68 80 358 - M20x2.5 : 36Deep
280
14 20.5 68 80 396 - M20x2.5 : 36Deep
Enter code in the type code: D11D : 2 Hole / D12D : 4 Hole
O-ring (included
in the scope
of delivery)
L to mounting
flange
Gearing: ANSI B92.1a-1976 1 3/4“ 13T 8/16 DP
NG W1 W2 W3 W4 L G1 (2 Hole) G2 (4 Hole)
085
- - - - - - -
108
- - - - - - -
165
- - - - - - -
280
12 10.5 48.5 60.5 360 - M20x2.5 : 36Deep
Enter code in the type code: E11D : 2 Hole / E12D : 4 Hole
O-ring (included
in the scope
of delivery)
L to mounting
flange
5 Dimensions
Axial piston variable-displacement pump
DPVG 085 to 280
Date: 12/2014
Version: 1.0
ID No.: 11357580
65
5.7 Multi-circuit pump in tandem design
General
The basic axial piston pump P1 can be combined with an additional axial piston pump P2 using an intermediate
flange 10 and a coupling ferrule 11. The multi-circuit pump created in this manner has its own identification number.
The type code must be filled in for both individual pumps using a hyphen between the two type codes.
5.7.1 Dimensions of the multi-circuit pump in tandem design
x Available
o Upon request
- Not technically possible
L) Length in mm
*) Through-drive code for the pump 1 type code
Abbreviation Designation Abbreviation Designation
P1 Basic pump 10 Intermediate flange
P2 Mounting pump 11 Coupling ferrule
L Total length of the multi-circuit pump in mm
Note
Upon request, multi-circuit pumps consisting of three individual pumps can be realized.
NG P1 NG P2
085 108 165 280
085
o (L = 569 with C11D*) - - -
108
o (L = 568.5 with C11D* / C12D*) o (L = 572 with D32D*) - -
165
o (L = 651.5 with C11D* / C12D*) o (L = 616 with D32D*) o (L = 670 with V32D*) -
280
o (L = 667.5 with C11D* / C12D*) x (L = 664 with D32D*) x (L = 718 with V32D*) x (L = 756 with E32D*)
Sales
Liebherr-Components AG
Postfach 222, CH-5415 Nussbaumen /AG
+41 56 296 43 00, Fax +41 56 296 43 01
www.liebherr.com, E-mail: info.cos@liebherr.com
Development / Production
Liebherr Machines Bulle SA
45 rue de l'Industrie, CH-1630 Bulle / FR
+41 26 913 3479, Fax: +41 26 913 3485
www.liebherr.com, E-mail: info.lmb@liebherr.com
Changes, conditions, copyright
Over the course of technical development, we reserve the right to make changes without prior announcement.
©: Information and images in this data sheet may neither be duplicated and distributed nor used for commercial
purposes. All rights are expressly reserved for Liebherr according to copyright law, including in the event of appli-
cations for industrial property rights.
The information in this data sheet does not release the user from the obligation to perform his own assessments and
tests.
If not otherwise indicated, this data sheet illustrates primarily an example configuration (DPVG 280 EL-DA). There-
fore, the product delivered to you may deviate from the illustration.
Deviations are also possible for data and values in this data sheet. These only serve as the default selection for the
product configuration, and they are not binding. Unless stated otherwise, the values provided refer to the example
configuration (DPVG 280 EL-DA). Always use the values from the installation drawing that was delivered to you.
Warranty and liability conditions of the General Conditions of Business of Liebherr Machines Bulle SA and Liebherr-
Components AG are not extended by the above notice.
