The sturdy axial piston motors of series DMVA were
developed especially for use in mobile machinery for
heavy-duty environmental conditions.
The swash plate design with large pivoting angle is ideal
for applications that require variable displacement.
The sophisticated modular system allows the DMVA
base motors to be combined as required with various
controls, through-drives, mounting flanges, shaft ends,
and e.g. a holding brake.
It is possible to configure two flange-mounted axial
piston motors into a double motor tandem configura-
tion. This is described in a separate data sheet, ID No.:
11372600.
Applies to:
DMVA 108
DMVA 165
DMVA 215
DMVA 355
DMVA 370
Features:
Series D
Various control types available
Open and closed circuit
Nominal pressure p
N
= 450 bar
Maximum pressure p
max
= 500 bar
Document identification:
ID number: 11378482
Issue: 09/2015
Applies to: DMVA 108 to 370
Authors: Liebherr - Departments ED5 / HR1
Version: 1.1
Flange-mounted axial piston motor with
adjustable displacement: DMVA
Data sheet
Table of contents
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
2
1 Type code 4
2 Technical data 6
2.1 Table of values 6
2.2 Rotation direction 7
2.3 Permissible pressure range 7
2.4 Shaft seal ring 9
2.5 Flow direction 9
2.6 Housing flushing 10
2.7 Hydraulic fluids 11
3 Actuation and control types 15
3.1 Control types 15
3.2 Standard hydraulic charts 16
3.3 Controls with brake valve (BV) 18
3.4 Controls with flush 20
3.5 Controls with secondary pressure limiting valve 21
3.6 Control functions 22
3.7 Electrical components 27
4 Installation conditions 31
4.1 Installation variants 32
4.2 Mounting positions 33
5 Dimensions 34
5.1 NG 108 / EL / EL1 control 34
5.2 NG 108 / EL-DA control with brake valve 35
5.3 NG 108 / HD control with brake valve 36
5.4 NG 108 / SD-DA control 37
5.5 NG 108 Mounting flange 38
5.6 NG 108 Shaft end 38
5.7 NG 165 / EL control 39
5.8 NG 165 / EL-DA control 40
5.9 NG 165 / EL-DA control with brake valve 41
5.10 NG 165 / HD control with brake valve 42
5.11 NG 165 / SD-DA control 43
5.12 NG 165 Mounting flange 44
5.13 NG 165 Shaft end 44
5.14 NG 215 / EL control 45
5.15 NG 215 / EL-DA control with brake valve 46
5.16 NG 215 / EL-DA control with through-drive 47
3Date: 09/2015
Version: 1.1
ID No.: 11378482
Table of contents
Flange-mounted axial piston motor
DMVA 108 to 370
5.17 NG 215 Mounting flange 48
5.18 NG 215 Shaft end 48
5.19 NG 355 / 370 / EL control 49
5.20 NG 355 / 370 / EL-DA control with through-drive 50
5.21 NG 355 / 370 / SD control 51
5.22 NG 355 / 370 / SD-DA control 52
5.23 NG 355 / 370 / ZH control 53
5.24 NG 355 / 370 Mounting flange 54
5.25 NG 355 / 370 Shaft end 54
5.26 Through-drive DIN 5480 55
1. Motor type
Type series D / Motor / Variable / Flange-mounted DMVA
2. Circuit type
closed G
open O
3. Nominal size (NG) = displacement V
g max
in cm
3
NG 108 165 215 355 370
4. Residual displacement V
g
min
cm
3
Value entered in cm
3
5. Actuation / control type
Electro-proportional (negative characteristic line) x x x x x EL
Electro-proportional (positive characteristic line) x - - - - EL1
Electro-proportional (negative characteristic line) / pressure control x x x x - EL - DA
Hydraulic adjustment / high-pressure dependent x x - - - HD
Hydraulic-proportional (negative characteristic line) - - - - x SD
Hydraulic-proportional (negative characteristic line) / pressure control x x - x - SD - DA
Hydraulic adjustment, twin setting / hydraulically actuated - - - x - ZH
6. Version
7. Direction of rotation with view of the drive shaft
Alternating W
8. Mounting flange
Mounting flange ISO 3019-2 x x x - - 31
Mounting flange / custom-made product - - x x x 51
9. Shaft end
Splined shaft DIN 5480 1
1 Type code
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
4
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
1
1 Type code
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
1 Type code
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
5
* can be combined, separated by dash e.g.: D-W
x Available
-on request
NG 108 165 215 355 370
10. Connections (SAE J518)
High-pressure connection 6000 PSI A
11. Accessories
No attachment 0
12. Through-drive
No through-drive (closed) x x x x - 0
Custom through-drive - - x x x K
13. Valve
No valve x x - - - 0
Flush / closed circuit - x x x x SO
Flush / open circuit - x - x - MO
Flush / open-loop circuit with high-pressure relief - - - x - MH
High-pressure relief with brake valve, open-loop circuit x x x - - BH
14. Sensor system
Without sensor x x x x x 0
Motor speed sensor x x x x x D*
Angle sensor x x x - - W*
Note
Contact addresses for queries can be found on the reverse side of this document.
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
6
2.1 Table of values
Note
The values provided (maximum data) are theoretical values, rounded, without efficiencies and tolerances.
Nominal sizes 108 165 215 355 370
Displacement
V
g max
cm
3
107.7 167.8 216.5 355.6 371.2
V
g min
cm
3
0 - 80% from V
g max
, value indicated in
[cm
3
/U]. Other values on request.
Flow rate at n
max
qv
max
l/min 361 503 584 853 891
Max. speed at V
g max
and Δp
max
n
max
rpm 3350 3000 2700 2400 2400
Max. speed at V
g max
= 0.65 and Δp = 200 bar n
max
rpm 5125 4590 4100 3670 3000
Torque for V
g max
and Δp = 430 bar M
max
Nm 737 1149 1481 2433 2540
Torque constant at V
g max
M
K
Nm/bar 1.714 2.67 3.446 5.66 5.908
Drive power for qv
max
and Δp = 430 bar p
max
kW 259 361 419 611 638
Torsional stiffness
Nm/rad * 10
3
266 353 511 961 961
Hydraulic drive moment of inertia
J
TW
kgm
2
0.015 0.0313 0.047 0.13 0.13
Mass (approx.) m kg 70 80 120 195 195
Max. radial force
F
q max
N
The permissible forces result from the
load collective. Please contact Liebherr
when planning a belt drive.
Max. axial load
F
a± max
N Values on request from Liebherr.
Note
Through-drives on single motors currently only possible on NG 215, 355 and 370.
2 Technical data
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
7
2.2 Rotation direction
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
DMVA / 1 W A
2.3 Permissible pressure range
2.3.1 Operating pressure
Operating pressure on port A / B
Nominal sizes
108 165 215 355 370
Nominal pressure (sustained operation)
p
N
Bar 450 450 450 450 450
Maximum pressure (short term)
p
max
Bar 500 500 500 500 500
Note
Definition of “short term”: unless stated otherwise: t < 1s, t
total
= 300 Oh.
The direction of rotation is provided with a view of the drive
shaft, as depicted in the illustration.
R
Right = Clockwise
L
Left = Counterclockwise
W
Alternating = Depending on control signal on A / B
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
8
2.3.2 Minimum operating pressure
In order to avoid cavitation at maximum engine speed in thrust mode, a minimum pressure pHD
min
= 8 bar must be
applied on the operating circuit, measured on the low-pressure side, e.g. on M1 or M2.
These values depend on external circumstances, such as the type of hydraulic oil used or the temperature, and
n
eed to be calculated for each specific case. Values upon request.
2.3.3 Housing pressure, leakage-oil pressure
The housing or leakage oil pressure pL must not exceed maximum values, see chapter 2.4.3 for threshold values.
The number of leakage oil connections T can vary depending on the application.
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
9
2.4 Shaft seal ring
2.4.1 General
The radial shaft seals (RWDR) from Liebherr are special sealing elements that allow a specific
housing pressure.
The operating conditions must be observed to ensure that the tribological system functions optimally.
Depending on the circumferential speed, oil temperature,
lubricant, and pressure buildup in the housing, the seal-
temperature can be approx. 20°C to 40°C above the leakage oil temperature of a hydraulic axial piston unit.
2.4.2 Temperature range
The FKM radial shaft seal ring is rated for housing temperatures from -25°C to +115°C.
Please consult customer service for applications below -25°C.
2.4.3 Rated pressure load for hydraulic motors
The service life of the radial shaft seal ring is influenced by the engine speed “n” of the axial piston unit and the
le
akage oil pressure “p
L
”.
The sustained leakage oil pressure “p
L
” should not exceed 3 bar
abs.
at operating pressure. The maximum rated
leakage oil pressure is 6 bar absolute at reduced engine speed (see chart).
Short-term pressure peaks of max. 10 bar
abs.
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.
Shaft diameter (mm) Nominal size
45
108
50
165
60
215
70
355 / 370
Permissible pressure p
abs.
max.
Engine speed n in rpm
2.5 Flow direction
The direction of flow depends on the orientation of the process connections (laterally on the connection plate or in
back) and their labeling. The direction of flow is marked on the installation drawing.
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
10
2.6 Housing flushing
Under various operating conditions, such as a very low volumetric flow rate over an extended period, a boundary
value increase in temperature could occur in the housing. See chapter 2.7.
Depending on the hydraulic system design, a flushing circuit 1 may be required for cooling and filtration that directs
the
“hot” hydraulic oil to an external cooling unit, where the oil is cooled and then fed back into the hydraulic system.
The flushing quantity Q
V
in l/min must be individually set for each nominal size in connection with the application
and is the responsibility of the device or system manufacturer.
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
11
2.7 Hydraulic fluids
2.7.1 General
The selection of the suitable hydraulic fluid is substantially influenced by the expected operating temperature
depending 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.
ATTENTION
Mixing various mineral oil press
ure fluids is prohibited!
2.7.2 Operating limits
Depending on the operating temperature, the appropriate oil must be selected taking into account the viscosity
c
haracteristics 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., 7 mm
2
/s).
- The shear stability (KRL) has to be
observed for multigrade oils.
*) Open circuit: relative to reservoir temperature
Closed circuit: relative to circuit 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; v
alues upon request.
Note
The hydraulic unit must be filled with oil and bled prior to initialization.
This must be inspected during operation and after extended downtime, and must be repeated as
necessary!
2.7.4 Filtering
- To maintain the specified pu
rity 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 interva
ls of the oil filter and for the entire oil circuit depend on the device usage,
and are found in the device-specific operating manual.
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
12
2.7.5 Comparative oil values
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
(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
Multi-range oils
Liebherr Hydraulic HVI
(low temperatures)
-20 to +40 877 46 (32-68) 46 / 8.3 -39
Liebherr Hydraulic Plus
5
(low temperatures)
-25* to +45** 838 46 (32-68) 46 / 9.5 -45
Liebherr Hydraulic Plus Arctic
5
(low temperatures)
(-40*** to +30)
1
828 15-46 7/25/2004 < -54
Liebherr Hydraulic Gear ATF
(crane hydraulics)
(-40 to +50)
2
(-25 to +50)
3
877 - 39 / 7.2 -45
Liebherr Hydraulic 37
(crane hydraulics)
(-25 to +50)
4
870 32-46 37 / 7.2 -39
Liebherr Hydraulic FFE 30
(crane hydraulics,
low temperatures)
(-40 to +50)
4
844 15-46 7/28/2005 < -51
*) Preheating is mandatory at temperatures below -25°C.
**) Applicable to Liebherr Mining Excavators: -40°C to +45°C (at temperatures below -25°C, the use of the
appropriate Liebherr Arctic Kit must be used).
***)Preheating is mandatory 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.
5
) The two high-performance oils Liebherr Hydraulic Plus and Liebherr Hydraulic Plus Arctic on the basis of
polyalphaolefines (PAO) from the group of HEPR oils
are bio-degradeable (bio-degradeability (21 days, also
called primary degradation) iaw.
CEC-L-103-12 ≥ 60%) and are suited for use in environmentally sensitive
regions.
Note
Primary degradation: The test method directly measures oil dispersion up to the degradation phase of
water solubility
.
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
13
2.7.6 Viscosity diagrams
2 Technical data
Flange-mounted motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
14
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
Note
Only one nominal size is illustrated per control ty
pe or function, primarily based on the nominal size 165.
Special applications and custom-made products are not listed in this section.
Always use the information from the delivered installation drawing or consult with Liebherr.
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
15
3.1 Control types
Applicable to all control types:
DANGER
The spring-guided return in the control valve is not a safety device!
Impurities in the hydraulic system such as wear or residual contamination from device or system
co
mponents can result in blockages in undefined places of the various controller components.
Under certain circumstances, machine operator control inputs can no longer be executed.
The realization of a safety dev
ice, such as an emergency-off, is the responsibility of the device or
system manufacturer.
The following modular activation and control types can be ordered for the DMVA type series:
3.1.1 Hydraulic/mechan
ical controls
-HD control, see chapter 3.2.1
-SD control, see chapter 3.2.1
- SD-DA control, see chapter 3.2.1
-ZH control, see chapter 3.2.1
3.1.2 Hydraulic/electronic controls
- EL control, see chapter 3.2.2
- EL1 control, see chapter 3.2.2
- EL-DA control, see chapter 3.2.2
Other control types on request.
3 Actuation and control types
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
16
3.2 Standard hydraulic charts
3.2.1 Hydraulic / mechanical controls
Abbreviation Designation Abbreviation Designation
X1 Control-pressure connection ISO 9974-1 M1, M2
High-pressure measuring connections
ISO 9974-1
A, B Working ports SAE J 518 M3
Measurement port actuation pressure
ISO 9974-1
T1, T2, T3 Leakage oil connection ISO 9974-1
Note
Oil entry for port A: Direction of rotation =
left
Oil entry for port B: Direction of rotation = right
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
17
3.2.2 Electronic controllers
Abbreviation Designation Abbreviation Designation
A, B Working ports SAE J 518 M3
Measurement port actuation pressure
ISO 9974-1
T1, T2, T3 Leakage oil connection ISO 9974-1 E1 DRE connector AMP Junior Timer, 2P
G Actuation pressure supply ISO 9974-1 M4
Control pressure measuring connection
ISO 9974-1
M1, M2
High-pressure measuring connections
ISO 9974-1
Note
Oil entry for port A: Direction of rotation =
left
Oil entry for port B: Direction of rotation = right
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
18
3.3 Controls with brake valve (BV)
Note
The following applies to brake valves:
Open circuit = flushing nozzle instead of flushing valve
Closed circuit = flushing valve
Abbreviation Designation Abbreviation Designation
X1 Control-pressure connection ISO 9974-1 M1, M2
High-pressure measuring connections
ISO 9974-1
A, B Working ports SAE J 518 M3
Measurement port actuation pressure
ISO 9974-1
T1, T2, T3 Leakage oil connection ISO 9974-1 E1 DRE connector AMP Junior Timer, 2P
M4
Control pressure measuring connection
ISO 9974-1
Note
Oil entry for port A: Direction of rotation =
left
Oil entry for port B: Direction of rotation = right
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
19
3.3.1 Brake valve options
Application-specific, no bypass
Application-specific, with bypass in the check valve (cooling function)
Abbreviation Designation
A, B Working ports SAE J 518
Note
Oil entry for port A: Direction of rotation =
left
Oil entry for port B: Direction of rotation = right
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
20
3.4 Controls with flush
Note
The following applies to flushing:
Open circuit = only without brake valve
Closed circuit = flushing mandatory
Open circuit
Closed circuit
Abbreviation Designation Abbreviation Designation
A, B Working ports SAE J 518 M1, M2
High-pressure measuring connections
ISO 9974-1
T1, T2, T3 Leakage oil connection ISO 9974-1 M3
Measurement port actuation pressure
ISO 9974-1
X1 Control-pressure connection ISO 9974-1
Note
Oil entry for port A: Direction of rotation =
left
Oil entry for port B: Direction of rotation = right
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
21
3.5 Controls with secondary pressure limiting valve
Note
The following applies to cont
rols with secondary pressure limiting valve:
Used only in hydraulic products with open circuit.
Simple configuration
Configuration with add-on phase
Abbreviation Designation Abbreviation Designation
T1, T2, T3 Leakage oil connection ISO 9974-1 M3
Measurement port actuation pressure
ISO 9974-1
M4
Control pressure measuring connection
ISO 9974-1
E1 DRE connector AMP Junior Timer, 2P
Note
Oil entry for port A: Direction of rotation =
left
Oil entry for port B: Direction of rotation = right
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
22
3.6 Control functions
- HD function / high-pressure dependent hydraulic adjustment with override, see chapter 3.6.1
- SD function / control-pressure proportional hydraulic displacement, see chapter 3.6.2
- ZH function / hydraulically actuate
d adjustment (dual settings), see chapter 3.6.3
- DA function / pressure regulation, see chapter 3.6.4
- EL function / electro-proportional displacement, see chapter 3.6.5
Note
The following applies to all control functions:
V
g min
= low torque “M” = high engine speed “n”
V
g max
= high torque “M” = low engine speed “n”
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
23
3.6.1 HD function
In the HD control, the
displacement V
g
in the control range is proportionally dependent on the operating pressure
pHD applied on the high pressure port A / B (supplied by the hydraulic pump).
Characteristic curve
High pressure pHD from the hydraulic pump is supplied to the high pressure port A / B on the hydraulic motor.
High pressure pHD is supplied to the actuator piston bottom surface A
B
pReg = 0 bar and to the actuator piston
ring surface A up to a fixed setpoint adjusted with set screw V
g min
for regulation start, e.g. 74 cm
3
.
The axial piston unit is pivoted to V
g min
.
If pHD exceeds the value for regulation start e.g 240 bar on high pressure port A / B, the control valve supplies pReg
(
approx. 1/2 p HD) to the actuator piston bottom surface A
B
. If pReg x A
B
is greater than pHD x A
R
, the actuator
piston travels and pivots the axial piston unit in directionV
g max
and reaches equilibrium as a function of the load.
When 0 bar is supplied to port X, the characteristic line of the HD function is applied.
The HD function can be selectively overridden.
HD override
An override causes 30 bar to be supplied to port X. The axial piston unit pivots to V
g max
, independent of the high
pressure pHD on port A / B. As a result, the hydraulic motor has more sensitive response at maximum torque.
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
24
3.6.2 SD function (negative characteristic line)
The SD regulation is suitable for applications that
require a proportionally regulated displacement flow.
Characteristic curve
When the engine drive shaft is adjusted from V
g max
in direction V
g min
, the axial piston unit pivots to reduced
displacement V
g
as the SD control pressure on X1 increases.
When the control signal on X1 weakens, is missing, or erroneous, the axial piston unit pivots in direction V
g max
.
3.6.3 ZH function
The hydraulically actuated two-point adjustment selectively adjusts the axial piston unit to V
g max
or V
g min,
executed
by switching the control signal on or off on port X1:
- No control signal, axial piston unit at V
g max
- With control signal, axial piston unit at V
g min
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
25
3.6.4 DA function
The DA function regulates the displacement flow of the axial piston unit. The operating pressure is held constant
when the setpoint value has been reached, irrespective of the torque on the drive shaft of the flange-mounted
motor:
- If the output torque increases, the axial piston unit pivots in direction V
g max
to hold the operating
pressure constant.
- If the output torque decreases, the axial piston unit pivots in direction V
g min
to hold the operating
pressure constant.
Options
- Additional internal structural de
sign measures for vibration damping should be implemented after consultation.
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
26
3.6.5 EL function (negative characteristic line)
The EL control is suitable for applic
ations that require a proportionally regulated displacement flow.
Characteristic curve
When the engine drive shaft is adjusted from V
g max
in direction V
g min
, the axial piston unit pivots toward reduced
displacement V
g
as the control signal on E1 rises.
When the control signal on E1 weakens, is missing, or erroneous, the axial piston unit pivots in direction V
g max
.
3.6.6 EL1 function (positive characteristic line)
The EL control is suitable for applic
ations that require a proportionally regulated displacement flow.
Characteristic curve
When the engine drive shaft is adjusted from V
g min
in direction V
g max
, the axial piston unit pivots toward an
increased displacement V
g
as the control signal on E1 rises.
When the control signal on E1 weakens, is missing, or erroneous, the axial piston unit swivels in direction V
g min
.
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
27
3.7 Electrical components
3.7.1 Pressure reduction valve (DRE)
General information
- E1: Connector AMP JUNIOR TIMER
- Nominal voltage U: 24 V
- Current I
max.
: 750 mA
- Supply pressure p
max.
: 50 bar
- Solenoid characteristic: flat around the control position
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
28
3.7.2 Pressure reduction valve (DRE)
General information
- E1: Connector AMP JUNIOR TIMER
- Nominal voltage U: 24 V
- Current I
max.
: 750 mA
- Supply pressure p
max.
: 350 bar
- Solenoid characteristic: flat around the control position
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
29
3.7.3 Sensor system
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13.
15.
DMVA / 1 W 1 A 0
0 Without sensor
D*
W*
* can be combined, separated by dash e.g.: D-W
Motor speed sensor
General information
- E5: Deutsch connector DT04-4P-CE04
- Technical specification
s iaw. BA 374E-64799
Note
The motor speed sensor cannot be retrofitted and needs to be taken into account when the DMVA
is reconfigured.
With motor speed sensor
With angle-of-rotation sensor
3 Actuation and control types
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 10/2015
Version: 1.1
ID No.: 11378482
30
Angle-of-rotation sensor
General information
- Supply voltage: 5 VDC
- Measurement range: -27° to + 27°
- Output signal: 0.5 VDC to 4.5 VDC
- Operating temperature: -40°C to +125°C
Note
The angle sensor cannot be retrofitted and must be taken into account during the new configuration of
the DMVA.
4 Installation conditions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
31
When configuring the axial piston unit, the installation version planned for the device, the system, or the drive motor
in combination with the installation orientation must be coordinated with Liebherr and approved by Liebherr.
Regulation settings or adjustments may be influenced by gravity, the dead-weight, and the housing pressure for
each specific ins
tallation orientation and installation version.
The default values from Liebherr are therefore only rough settings and may have to be readjusted in the device, the
p
lant, or the drive motor.
The leakage-fluid lines must be located below the minimum fluid level
in all installation orientations
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 axial piston units into two installation versions
A and B and into six installation
orientations 1-6.
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
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
32
4.1 Installation variants
Note
When using the DMVA in a closed circuit configuration, the ins
tallation version is irrelevant because of
the missing reservoir.
Below-tank installation “A”: Ax
ial 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.
Abbreviation Designation Comment
4 Swash plate For pacifying the hydraulic fluid in the tank
L1, L2...LX Leak-oil pipe
The shown supply line to the reservoir is only for
illustration. Other connection versions are possible.
Observe line end clearance M!
M
Minimum distance from the end of the line to
the floor of the tank
Select minimum large enough to prevent dirt from
being sucked in!
T Tank -
T1 Leakage oil connection -
4 Installation conditions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
33
4.2 Installation orientations
There are six possible installation orientations for each of the three installation versions.
Note
Please consult Liebherr for installation orientation 3.
ATTENTION
An air buffer in the bearing area or on the radial shaft seal ring, in particular for installation orientation
1 and 3, can result in damage to the hydraulic unit e.g. due to overheating. Before startup, ensure that
the motor housing is completely filled with hy
draulic fluid and vented. Regularly inspect the hydraulic 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 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
34
5.1 NG 108 / EL / EL1 control
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M26x1.5 G Actuation pressure supply ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
- -
5 Dimensions
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
35
5.2 NG 108 / EL-DA control with brake valve
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M10x1
T1 / T2 Leakage oil connection ISO 9974-1, M26x1.5 - -
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
36
5.3 NG 108 / HD control with brake valve
A / B Working port; SAE J518-1“, 6,000 psi M3
Measurement port actuation pressure
ISO 9974-1, M10x1
T1 / T2 Leakage oil connection ISO 9974-1, M26x1.5 X Control pressure port ISO 9974-1, M14x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
37
5.4 NG 108 / SD-DA control
A / B Working port; SAE J518-1“, 6,000 psi M3
Measurement port actuation pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M26x1.5 X Control pressure port ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
38
5.5 NG 108 mounting flange
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
ISO 3019-2
31
5.6 NG 108 shaft end
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
DIN 5480 splined shaft W40x2x18x9g
1
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
39
5.7 NG 165 / EL control
E1
DRE / AMP Junior Timer 2-pin, PWM=
100 Hz, Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M14x1.5
A / B Working port; SAE J518-1 1/4“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M14x1.5
T1 / T2 / T3 Leakage oil connection ISO 9974-1, M26x1.5
G Actuation pressure supply ISO 9974-1, M14x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
40
5.8 NG 165 / EL-DA control
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1 1/4“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M10x1
T1 / T2 Leakage oil connection ISO 9974-1, M26x1.5 - -
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
41
5.9 NG 165 / EL-DA control with brake valve
E1
DRE / AMP Junior Timer 2-pin, PWM=
100 Hz, Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1 1/4“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M12x1.5
T1 / T2 / T3 Leakage oil connection ISO 9974-1, M26x1.5
- -
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
42
5.10 NG 165 / HD control with brake valve
A / B Working port; SAE J518-1 1/4“, 6,000 psi M3
Measurement port actuation pressure
ISO 9974-1, M14x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M26x1.5 X Control pressure port ISO 9974-1, M14x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
43
5.11 NG 165 / SD-DA control
A / B Working port; SAE J518-1 1/4“‚ 6,000 psi M3
Measurement port actuation pressure
ISO 9974-1, M14x1.5
T1 / T2 /
T3
Leakage oil connection ISO 9974-1, M26x1.5 X1 Control pressure port ISO 9974-1, M14x1.5
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
44
5.12 NG 165 mounting flange
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
ISO 3019-2
31
5.13 NG 165 shaft end
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
DIN 5480 splined shaft W45x2x21x9g
1
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
45
5.14 NG 215 / EL control
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M14x1.5
A / B Working port; SAE J518-1 1/4“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M14x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 G Actuation pressure supply ISO 9974-1, M14x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
46
5.15 NG 215 / EL-DA control with brake valve
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1 1/4“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 - -
M1 / M2
Measurement port high pressure
ISO 9974-1, M14x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
47
5.16 NG 215 / EL-DA control with through-drive
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port actuation pressure
ISO 9974-1, M14x1.5
A / B Working port; SAE J518-1 1/4“, 6,000 psi M4
Measurement port control pressure
ISO 9974-1, M14x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 G
Actuation pressure supply
ISO 9974-1, M14x1.5
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
48
5.17 NG 215 mounting flange
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
ISO 3019-2
31
Custom-made product
51
5.18 NG 215 shaft end
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
DIN 5480 splined shaft W50x2x24x9g
1
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
49
5.19 NG 355 / 370 / EL control
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port balanced high pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1 1/2“, 6,000 psi M4
Measurement port actuation pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 M5
Measurement port control pressure
ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
G
Actuation pressure supply
ISO 9974-1, M16x1.5
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
50
5.20 NG 355 / 370 / EL-DA control with through-drive
E1
DRE / AMP Junior Timer 2-pin, PWM= 100 Hz,
Un= 24 V, I
max.
= 750 mA
M3
Measurement port balanced high pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1 1/2“, 6,000 psi M4
Measurement port actuation pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 M5
Measurement port control pressure
ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
G
Actuation pressure supply
ISO 9974-1, M16x1.5
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
51
5.21 NG 355 / 370 / SD control
E1
Speed sensor Deutsch connector
DT04-4P-CE04, cable length: 800 mm
M3
Measurement port balanced high pressure
ISO 9974-1, M12x1.5
A / B Working port; SAE J518-1 1/2“, 6,000 psi M4
Measurement port actuation pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 M5
Measurement port control pressure
ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
52
5.22 NG 355 / 370 / SD-DA control
A / B Working port; SAE J518-1 1/2“, 6,000 psi M3
Measurement port balanced high pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 M4
Measurement port actuation pressure
ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
X Control pressure port ISO 9974-1, M12x1.5
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
53
5.23 NG 355 / 370 / ZH control
A / B Working port; SAE J518-1 1/2“, 6,000 psi M3
Measurement port balanced high pressure
ISO 9974-1, M12x1.5
T1 / T2 Leakage oil connection ISO 9974-1, M33x2 X Control pressure port ISO 9974-1, M12x1.5
M1 / M2
Measurement port high pressure
ISO 9974-1, M12x1.5
- -
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
54
5.24 NG 355 / 370 mounting flange
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
Custom-made product
51
5.25 NG 355 / 370 shaft end
1. 2. 3. / 4. 5. 6. 7.
8.
9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
DIN 5480 splined shaft W60x2x28x9g
1
5 Dimensions
Flange-mounted axial piston motor
DMVA 108 to 370
Date: 09/2015
Version: 1.1
ID No.: 11378482
55
5.26 Through-drive DIN 5480
1. 2. 3. / 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
DMVA / 1 W 1 A 0
5.26.1 NG 215 custom through-drive shaft
K W40x1.25x30x9g
5.26.2 NG 355 / 370 custom through-drive shaft
K W45x1.25x34x9g
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
applications 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 (DMVA 165 EL-DA).
Therefore, 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 indicated values always refer to the
example configuration (DMVA 165 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.
