The robust axial piston pumps of the series DPVO have
been especially developed for use in mobile work
machines in harsh environmental conditions.
The swashplate design with large swing angle is ideal for
applications which require an variable displacement
volume.
The DPVO base pumps can be combined with various
regulators, mounting flanges and shaft ends thanks
N
to a sophisticated modular system. p
max
A charge pump, a trough drive and a different direction
of rotation are also possible, just like the configuration of
two DPVO pumps in tandem design.
Valid for:
DPVO 108
DPVO 140
DPVO 165
DPVO 215
Features:
Open circuit
Series D
Nominal pressure p
N
= 400 bar
Highest pressure p
max
= 450 bar
Various regulator types can be selected
Document identification:
Identification number: 10150821
Edition: 04.2014
Valid for: DPVO 108 to 215
Author: Liebherr department ED5 / HR1
Version: 1.2
Axial piston pump with variable displace-
ment volume: DPVO
Data sheet
Table of contents
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
2
1 Type code 3
2 Technical data 6
2.1 Values tables 6
2.2 Direction of rotation 7
2.3 Permitted pressure range 8
2.4 Shaft lip seal 10
2.5 Housing flushing 10
2.6 Attachments 11
2.7 Gear pump 12
2.8 Hydraulic fluids 13
3 Control and regulator types 17
3.1 Regulator types 17
3.2 Hydraulic diagrams 18
3.3 Regulator functions 35
3.4 Electrical components 46
4 Installation conditions 49
4.1 Installation variants 50
4.2 Installation location 52
5 Dimensions 53
5.1 NG 108 (direction of rotation = right) 53
5.2 NG 140 (direction of rotation = right) 58
5.3 NG 165 (direction of rotation = right) 63
5.4 NG 165 (direction of rotation = left) 67
5.5 NG 215 (direction of rotation = right) 72
5.6 NG 215i (direction of rotation = left) 77
5.7 Through drive dimensions ANSI B92.1a 82
5.8 Through drive dimensions DIN 5480 84
5.9 Multi-circuit pump in tandem design 85
1 Type code
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
3
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
1. Pump type
Series D / pump / variable DPV
2. Circuit type
Open O
3. Nominal size (NG) = displacement volume V
g max
in cm
3
NG 108 140 165
215
without
impeller
with
impeller
1
4. Displacement volume V
g
min
cm
3
0 - 15 % of V
g max
value to transcribe in cm
3
5. Activation / regulator type
Fan drive x o o o o
LU
Electro proportional / pressure cut-off o o x o x
EL1 - DA
Electro proportional / pressure cut-off** o o x o o
EL1 - DA1
Electro proportional / load sensing o o x o x
EL1 - LS
Power regulator o o o o o
LR
Power regulator** o o o o o
LR1
Power regulator / load sensing x o x x o
LR - LS
Power regulator** / load sensing o x x x o
LR1 - LS
Power regulator / load sensing*** o o o o o
LR - LS1
Power regulator** / load sensing*** o o x o o
LR1 - LS1
Power regulator / control pressure proportional / pressure cut-off o o o o o
LR - SD2 - DA
Power regulator** / control pressure proportional / pressure cut-off o o o o x
LR1 - SD2 - DA
Power regulator / control pressure proportional / pressure cut-off** o o o o o
LR - SD2 - DA1
Power regulator** / control pressure proportional / pressure cut-off**
o o o o o
LR1 - SD2- DA1
Load sensing / pressure cut-off o o x o o
LS - DA
Summation power regulator / control pressure proportional - - - o o
SL - SD1
Summation power regulator** / control pressure proportional - - - o o
SL1 - SD1
6. Design
1
7. Direction of rotation with view of drive shaft
Right x x x x o R
Left o o x o x L
8. Mounting flange
Diesel engine flange SAE J617
SAE 1 o o o o o 11
SAE 2 x x x x x 12
SAE 3 o o o o o 13
SAE 4 x x x o o 14
Mounting flange SAE J744
SAE D x x x - - 24
SAE E - - - x x 25
9. Shaft end
Splined shaft according to
DIN 5480 x x x x x 1
ANSI B92.1a o x x x o 2
1 Type code
1 Type code
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
4
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
10. Connections (SAE J518)
High pressure connection 6000 PSI; suction port 500 PSI A
11. Attachments
Without x x x x - 0
With charge pump (impeller) o o o - x I*
12. Gear pump
Without gear pump x x x x x 00
With gear pump (V
g
= 24 cm
3
)
x o x o o 24
13. Through drives
Standard
Centering diameter
Coupling for splined
shaft according to
Position of the fastening
threads
according to SAE
108 140 165
215
without
impeller
with
impeller
1
- - - o o o o x 0000
Ø101,6
SAE B
ANSI B92.1a
7/8 in 13T 16/32DP
Type K basic (2 hole) x x x x x B11D
Type S basic (4 hole) o o o o o B12D
SAE BB
ANSI B92.1a
1 in 15T 16/32DP
Type K basic (2 hole) o o o o x B21D
Type S basic (4 hole) o o o o o B22D
Ø127
SAE C
ANSI B92.1a
1 1/4 in 14T 12/24DP
Type K basic (2 hole) o o o o x C11D
Type S basic (4 hole) o o o o x C12D
SAE CC
ANSI B92.1a
1 1/2 in 17T 12/24DP
Type K basic (2 hole) - o o o o C21D
Type S basic (4 hole) - o o o o C22D
Ø152,4 SAE D
ANSI B92.1a
1 3/4 in 13T 8/16DP
Type K basic (2 hole) - - o o o D11D
Type S basic (4 hole) - - o o o D12D
2 u.4 hole mix - - o o o D13D
DIN 5480
W40x2x18x9g
Type K basic (2 hole) o o o o o D31D
Type S basic (4 hole) o o o o o D32D
2 u.4 hole mix o o o o o D33D*
DIN 5480
W45x2x21x9g
Type K basic (2 hole) - o o o o D41D
Type S basic (4 hole) - o o o o D42D
2 u.4 hole mix - o o o o D43D*
Ø165,1 SAE E
ANSI B92.1a
1 3/4 in 13T 8/16DP
Type K basic (2 hole) - - - o o E11D
Type S basic (4 hole) - - - o o E12D
DIN 5480
W50x2x24x9g
Type K basic (2 hole) - - - o o E31D
Type S basic (4 hole) - - - o o E32D*
Note
*) D33D, D43D and E32D have to be written in the hydraulic pump 1 type code (by use with multi-circuit
pumps in tandem design) with input shaft DIN 5480 from hydraulic pump 2.
1 Type code
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
5
*) currently only available in NG 215 direction of rotation left
**) with oversteer
***) p lowering
1
)215i
x available
oupon request
- not possible
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
14. Valve
Without valve 0
15. Sensors
Without sensor x x x x x 0
Rotation angle sensor = W o o o x o W
Note
Contact addresses for inquiries are located on the back page of this document.
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
6
2.1 Values table
*) These values apply at an absolute pressure of 1 bar at the suction channel.
Higher suction limit values are possible by increasing the suction pressure on the suction channel p
abs
.
**) M
E per
with shaft end ANSI B92.1a is to be considered
***) Nominal sizes 108 and 140 are a highspeed-model, max. speed at V
g max*
= 2300min
-1
available.
To be specified when ordering.
Note
The stated values (maximum data) are theoretical values, rounded, without efficiency factors and
tolerances.
Nominal size 108 140 165
215
without
imp.
with imp.
Displacement volume
V
g max
cm
3
107.7 140.2 167.8 216.6 216.6
V
g min
cm
3
0 - 15% of V
g max
> 15% of V
g max
upon request.
Standard model***
Max. speed at V
g max*
n
max
min
-1
2100 2100 2100 2000 2600
Volume flow at n
max
and V
g max*
qv
max
l/min 226 294 352 433 563
Drive power at qv
max
and p = 400 bar p
max
kW 151 196 235 289 375
Torque at V
g max
and p = 400 bar M
max
Nm 685 893 1068 1379 1379
Torsional stiffness
Shaft DIN 5480 Nm/rad 157000 228800 199200 320900 320300
ANSI B92.1a-1976 1 3/4
IN 13T 8/16 DP
Nm/rad - 195600 230400 226200 225100
Driving gear moment of inertia
J
TW
kgm
2
0.015 0.024 0.031 0.048 0.047
Mass (approx.) m kg 56 65 74 125 125
Permitted transverse and axial load of the driving shaft
Max. transverse force
F
q max
N
The permitted forces are the result of the load
spectrum. Please consult when a belt drive is planned.
Max. axial force
F
a± max
N 1000 2000 3000 3000 3000
Permitted input and drive torques
Max. input torque with shaft end DIN 5480
M
E per
Nm 1265 1830 1950 2940 2940
Max. input torque with shaft end ANSI B92.1a
M
E per
Nm - 1700 1700 1700 1700
Max. drive torque
M
D per
Nm 1265 1830** 1950** 1810** 2200**
2 Technical data
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
7
T1*) M
max
, with simultaneous p
max
and V
g max
2.2 Direction of rotation
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
The direction of rotation is stated with view of the driving shaft,
as shown in the figure.
R right = clockwise
L left = counterclockwise
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
8
2.3 Permitted pressure range
2.3.1 Operating pressure
Suction side "S"
Absolute pressure at connection "S":
pabs
min
= 0.8 bar / pabs
max
= 2 bar (higher values upon request)
Work side "A1 / A2"
Pressure at the working connection "A1" or "A2":
Nominal pressure p
N
= 400 bar (fatigue endurable) /
Maximum pressure p
max
= 450 bar (short-term)
Note
Stated values pabs
min
, pabs
max
, p
N
and p
max
and p
min
apply for hydraulic pumps without and with charge
pump.
Note
Definition of short-term, if nothing else is stated: t < 1s, t
ges.
= 300 OH.
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
9
2.3.2 Minimum operating pressure
In order to be able to guarantee sufficient lubrication in the driving gear during operation at all swing angles,
a pressure of at least pHD
min
= 6 bar at V
g max
and a pressure of at least pHD
min
= 18 bar at V
g min
must exist in the
workshop, measured e.g. at M2.
The values are dependent on external conditions, such as e.g. the type of hydraulic oil used or the temperature, and
must be individually calculated for each application. Values upon request.
2.3.3 Housing, leakage oil pressure
The housing or leakage oil pressure pL may not exceed maximum values, for limit values, see chapter 2.4.3.
The number of leakage oil connections T can vary depending on application.
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
10
2.4 Shaft lip seal
2.4.1 General information
The rotary shaft lip seals (RWDR) from Liebherr are special sealing elements which permit a specific housing
pressure. In order to ensure that the tribological system functions optimally, the operating conditions
must be adhered to.
Depending on the peripheral speed, oil temperature, lubricant and pressure build-up in the housing, the sealing
edge temperature can be around 20° to 40°C over the leakage oil temperature of a hydraulic axial piston unit.
2.4.2 Temperature range
The FKM rotary shaft lip seal is permitted for housing temperatures from -25°C to +115°C.
For applications under -25°C, please consult.
2.4.3 Permitted pressure load for hydraulic pumps
The life of the RWDR is influenced by the speed "n" of the axial piston unit and the leakage oil pressure "pL".
The leakage oil pressure "pL" on a sustained basis should not exceed 3 bar abs. at operating temperature.
The max. permitted leakage oil pressure is 6 bar absolute at reduced speed (see diagram).
Short-term pressure peaks of max. 10 bar abs. are permitted short-term (t <0.1 s). The more pressure peaks arise,
the shorter the life of the shaft lip seal. The pressure in the axial piston unit must always be higher than the external
pressure on the shaft lip seal.
2.5 Housing flushing
Under various operating conditions, e.g. a very low variable displacement volume over a longer period of time, a
marginal temperature increase in the housing can result. Limit values, see chapter 2.8.
If this is the case, a housing flushing is necessary, which leads the "hot" hydraulic oil to an external cooler, cools it
there and feeds it back into the hydraulic system.
The flushing volume qV in L/min is to be individually set for each nominal size in connection with the application and
is the responsibility of the device or system manufacturer.
Shaft diameter (mm) Nominal size
45 108
50 140 & 165
60 215
Per. pressure p
abs.
max. in bar
Speed n in rpm
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
11
2.6 Attachments
2.6.1 Charge pump (impeller)
Charge pumps for variable single pumps are currently only offered for nominal size 215. They are designed as radial
and centrifugal pumps with axial bogie wheel (propeller). Charge pumps for other nominal sizes upon request.
Charge pump mode of action
The hydraulic oil supplied via the suction pipe connection port on the terminal board is set in rotation
by the attached propeller wheel during rotation of the driving shaft, is accelerated by the centrifugal force and
pushed outward.
The hydraulic oil escapes radially, so vertical to the driving shaft, significantly faster and with a higher pump
pressure from the propeller and is forwarded into a channel for the suction kidney of the control plate.
As a result, a greater variable displacement volume and a higher pump pressure is present at the suction kidney of
the control plate at the same time; the axial piston unit has therefore been "charged" to enhance performance.
The charge pump increases the intake pressure of the driving gear, which facilitates the suctioning at a higher
viscosity of hydraulic fluid and promotes a low-wear coldstart.
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
0 without loading pump (Impeller)
I with loading pump (Impeller)
Note
In order to increase the intake pressure of the driving gear, the tank charging procedure was also used
in the past, in which an overpressure was created in the tank by means of the exhaust from
the combustion engine. This procedure can be replaced by the use of the charge pump.
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
12
2.6.2 Hydraulic diagram with charge pump
1 - charge pump
2.7 Gear pump
1-gear pump
X-ANSI B92.1a-1976 7/8 spline shaft size 30° pressure angle 13 teeth 16/32 Pitch-Tlg Kl.7
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
00 without gear pump
24 with gear pump
Note
A gear pump can only be implemented in combination with drive shaft = B11D or 0000.
For multi-circuit pumps in tandem design, a common gear pump on hydraulic pump 2 is recommended,
see chapter 5.9.
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
13
2.8 Hydraulic fluids
2.8.1 General information
The selection of the appropriate hydraulic fluid is significantly influenced by the operating temperature
to be expected, subject to the ambient temperature, which is equivalent to the tank temperature.
Use the oil comparative values for selecting the appropriate hydraulic fluid. see chapter 2.8.5
2.8.2 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: from approx. 500 mm
2
/s *
- Optimum operating range: 16-36 mm
2
/s *
- The viscosity may not fall below 8 mm
2
/s (short-term, i.e. < 3 min, 7mm
2
/s) at max. leakage oil temperature.
- The shear stability (KRL) is to be observed for multigrade oils.
*) Open circuit: with regard to tank temperature
Closed circuit: with regard to circuit temperature
In addition to the viscosity characteristics, the Liebherr GSP specification ID no. 10465804 must be observed.
2.8.3 Fill quantity
The required fill quantity varies individually, values upon request.
2.8.4 Filtering
- In order to be able to maintain the prescribed purity class "21/17/14 according to ISO 4406" in all circumstances,
filtering the hydraulic fluid is necessary.
- Filtering the hydraulic fluid is achieved by the device-specific use of oil filters in the hydraulic system.
- Cleaning and maintenance intervals for the oil filter, or rather of the complete oil circuit, are dependent on the use
of the device and can be found in the device-specific operating instructions.
ATTENTION
Mixing different mineral oil hydraulic fluids is prohibited!
Note
Before commissioning, the hydraulic unit must be filled with oil and ventilated.
This must be checked during operation and after longer standstills and repeated if necessary!
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
14
2.8.5 Oil comparative values
*) Prewarming is absolutely necessary for temperatures under -25°C.
**) Applicable for Liebherr mining excavators: -40°C to +45°C (for temperatures under -25°C,
the use of the appropriate Liebherr Arctic kit is necessary).
***) Prewarming is absolutely necessary for temperatures under -40°C.
1
) Applicable for Liebherr mining excavators: -50°C to +30°C (for temperatures under -30°C, the use
of the appropriate Liebherr Arctic kit is necessary).
2
) For use in automatic transmissions.
3
) For use in cranes.
4
) For use in Liebherr cranes.
Oil grade
Application outside
temperature
°
C
Density at 15 °C
kg/m
3
Viscosity
class ISO
VG
Kinematic
viscosity at 40 /
100 °C mm
²
/s
Pourpoint
°
C
Liebherr Hydraulic Basic 68
(standard)
-10 to +45 882 68 68 / 8.7 -24
Liebherr Hydraulic Basic 100
(hot countries)
+/- 0 to +55 882 100 100 / 11.5 -18
Multigrade oils
Liebherr Hydraulic HVI
(deep temperatures)
-20 to +40 877 46 (32-68) 46 / 8.3 -39
Liebherr Hydraulic Plus
(cryotemperature, bio-oil)
-25* to +45** 838 46 (32-68) 46 / 9.5 -45
Liebherr Hydraulic Plus Arctic
(cryotemperature, bio-oil)
(-40*** to +30)
1
828 15-46 7/25/2004 < -54
Liebherr Hydraulic Gear ATF
(hydraulic crane)
(-40 to +50)
2
(-25 to +50)
3
877 - 39 / 7.2 -45
Liebherr Hydraulic 37
(hydraulic crane)
(-25 to +50)
4
870 32-46 37 / 7.2 -39
Liebherr Hydraulic FFE 30
(hydraulic crane,
cryotemperature)
(-40 to +50)
4
844 15-46 7/28/2005 < -51
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
15
2.8.6 Viscosity chart
2 Technical data
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
16
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
17
3.1 Regulator types
This applies for all regulator types:
The following control and regulator types listed in the modular design principle can be ordered for the DPVO series:
3.1.1 Pressure regulator (output flow regulator)
- LU regulator, see chapter 3.2.1
- LS - DA regulator, see chapter 3.2.15
3.1.2 Electronic regulator
- EL1 - DA regulator, see chapter 3.2.2
- EL1 - DA1 regulator, see chapter 3.2.3
- EL1 - LS regulator, see chapter 3.2.4
3.1.3 Power regulator
- LR regulator, see chapter 3.2.5
- LR1 regulator, see chapter 3.2.6
- LR - LS regulator, see chapter 3.2.7
- LR1 - LS regulator, see chapter 3.2.8
- LR - LS1 regulator, see chapter 3.2.9
- LR1 - LS1 regulator, see chapter 3.2.10
- LR - SD2-DA regulator, see chapter 3.2.11
- LR1 - SD2-DA regulator, see chapter 3.2.12
- LR - SD2-DA1 regulator, see chapter 3.2.13
- LR1 - SD2-DA1 regulator, see chapter 3.2.14
- SL - SD1 regulator (for multi-circuit pumps), see chapter 3.2.16
- SL1 - SD1 regulator (for multi-circuit pumps), see chapter 3.2.17
Additional regulator types, upon request.
Note
Only one nominal size is illustrated, predominantly on the basis of nominal size 215, per regulator type or
function.
Special applications and special designs are not listed in this chapter.
Always use the information from the installation drawing provided or consult with Liebherr.
DANGER
The spring-guided reset in the regulating valve is not a safety device!
Impurities in the hydraulic system, such as e.g. abrasions or residual dirt from device or system
components, can lead to blockages in not defined positions of various regulator components.
Specifications of the machine operator can no longer be realised in some cases.
The implementation of a safety device for e.g. an emergency off is the responsibility of the device or
system manufacturer.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
18
3.2 Hydraulic diagrams
3.2.1 LU regulator
Main features
Electronic activation with pulse-width modulated control current (PWM signal 100-160 Hz, U= 24V, I
max
=750mA),
see chapter 3.3.8. The adjustment range is between 150 and 700 mA.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line J 518 M Regulated high pressure pReg
Fa
Auxiliary pressure connection
ISO 9974-1
S Suction line SAE
Fa2
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g oil filling or drai-
ning)
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
19
3.2.2 EL1 - DA regulator
Main features
Electronic activation with pulse-width modulated control current (PWM signal 100-160 Hz, U= 24V),
see chapter 3.3.3. The adjustment range is between 200 and 650 mA.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
20
3.2.3 EL1 - DA1 regulator
Main features
An oversteer signal (0-13.5 bar) externally supplied by the DA1 is present at connection X5.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg X5 DA1 oversteer signal ISO 9974-1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
21
3.2.4 EL1 - LS regulator
Main features
A pressure externally supplied by the LS is present at connection X2.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg X2 LS pressure ISO 9974-1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
22
3.2.5 LR regulator
Main features
Fixed LR setting as default.
Abbrevia-
tion
Name
Abbrevia-
tion
Benennung
A Work line SAE J518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
23
3.2.6 LR1 regulator
Main features
An oversteer pressure externally supplied by the LR is present at connection X3.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg X3 LR oversteer pressure connection ISO 9974-1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
24
3.2.7 LR - LS regulator
Main features
A pressure externally supplied by the LS is present at connection X2.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg X2 LS pressure ISO 9974-1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
25
3.2.8 LR1 - LS regulator
Main features
A pressure externally supplied by the LS is present at connection X2.
An oversteer pressure externally supplied by the LR is present at connection X3.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X2 LS pressure ISO 9974-1
M Regulated high pressure pReg X3 LR oversteer pressure connection ISO 9974-1
S Suction line SAE
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
26
3.2.9 LR - LS1 regulator
Main features
A regulating pressure pX4 externally supplied is present at connection X4.
A pressure externally supplied by the LS is present at connection X2.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X2 LS pressure ISO 9974-1
M Regulated high pressure pReg X4 p lowering pressure pX4
S Saugleitung SAE 3“
Note
The p lowering is currently only available as an option with the LR - LS regulator.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
27
3.2.10 LR1 - LS1 regulator
Main features
A pressure externally supplied by the LS is present at connection X2.
An oversteer pressure externally supplied by the LR is present at connection X3.
A regulating pressure pX4 externally supplied is present at connection X4.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X2 LS pressure ISO 9974-1
M Regulated high pressure pReg X3 LR oversteer pressure connection ISO 9974-1
S Suction line SAE 3” X4 p lowering pressure pX4
Note
The p lowering is currently only available as an option with the LR - LS regulator.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
28
3.2.11 LR - SD2 - DA regulator
Main features
A control pressure externally supplied by the SD is present at connection X1.
The adjustment range is between 5 and 30 bar max., other values upon request.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure pReg X1 SD- control pressure
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
29
3.2.12 LR1 - SD2 - DA regulator
Main features
A control pressure externally supplied by the SD is present at connection X1.
The adjustment range is between 5 and 30 bar max., other values upon request.
An oversteer pressure externally supplied by the LR is present at connection X3.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X1 SD control pressure
M Regulated high pressure pReg X3 LR oversteer pressure connection
S Suction line SAE
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
30
3.2.13 LR - SD2 - DA1 regulator
Main features
A control pressure externally supplied by the SD is present at connection X1. The adjustment range is between
5 and 30 bar max., other values upon request.
An oversteer signal (0-13.5 bar) externally supplied by the DA1 is present at connection X5.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X1 SD control pressure
M Regulated high pressure pReg X5 DA1 oversteer signal ISO 9974-1
S Suction line SAE
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
31
3.2.14 LR1 - SD2 - DA1 regulator
Main features
A control pressure externally supplied by the SD is present at connection X1.
The adjustment range is between 5 and 30 bar max., other values upon request.
An oversteer pressure externally supplied by the LR is present at connection X3.
An oversteer signal (0-13.5 bar) externally supplied by the DA1 is present at connection X5.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1(for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X1 SD control pressure
M Regulated high pressure pReg X3 LR oversteer pressure connection
S Suction line SAE X5 DA1 oversteer signal
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
32
3.2.15 LS - DA regulator
Main features
A pressure externally supplied by the LS is present at connection X2.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 S Suction line SAE
Fa
Auxiliary pressure connection
ISO 9974-1
T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
M Regulated high pressure preg X2 LS pressure ISO 9974-1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
33
3.2.16 SL - SD1 regulator
Main features
With two single pumps on the pump distribution gear (PVG) or one multi-circuit pump e.g. in tandem design.
A control pressure externally supplied by the SD is present at connection X1. The adjustment range is between
5 and 30 bar max., other values upon request.
A pHD signal supplied by another driving gear is present on connection X7.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X1 SD control pressure ISO 9974-1
M Regulated high pressure pReg X7 pHD signal (other driving gear) ISO 9974-1
S Suction line SAE
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
34
3.2.17 SL1 - SD1 regulator
Main features
With two single pumps on the pump distribution gear (PVG) or one multi-circuit pump e.g. in tandem design.
A control pressure externally supplied by the SD is present at connection X1.
The adjustment range is between 5 and 30 bar max., other values upon request.
A control pressure externally supplied by the SL is present at connection X3.
A pHD signal supplied by another driving gear is present on connection X7.
Abbrevia-
tion
Name
Abbrevia-
tion
Name
A Work line SAE J 518 T
Leakage oil ISO 9974-1 (for e.g. oil filling or
draining)
Fa
Auxiliary pressure connection
ISO 9974-1
X1 SD control pressure ISO 9974-1
M Regulated high pressure pReg X3 SL control pressure ISO 9974-1
S Suction line SAE X7 pHD signal (other driving gear) ISO 9974-1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
35
3.3 Regulator functions
- DA function / pressure cut-off, see chapter 3.3.1
- DA1 function /pressure cut-off with oversteer, see chapter 3.3.2
- EL function / electro proportional regulation, see chapter 3.3.3
- LR function / hyperbolic Power regulator, see chapter 3.3.4
- LR1 function /hyperbolic Power regulator with oversteer, see chapter 3.3.5
- LS function / load sensing, see chapter 3.3.6
- LS1 function / load sensing with p lowering, see chapter 3.3.7
- LU function / pressure regulation, see chapter 3.3.8
- SD function / control pressure proportional hydraulic regulation, see chapter 3.3.9
- SL function / total Power regulator, see chapter 3.3.10
- SL1 function / total Power regulator with oversteer, see chapter 3.3.11
3.3.1 DA function
The DA pressure regulation ensures the minimization or limitation (cut-off) of the volume flow of the axial piston unit
when reaching a fixed high pressure value pHD. The hydraulic system is protected against damage and overloading
by pivoting in the direction V
g min
.
It is only pivoted in the direction V
g min
until the volume flow of the axial piston unit, precisely at this pressure level,
corresponds to the consumer requirements.
The pressure regulator ensures with its function that the pressure is held constant even during changing volume
flows in the system. Thereby all internal and external losses due to leakage are balanced out.
Adjustment range XE approx. 30-400 bar.
Options
- Further internal design measures for vibration damping upon request.
- Pressure cut-off with oversteer function: see chapter 3.3.2
- DA regulator with V
g min
setting feasible. Value of the high pressure pHD* on the consumer corresponds
to the value pHD
max
of the pressure limiting valve at V
g min
.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
36
3.3.2 DA1 function
The DA1 function in the DA axle in the pressure regulator has the task of oversteering the fixed DA cut-off pressure
of pressure stage 1 (e.g. 250 bar) by means of an externally supplied control pressure pX5-pT on connection X5
and to therefore increase the high pressure to the fixed DA cut-off pressure of pressure stage 2
(e.g. 400 bar).
The oversteer function DA1 therefore corresponds to a two-stage pressure cut-off with 2 pressure stages.
- Pressure stage 1 e.g.: 250 bar or
- Pressure stage 2 e.g.: 400 bar
It is therefore suitable for systems or devices that either require an variable option for increasing power or are
subject to multiple uses. Examples are the working hydraulics in wheeled excavators and their drive hydraulics.
The effective control pressure on connection X5 is the difference of the total adjacent control pressure and the
housing pressure.
V*) With an amplification factor of 11, the DA cut-off pressure increases by approx. 11 bar if e.g. an
effective, external control pressure of 1 bar is present at connection X5. The amplification factor can vary and
must therefore be coordinated with Liebherr during the hydraulic pump configuration.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
37
3.3.3 EL function
The displacement volume V
g
of the axial piston unit is adjusted proportionally and infinitely variably via an
electromagnet during the EL function. The EL function is subordinate to the DA function, i.e. the control current
dependent EL function is only carried out under the set value for the pressure cut-off.
The EL function is designed with a positive characteristic curve as default.
Positive characteristic curve (EL1)
With an adjustment of the driving gear from V
g min
in direction V
g max
, the axial piston unit swivels with increasing
control current = I to a larger displacement volume V
g
.
High pressure pHD butts against the adjusting piston ring surface A
R
and the regulated high pressure pReg butts
against the adjusting piston base surface A
B.
If pReg x A
B
is greater than pHD x A
R
, the adjusting piston moves and
the axial piston unit swivels in direction V
g max
.
The hydraulic fluid required for this is taken from the high pressure pHD. With a low high pressure
pHD < 30 bar, the connection Fa must be supplied with an auxiliary pressure of approx. 30 bar in order to ensure
the regulation.
If the control signal is missing or incorrect, the axial piston unit swivels to V
g min
.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
38
Negative characteristic curve (EL2)
If the EL function is designed with a negative characteristic curve, the axial piston unit swivels to a larger
displacement volume V
g
when the control current is falling. High pressure pHD butts against the adjusting piston
ring surface A
R
and the regulated high pressure pReg butts against the adjusting piston base surface A
B.
If pReg x A
B
is greater than pHD x A
R
, the adjusting piston moves and the axial piston unit swivels in direction
V
g max
. The hydraulic fluid required for this is taken from the high pressure pHD.
With a low high pressure pHD < 30 bar, the connection Fa must be supplied with an auxiliary pressure of approx.
30 bar in order to ensure the regulation.
If the control signal is missing or incorrect, the axial piston unit swivels to V
g max
.
Therefore, the EL function with negative characteristic curve is suitable for e.g. safety functions for fan drives.
see chapter 3.2.1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
39
3.3.4 LR function
The LR function has the task of adjusting, or simultaneously limiting at constant speed n, the variable displacement
volume V
g
(the volume flow) of the axial piston unit depending on the pump high pressure pHD (the power
consumption) to the power characteristic curve of the drive motor.
An optimum power utilisation exists when the regulator runs along the hyperbola characteristic curve.
At the start of regulation of the axial piston unit, the working pressure pHD in the system increases to the value
of the start of regulation. Thereby the force on the volumetric flask 2 increases to lever 5. The spool 14 is moved
against the pressure spring 23 and opens the connection of the set chamber pReg to the tank T via a control
edge S2.
The axial piston unit therefore swivels back in direction V
g min
. Through the swivelling back of the axial piston unit,
the return piston 11 is axially moved against the pressure spring 22 via the connecting pin 95 in the swivel yoke
bearing pin. The line of force of the volumetric flask 2 thereby also moves to the lever 5 in the direction pivot point D.
The force of the lever 5 on the spool 14 gets smaller so that the pressure spring 23 pushes the spool 14
back into the neutral position again. The connection of the set chamber pReg to the tank T is interrupted.
The axial piston unit stays at a constant variable displacement volume, which corresponds to a constant power
consumption at the prevailing high pressure pHD.
Options
Combination with other regulator types
Oversteer LR1
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
40
3.3.5 LR1 function
Oversteer: The external regulating pressure pX3 is led via the connection X3 to the LR regulator axle and acts
against a volumetric flask in addition to the spring force of the LR regulator. In order to sustain the balance of forces,
the axial piston unit swivels in direction V
g max
to a higher power level.
The load limit regulator is independent of the speed of the drive motor.
When regulating pressure pX3 is increasing, the pressure for the regulator start of the axial piston unit also increases
proportionally. In order to stabilise the control circuit, oil from the LR control pressure is constantly discharged into
the housing of the pump via a nozzle.
3.3.6 LS function
Using load sensing systems, for example an EL/LS regulator, the dynamic characteristics of the control system
of variable hydraulic pumps can be further improved. The LS function is designed as a so-called load pressure
reporting system due to the pressure and volume flow adaptation to the current requirements of one or more
consumers.
An external control pressure pump provides the auxiliary pressure (30 bar) via the inlets Fa. Depending
on the pressure level, either the high pressure pHD or the auxiliary pressure of 30 bar is provided for the pump
regulation via a shuttle valve.
The volume flow of the axial piston unit is dependent on the cross-section of an external measuring orifice. A larger
cross-section leads to an adjustment of the pump in direction V
g max
. If the measuring orifice cross-section remains
the same, the volume flow is independent of the high pressure requirements of the consumer (pLS).
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
41
The highest high pressure pLS arising in the system in the lines to the actuators at the connection X2 is led back
to the LS regulator of the axial piston unit and is compared with the high pressure pHD. The regulator ensures
a constant value pLS (pHD minus pLS), as it has been previously set.
During the regulation (a consumer actuated), the spool 20 of the LS regulator is charged on one side by the high
pressure pHD and, on the opposite side, by the consumer-side pressure (LS pressure via connection X2) and
the pressure spring 39 (p setting). The pressure ratio on spool 2 determines its position and therefore
the pressurisation of the adjusting piston on the piston base side.
The set pressure pReg present on the adjusting piston base surface A
B
works against the high pressure pHD acting
on the adjusting piston ring surface A
R
. If necessary, the axial piston unit is regulated between Q
min
and Q
max.
Options
Combination with other regulator types
p lowering (LS1 regulator)
3.3.7 LS1 function
The goal of an active p lowering is a reduction of the variable displacement volume. Thereby the hydraulic system
reacts temporarily less sensitively to the operation of the pilot control device.
The external regulating pressure pX4-pT is lead via the connection X4 to the regulator 1 and acts against the spring
force of the LS axle 3. The set pressure difference p-LS therefore becomes smaller and the axial piston unit can
maintain this reduced p-LS with lower variable displacement volume (corresponds to a smaller swing angle). The
variable displacement volume is further reduced with increasing external regulating pressure pX4-pT.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
42
3.3.8 LU function
The LU function generates a constant pressure source, for which the pressure level pReg can be set infinitely
variably through a specified, variable magnet current. The LU function is designed as a so-called load pressure
reporting system due to the pressure and volume flow adaptation to the current requirements of a consumer.
The axial piston unit swivels with decreasing control current I to a greater displacement volume V
g
. High pressure
pHD butts against the adjusting piston ring surface A
R
and the regulated high pressure pReg butts against
the adjusting piston base surface A
B.
If pReg x A
B
is greater than pHD x A
R
, the adjusting piston moves and the axial piston unit swivels in direction
V
g max
. The hydraulic fluid required for this is taken from the high pressure pHD. With a low high pressure,
so pHD < 30 bar, the connection Fa must be supplied with an auxiliary pressure of approx. 30 bar in order to ensure
the regulation.
If the control signal is missing or incorrect, the axial piston unit swivels to V
g max
.
To protect the hydraulic product, the integrated DA function limits the high pressure pHD, e.g. during a power
failure, to a fixed value.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
43
3.3.9 SD function
The SD regulator is suitable for applications which require a proportionally regulated volume flow.
Positive characteristic curve (SD1)
With an adjustment of the driving gear from V
g min
in direction V
g max
, the axial piston unit swivels with increasing
SD control current to a larger displacement volume V
g
. High pressure pHD butts against the adjusting piston ring
surface A
R
and the regulated high pressure pReg butts against the adjusting piston base surface A
B.
If pReg x A
B
is greater than pHD x A
R
, the adjusting piston moves and the axial piston unit swivels in direction
V
gmax
. The hydraulic fluid required for this is taken from the high pressure pHD. With a low high pressure
of pHD < 30 bar, the connection Fa must be supplied with an auxiliary pressure of approx. 30 bar in order to ensure
the regulation.
If the control signal is missing or incorrect, the axial piston unit swivels to V
g min
.
Negative characteristic curve (SD2)
If the SD function is designed with a negative characteristic curve, the axial piston unit swivels to a larger
displacement volume V
g
when the SD control pressure is falling. High pressure pHD butts against the adjusting
piston ring surface A
R
and the regulated high pressure pReg butts against the adjusting piston base surface A
B.
If pReg x A
B
is greater than pHD x A
R
, the adjusting piston moves and the axial piston unit swivels in direction
V
gmax
. The hydraulic fluid required for this is taken from the high pressure pHD.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
44
With a low high pressure of pHD < 30 bar, the connection Fa must be supplied with an auxiliary pressure of approx.
30 bar in order to ensure the regulation.
If the control signal is missing or incorrect, the axial piston unit swivels to V
g max
.
3.3.10 SL function
The SL function is a power regulator for regulating the delivery rate of two identical, variable axial piston units, which
are powered by a common drive source and which convey in two different circuits with different pressures.
Each of the axial piston units has its own regulator, which is hydraulically coupled (connection X7) and provides
total power regulation. If the pumps are in SL regulation, their speed, swing angle and therefore the variable
displacement volume are identical.
Each total pressure is assigned a very specific swing angle. In the regulator, the volume flows of both axial piston
units are indeed reduced by the same amount, but the pressures can increase up to the power limit.
The total of the two hydraulic outputs shall not exceed the installed drive motor power.
The SD function with SL-SD regulator is only available with a positive characteristic curve. It limits the maximum
variable displacement volume for each axial piston unit individually.
Options
Oversteer (SL1 function)
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
45
3.3.11 SL1 function
Oversteer: The external regulating pressure pX3 is led via the connection X3 to the SL regulator axle and acts
against a volumetric flask in addition to the spring force. In order to sustain the balance of forces, the axial piston
unit swivels in direction V
g min
to a lower power level.
When regulating pressure pX3 is increasing, the pressure for the regulator start of the axial piston unit also
decreases proportionally.
In order to stabilise the control circuit, oil from the regulating pressure pX3 is constantly discharged into the housing
of the pump via a nozzle.
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
46
3.4 Electrical components
3.4.1 Proportional magnet
General information
- With proper assembly: Protection class IP 67
- Nominal pressure static: 350 bar
- Power characteristic diagram with PWM current: 100Hz
- Limit current I
G
: 0.7 A- 100% ED
- Rated voltage U
N
: 24 V
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
47
3.4.2 Pressure reduction valve (DRE)
General information
- Rated voltage U: 24 V
- Current I
Max.
: 750 mA
- Supply pressure p
max.
: 50 bar
- Magnet characteristic curve: flat around the regulating position
3 Control and regulator types
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
48
3.4.3 Sensory analysis
Rotation angle sensor
General information
- Voltage supply: 5 VDC
- Measurement range: -27° to + 27°
- Output signal: 0.5VDC to 4.5 VDC
- Working temperature: -40°C to +125°C
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
0 without sensor
W with rotation angle sensor
Note
The rotation angle cannot be retrofitted and must be taken into account during the reconfiguration
of the DPVO.
4 Installation conditions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
49
Depending on installation location and installation variant, due to gravity, the net weight and the housing pressure
must be calculated with influences of the regulation or regulator, such that the system settings must be readjusted
in the device if necessary.
The suction lines and leakage liquid lines must flow under the minimum liquid level in the tank in every installation
location in order to prevent foaming.
The oil tank must be designed in such a way that the hydraulic oil sufficiently cools off during the circulation and
any impurities settle on the bottom of the tank.
Note
Liebherr distinguishes between three installation variants (A, B and C) and six installation locations
(from 1 to 6) for the axial piston units.
Note
Recommended installation variant(s):
Under-the-tank installation A
Installation variant(s) to be avoided:
Over-the-tank installation B, since the pump can empty after longer standstill times via the leakage liquid
line (for example, due to air intake via the shaft lip seal) or via the work line (for example, due to gap
losses).
Note
Recommended installation location(s):
Drive shaft horizontally, suction port down, regulator up
Installation location(s) to be avoided:
Regulator down, drive shaft vertically with installation location 3 see chapter 4.2.
4 Installation conditions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
50
4.1 Installation variants
Under-the-tank installation "A": Axial piston unit is installed under the minimum liquid level of the tank.
Over-the-tank installation "B": Axial piston unit is installed over the minimum liquid level of the tank.
Note
The installation variant with the tank above the pump is always to be preferred since:
- Hydraulic oil (under hydrostatic pressure) is always present at suction port S during inactivity
- The housing can empty itself into the tank
A design with a charge pump is not possible with over-the-tank installation since the charge pump
cannot suction any hydraulic oil.
Abbreviation Name Remark
4 Baffle To slow down the hydraulic fluid in the tank
B Distance
Between the suction port and the leakage oil
connection in the tank (the greater the better)
H
Maximum suction lift (only with over-the-tank
installation)
750 mm
L Leakage oil connections -
M
Minimum distance of the ends of the lines
to the bottom of the tank
115 mm
S Suction line connection -
T Tank -
4 Installation conditions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
51
Tank installation "C": Axial piston unit is installed under the minimum liquid level in the tank. This tank installation
variant is not permitted for axial piston units with electrical components, e.g. electric proportional magnet or speed
sensor.
*) If the leakage oil line is laid under the oil level in such a way that it leads over the highest point of the pump,
the housing emptying into the tank can be prevented.
Abbreviation Name Remark
4 Baffle To slow down the hydraulic fluid in the tank
B Distance
Between the suction port and the leakage oil
connection in the tank (the greater the better)
L Leakage oil connections -
M
Minimum distance of the ends of the lines
to the bottom of the tank
115 mm
S Suction line connection -
T Tank -
4 Installation conditions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
52
4.2 Installation locations
In each of the three installation variants, there are six possible installation locations. As a general rule, make sure
for the installation location of the DPVO that the crankshaft of the drive motor aligns with the drive shaft
of the DPVO.
ATTENTION
An air cushion in the installation area or on the rotary shaft lip seal, particularly with installation locations
1 and 3, can lead to damage of the hydraulic unit due to e.g. "running hot". Make sure that the pump
housing is completely filled with hydraulic fluid and is ventilated during commissioning and operation.
Check the hydraulic fluid in the housing area regularly, carry out a recommissioning if necessary.
Note
In order to prevent an emptying of the axial piston unit in installation location 3 and installation variant B,
a non-return valve with an opening pressure of a max. of 0.5 bar can be installed in the leakage liquid line
upon consultation with Liebherr.
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
53
5.1 NG 108 (direction of rotation right)
LR - LS and LR1 - LS
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
54
5.1.1 NG 108 (direction of rotation right) Combination possibilities with other regulator types
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
Note
Dimensions control mode LR - LS and LR1 - LS, see chapter 5.1.
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
55
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
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
56
5.1.2 NG 108 (direction of rotation) right mounting flange
SAE D (SAE J744)
Diesel engine flange SAE 2 (SAE J617)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
24
12
14
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
57
5.1.3 NG 108 (independant direction of rotation) shaft end
DIN 5480 gear shaft W40x2x18x9g
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
1
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
58
5.2 NG 140 (direction of rotation right)
LR - LS and LR1 - LS
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
59
5.2.1 NG 140 (direction of rotation right) Combination possibilities with other regulator types
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
Note
Dimensions control mode LR - LS and LR1 - LS, see chapter 5.2
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
60
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
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
61
5.2.2 NG 140 (direction of rotation right) mounting flange
SAE D (SAE J744)
Diesel engine flange SAE 2 (SAE J617)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
24
12
14
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
62
5.2.3 NG 140 (independant direction of rotation) shaft end
DIN 5480 gear shaft W45x2x21x9g
ANSI B92.1a gear shaft 1 3/4 in 13T 8/16DP
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
1
2
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
63
5.3 NG 165 (direction of rotation right)
LR - LS and LR1 - LS
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
64
5.3.1 NG 165 (direction of rotation right) Combination possibilities with other regulator type
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
Note
Dimensions control mode LR - LS and LR1 - LS, see chapter 5.3.
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
65
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
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
66
5.3.2 NG 165 (direction of rotation right) mounting flange
SAE D (SAE J744)
Diesel engine flange SAE 2 (SAE J617)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
24
12
14
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
67
5.4 NG 165 (direction of rotation left)
LR - LS and LR1 - LS
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
68
5.4.1 NG 165 (direction of rotation left) Combination possibilities with other regulator types
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
Note
Dimensions control mode LR - LS and LR1 - LS, see chapter 5.4.
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
69
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
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
70
5.4.2 NG 165 (direction of rotation left) mounting flange
SAE D (SAE J744)
Diesel engine flange SAE 2 (SAE J617)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
24
12
14
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
71
5.4.3 NG 165 (independent direction of rotation) shaft end
DIN 5480 gear shaft W45x2x21x9g
ANSI B92.1a gear shaft 1 3/4 in 13 T 8/16DP
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
1
2
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
72
5.5 NG 215 (direction of rotation right)
LR - LS and LR1 - LS
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
73
5.5.1 NG 215 (direction of rotation right) Combination possibilities with other regulator types
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
Note
Dimensions control mode LR - LS and LR1 - LS, see chapter 5.5.
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
74
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
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
75
5.5.2 NG 215 (direction of rotation right) mounting flange
SAE E (SAE J744)
Diesel engine flange SAE 2 (SAE J617)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
24
12
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
76
5.5.3 NG 215 (independent direction of rotation) shaft end
DIN 5480 gear shaft W50x2x24x9g
ANSI B92.1a gear shaft 1 3/4 in 13T 8/16DP
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
1
2
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
77
5.6 NG 215i (direction of rotation left)
LR - LS and LR1 - LS
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
78
5.6.1 NG 215i (direction of rotation left) Combination possibilities with other regulator types
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
Note
Dimensions control mode LR - LS and LR1 - LS, see chapter 5.6.
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
79
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
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
80
5.6.2 NG 215i (direction of rotation left) mounting flange
SAE E (SAE J744)
Diesel engine flange SAE 2 (SAE J617)
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
24
12
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
81
5.6.3 NG 215i (independent direction of rotation) shaft end
DIN 5480 gear shaft W50x2x24x9g
ANSI B92.1a gear shaft 1 3/4 in 13T 8/16DP
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
1
2
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
82
5.7 Through drive dimensions ANSI B92.1a
5.7.1 SAE B / ANSI B92.1a-1976 7/8“ 13T 16/32 DP
5.7.2 SAE BB / ANSI B92.1a-1976 1“ 15T 16/32 DP
5.7.3 SAE C / ANSI B92.1a-1976 1 1/4“ 14T 12/24 DP
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
Optional: Vertical threaded hole
B11D 2-hole
B12D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
108 12 13 35.1 45.1 291
M12x1.75; 18 deep M12x1.75; 18 deep
140 12 15 33 43 312
M12x1.75; 18 deep M12x1.75; 18 deep
165 12 16 34 44 325.3
M12x1.75; 19 deep M12x1.75; 19 deep
215 12 12.5 33.5 44.5 355
M12x1.75; 18 deep M12x1.75; 18 deep
215i 11 12 43.2 58 429
M12x1.75; 20 deep M12x1.75; 20 deep
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
Optional: Vertical threaded hole
B21D 2-hole
B22D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
108 12 13 38 50 291
M12x1.75; 18 deep M12x1.75; 18 deep
140 12 13 37.9 49.9 312
M12x1.75; 18 deep M12x1.75; 18 deep
165 12 14 38.9 50.9 325.3
M12x1.75; 19 deep M12x1.75; 19 deep
215 12 12.5 37.5 49.5 355
M12x1.75; 18 deep M12x1.75; 18 deep
215i 11 12 44.5 58 429
M12x1.75; 20 deep M12x1.75; 20 deep
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
Optional: Vertical threaded hole
C11D 2-hole
C12D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
108 15 17.4 47.4 59.4 315 M16x2 ; 24 deep M12x1.75 ; 24 deep
140 15 16 47.4 59.4 336 M16x2 ; 24 deep M12x1.75 ; 24 deep
165 15 17 48.4 60.4 349.3 M16x2 ; 24 deep M12x1.75 ; 24 deep
215 18 18 47.5 59.5 401 M16x2 ; 28 deep M12x1.75 ; 28 deep
215i 18 16 58 58 429 M16x2 ; 24 deep M12x1.75 ; 24 deep
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
83
5.7.4 SAE CC / ANSI B92.1a-1976 1 1/2“ 17T 12/24 DP
5.7.5 SAE D / ANSI B92.1a-1976 1 3/4“ 13T 8/16 DP
5.7.6 SAE E / ANSI B92.1a-1976 1 3/4“ 13T 8/16 DP
x available
oupon request
- not possible
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
Optional: Vertical threaded hole
C21D 2-hole
C22D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
108 o o o o o o o
140 15 16 53.8 65.8 336 M16x2 ; 24 deep M12x1.75 ; 24 deep
165 15 17 54.8 66.8 349.3 M16x2 ; 24 deep M12x1.75 ; 24 deep
215 18 18 53.5 65.5 401 M16x2 ; 28 deep M12x1.75 ; 28 deep
215i 18 18 66 66 437 M16x2 ; 24 deep M12x1.75 ; 24 deep
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
D11D 2-hole
D12D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
108 o o o o o o o
140 15 22 65.5 77.5 351 M20x2.5 ; 39 deep M20x2.5 ; 39 deep
165 15 22 65.5 77.5 356.3 M20x2.5 ; 31 deep M20x2.5 ; 31 deep
215 14 22 66.5 78.5 414 M20x2.5 ; 41 deep M20x2.5 ; 41 deep
215i 14 22 75 78.45 449.5 M20x2.5 ; 25 deep M20x2.5 ; 25 deep
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
E11D 2-hole
E12D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
215 17 22 66.5 78.5 414 M24x3 ; 41 deep M24x3 ; 41 deep
215i 17 22 75 78.5 449.5 M24x3 ; 25 deep M24x3 ; 25 deep
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
84
5.8 Through drive dimensions DIN 5480
5.8.1 SAE D / W40x2x18x9g / DIN 5480
5.8.2 SAE D / W45x2x21x9g / DIN 5480
5.8.3 SAE E / W50x2x24x9g / DIN 5480
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
DPV O / 1 A 0
L*) to mounting flange
D31D 2-hole
D32D 4-hole
D33D 2 and 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
108 15 20 51 63 330 M20x2.5 ; 24 deep M20x2.5 ; 24 deep
140 15 20 51 63 351 M20x2.5 ; 24 deep M20x2.5 ; 24 deep
165 15 24 53 64 349.3 M20x2.5 ; 24 deep M20x2.5 ; 24 deep
215 14 23.5 52.5 63.5 414 M20x2.5 ; 41 deep M20x2.5 ; 41 deep
215i 14 19 60.2 71.2 442.2 M20x2.5 ; 44.2
deep
M20x2.5 ; 44.2 deep
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
D41D 2-hole
D42D 4-hole
D43D 2 and 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
140 15 20 57 69 351 M20x2.5 ; 24 deep M20x2.5 ; 24 deep
165 15 19 56 68 349.3 M20x2.5 ; 24 deep M20x2.5 ; 24 deep
215 14 19.2 57.2 69.2 414 M20x2.5 ; 41 deep M20x2.5 ; 41 deep
215i 14 17.7 60.2 71.2 442.2 M20x2.5 ; 44.2 deep M20x2.5 ; 44.2 deep
L*) to mounting flange
2*) o-ring (included in the scope of delivery)
E31D 2-hole
E32D 4-hole
NG W1 W2 W3 W4 L G1 (2hole) G2 (4hole)
215 17 19.2 57 69 414 M24x3 ; 41 deep M20x2.5 ; 41 deep
215i 17 14.5 57 68 439 M24x3 ; 41 deep M20x2.5 ; 41 deep
5 Dimensions
Axial piston pump
DPVO 108 to 215
Date: 04.2014
Version: 1.2
ID no.: 10150821
85
5.9 Multi-circuit pump in tandem design
General information
The base axial piston pump P1 can be combined with an additional axial piston pump P2 through an adapter plate
10 and a coupling ferrule 11. The resulting multi-circuit pump has its own identification number. The type code must
be filled out for both single pumps, with a hyphen between the two type codes.
5.9.1 Dimensions of the multi-circuit pump in tandem design
x available
oupon request
- technically not possible
L) Total length in mm
Abbreviation Name Abbreviation Name
P1 Base pump 10 Adapter
P2 Attachment pump 11 Coupling ferrule
L
Total length of multi-circuit pump
in mm
Note
Upon request, multi-circuit pumps consisting of three single pumps are feasible.
NG
P1
NG P2
108 140 165 215 215i
108
o (L = 621) - - - -
140
o (L = 642) o (L = 663) - - -
165
o (L = 640.3) o (L = 661.3) x (L = 674.6) - -
215
o (L = 705) o (L = 726) o (L = 739.3) o (L = 787) -
215i
- (L = 733.2) - (L = 754.2) o (L = 767.5) - (L=816) x (L = 837)
Note
Total length L available for tandem combination with driving shaft pump 2 = DIN 5480.
Vertrieb
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
Entwicklung / Produktion
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
Subject to changes without prior notice in the course of technical development.
©: Information and images in this data sheet may neither be reproduced or disseminated nor used for competition
purposes. All copyright rights according to the law are expressly reserved by Liebherr, even in the event of property
right applications.
The user is not released from his obligation to complete his own evaluations and tests by the information in this data
sheet.
An example configuration (DPVO 215 LR-LS) is predominantly illustrated in this data sheet; if not otherwise stated,
the illustrations are of this configuration. The product delivered to you can therefore differ from the figures.
Deviations are likewise possible with data and values in this data sheet; these only serve for preselecting the product
configuration and are not binding. If nothing else is disclosed, the values of the example configuration (DPVO 215
LR-LS) are always stated. Always use the values from the installation drawing provided to you.
Warranty and liability conditions of the general terms and conditions of Liebherr Machines Bulle SA and Liebherr-
Components AG are not extended by the preceding information.
