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HY DRA U LIC M OTOR S
VARIABLE DISPLACEMENT
make it simple
2
Contents
Design, characteristics and advantages . . . . . . . . . . . 3
HYDRAULIC
MOTORS
VARIABLE DISPLACEMENT
Efficiency and operating conditions . . . . . . . . . . . . . . . 4
Order code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dimensions MV series motors . . . . . . . . . . . . . . . . . . . . . 7
Dimensions MVSI series motors . . . . . . . . . . . . . . . . . . . 9
Dimensions MVA series motors. . . . . . . . . . . . . . . . . . . 11
Displacement control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Options | Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installation and start-up recommendations . . . . . . . 15
Also find the fixed displacement LEDUC motors range
in the BENT AXIS HYDRAULIC MOTORS - FIXED
DISPLACEMENT catalogue
downloadable on www.hydroleduc.com
ƒƒ
ƒƒ
ƒƒ
Models from 5 to 180 cc/rev
Available in DIN and SAE versions
In fixed displacement, special drainless motor.
Complete catalogues available at www.hydroleduc.com
Definition & advantages
3
► Main applications
ƒƒ Suitable for use in either open or closed loop circuits
ƒƒ Wheel drives
ƒƒ Track drives
ƒƒ Winches
► Advantages of the LEDUC variable displacement motors
ƒƒ 9 pistons designed for high starting torque and reduced pulsations at low speed
ƒƒ Continuous variation in displacement from Vmax to Vmin (=0)
ƒƒ High operating ratio (5 :1)
ƒƒ Compact size, high weight-power ratio
ƒƒ High speed and high operating pressure
ƒƒ Low noise level
ƒƒ Long service life
ƒƒ 3 choices of displacement control : see page 9 (HPA, H2N, E2N)
► Technical characteristics of LEDUC variable displacement motors
Max. displacement
Min. displacement
Displacement ratio 5
Max. continuous operating pressure
Max. peak pressure
85
115
Vmax
28.185.2
79115.6
Vmin
059.7
040.1
Vmax / 5
17 cc
23.1 cc
Pmax
400 bar
400 bar
Pp
450 bar
450 bar
Max. speed at max. displacement
Nmax at Vmax
3900 rpm
3550 rpm
Max. speed at min. displacement
Nmax at Vmin
6800 rpm
5600 rpm
Qmax
331 l/min
408 l/min
Max. flow absorbed
Max. output power
Pmax
220 kW
271 kW
Max. output torque at Pmax and Vmax
Cmax
54 daN.m
73 daN.m
Currently two models of motor are offered : 85cc/rev and 115 cc/rev. Models to extend the range are currently being developped.
► Advantages of LEDUC variable motors
High quality know-how and materials. The design choices below ensure the reliability and long service life of LEDUC motors.
High performance bearings
for long service life.
No gears between swashplate and
rotating barrel, yields reduced noise levels.
By design, the barrel is centered, which avoids
radial stress and thus improves service life.
Sealing designed specifically
to withstand back presssure
from the motor return drain circuit.
9-piston design, ensuring excellent operating
regularity and constant torque.
Injection of high pressure on piston heads
reduces friction, heating and wear.
Mechanical liaison between piston head
and motor shaft guarantees there is no separation
and thus ensures long service life.
Maximum and minimum displacement setting via screws.
Displacement controlled by setting piston.
Different controls are offered: see page 13.
Efficiency and operating conditions
4
► Efficiency of the MV, MVA, and MVSI motors
Efficiency at 1/3 displacement
N = 1000 rpm ISO46 fluid at 25°C (77°F)
Efficiency (%)
Efficiency (%)
Efficiency at maximum displacement
N = 1000 rpm ISO46 fluid at 25°C (77°F)
100
90
100
90
80
80
70
70
60
60
50
0
0
100
(1450)
200
(2900)
300
(4350)
Volumetric efficiency (%)
Global efficiency (%)
50
400
(5800)
Pressure in bar (psi)
0
0
100
(1450)
200
(2900)
Volumetric efficiency (%)
Global efficiency (%)
300
(4350)
400
(5800)
Pressure in bar (psi)
These graphs are given as an indication only; for further information, please contact our Technical Service.
►Preparation of the motor
Bleeding of control device is done automatically
during initial commissioning.
►The fluid
LEDUC motors are designed for use with
mineral based hydraulic fluid. Using other fluids
is possible but may require a modified motor.
Please contact us with details of fluid.
Recommended viscosity:
ƒƒ Ideally: between 15 and 400 cSt,
ƒƒ Maximum range: between 5 and 1600 cSt.
►Filtration of the hydraulic fluid
The service life of the motors depends greatly on the quality and the
cleanliness of the hydraulic fluid.
We recommend minimum cleanliness as follows:
ƒƒ
ƒƒ
ƒƒ
For fluids at very high temperatures 194 to 239 °F (90 to 115 °C), we
recommend a minimum cleanliness class of 19/17/14 according to
ISO 4406.
►Rotating speeds
Minimum rotating speed to obtain continuous rotation is 200 rpm
(however, in certain conditions, the motor can run at speeds as low as
50 rpm). Maximum rotating speed is given for each model of motor.
►Installation positions
LEDUC motors are made to operate in all positions
(see details on page 15).
►Operating temperatures
ƒƒ As standard, LEDUC motors are fitted with FKM seals (Viton ®).
Operating temperatures: from -13 to 239 °F (-25 à 115 °C).
ƒƒ
As an option, HYDRO LEDUC proposes NBR seals, for
operating temperatures from -40 to 176°F (-40 to 80°C).
NAS 1638 class 9,
SAE class 6,
ISO/DIS 4406 class 20/18/15.
IMPORTANT NOTE:
Before start up, ensure the motor is filled with hydraulic fluid: See section on installation and start-up, page 15.
Efficiency and operating conditions
►Direction of rotation
The motors rotate clockwise or counter-clockwise depending on the direction of hydraulic flow entering the motor.
Counter-clockwise
rotation
(CCW)
Clockwise
rotation
(CW)
T1
A
B
T1
A
B


T2
T2
►Drain pressure
It is essential to drain the motor, T1 and T2, to avoid excessive
pressures on the shaft seal. Maximum acceptable internal pressure
depends on motor rotation speed.
However, following these guidelines will avoid problems during
operation:
ƒƒ Maximum internal pressure (Int P) regardless of rotating speed
(continuous): 4 bar.
ƒƒ Maximum pressure regardless of rotating speed: 5.5 bar.
ƒƒ The maximum pressure in the motor housing must be greater
than the external pressure (ext P).
►Acceptable forces applied to motor shaft
Variable motors
MV | MVSI | MVA
85
115
Fr
daN
1300
1500
Fa
N/bar
80
60
Fr
Fa
5
Order code
6
MV
...
A
...
...
M2
...
...
...
...
F
01
02
03
04
05
06
07
08
09
10
11
To obtain the code for your motor, complete the different
parameters 01 to 11 in the table on the left according to the
options you require (see table below).
Motor
01
MV
MVSI
MVA
MV
MVSI
MVA
A
B
C
Displacement
85
02
115
85
115
85
115
SAE C 4 bolts
SAE D 4 bolts
Mounting flange
03
ISO 3019-2, 4 bolts
ISO 3019-2, 2 bolts
Shaft
DIN 5480 splined
W40
W40
W40
W40
–
–
W1
SAE J744 splined
1½" 17T 12/24 DP
1¾" 13T 8/16 DP
–
–
1½" 17T 12/24 DP
1¾" 13T 8/16 DP
S1
●
●
●
●
●
●
M0
●
●
●
●
●
●
N0
(–)
(–)
(–)
(–)
(–)
(–)
N1
2
2
2
2
2
2
Automatic
high pressure
●
●
●
●
●
●
HPA
Hydraulic
2 speeds
●
●
●
●
●
●
H2N
Electric
2 speeds
●
●
●
●
●
●
E2N
04
Inlet ports
Rear
05
Flange
Side
Drain
06
M2
M2
Regulation
07
Suitable for use of speed sensor
08
Yes
●
●
●
●
●
●
1
No
●
●
●
●
●
●
0
Yes
●
●
●
●
●
●
1
No
●
●
●
●
●
●
0
Without
●
●
●
●
●
●
SV
With flushing valve
(–)
(–)
(–)
(–)
(–)
(–)
VB
FKM
●
●
●
●
●
●
F
Speed sensor
09
Flushing valve
10
Seal
11
Legend:
● Exisiting model
– Not yet existing
(–) Possible on request.
Requires a N1 flange.
U2
MV 85
P
+1
32 0
165
127.3
86.8
122.9
T1 : M18 x 150
31.8
Ø 13.50
114
15°
127.3
170.80
Ø 180
0
Ø 140 - 0.02
Ø 116
10
141.6
31
266.5
T2 : M18 x 1.5
98
196.8
04
shaft DIN 5480
W1 Splined
W40 x 2 x 30 x 18 x 9g
+1
77 -0.5
P
S1
Splined shaft SAE J744
17T 12/24DP 1½"
2.44
7/16 14UNC-2B
►Shaft - code
M16 x 200
36
P
1.73 (44)
0
0
0
2.13 -0.02 (54 -0.5)
45 -0.5
flanges
M0 Rear
SAE 1" 6000 psi
+1
(62 -0.5 )
1.10 (28)
37
►Inlet ports - code
+0.04
-0.02
05
N0
75
M12 depth 17 mm
Ø 24
57.2
57.2
27.8
Side flanges
SAE 1" 6000 psi
M12 depth 17 mm
Dimensions (in mm) are given only as an indication.
27.8
Ø 24
7
M V 11 5
P
159.6
39
Ø 200
190
34
15°
0
Ø 160 -0.025
145
95
111.4
10
190
141.4
285.5
+1
40 -0
141.4
8
119.5
Ø 17.50
T2 : M18 x 1.5
102.80
212.9
►Shaft - code
04
shaft DIN 5480
W1 Splined
W40 x 2 x 30 x 18 x 9g
M12 x 175
+1
85 -0.5
S1
P
Splined shaft SAE J744
13T 8/16DP 1¾"
+0.04
P
2.95 -0.02
+1
(75 -0.50)
1.42 (36)
5/8" 11UNC-2B
28
2.05 (52)
37
2.63 (66.70)
0
45 -0.5
►Inlet ports - code
flanges
M0 Rear
SAE 1" 6000 psi
05
N0
90
Side flanges
SAE 1"6000 psi
27.8
27.8
M12 depth 17 mm
M12 depth 17 mm
Dimensions (in mm) are given only as an indication.
Ø 24
57.2
57.2
Ø 24
MVSI 85
+0.2
110.5 -0.4
P
260
224
187.4
86.50
T1 : M18 x 1.5
99
31.8
15°
+0
Ø 190 -0.03
142
116
81.50
122.9
15
106
Ø 21
109.5
19.50
T2 : M18 x 1.5
R99
153
118.3
►Shaft - code
04
shaft DIN 5480
W1 Splined
W40 x 2 x 30 x 18 x 9g
155.5
+0.2
-0.9
P
M16 x 200
36
37
0
45 -0.5
►Inlet ports - code 05
flanges
M0 Rear
SAE 1" 6000 psi
N0
75
M12 depth 17 mm
Ø 24
57.2
57.2
27.8
Side flanges
SAE 1" 6000 psi
M12 depth 17 mm
Dimensions (in mm) are given only as an indication.
27.8
Ø 24
9
M V S I 11 5
P
+0.2
122.8 -0.4
15
202.7
T1 : M18 x 1.5
34
15°
0
Ø 200 -0.029
Ø 160
Ø 138
84.5
111.4
96
286
250
103
10
114
Ø 22
119
23
T2 : M18 x 1.5
R105
164
130.1
►Shaft - code
04
shaft DIN 5480
W1 Splined
W40 x 2 x 30 x 18 x 9g
+0.2
167.8 -0.9
P
M12 x 175
28
37
0
45 -0.5
►Inlet ports - code
flanges
M0 Rear
SAE 1" 6000 psi
05
N0
90
Side flanges
SAE 1" 6000 psi
27.8
27.8
M12 depth 17 mm
M12 depth 17 mm
Dimensions (in mm) are given only as an indication.
Ø 24
57.2
57.2
Ø 24
M VA 8 5 ( S A E v e r s i o n )
4.84 (122.90)
4.19 (R106.5)
0.69 (17.5)
6.72 (170.80)
1.25
(31.8)
15°
0
7.13 (181)
4.49 (114)
86.8
(3.42)
11.41 (289.9)
T1 : 1"1/16 12 UNF-2B
6.52 (165.6)
(Ø 127-0.025 )
0.00
Ø 5.00 -0.00
0.5
(12.70)
0.3
(7.90)
4.80 (122)
T2 : 1"1/16 12UNF-2B
8.69 (220.8)
►Shaft - code
Splined shaft SAE J744
17T 12/24DP 1½"
2.44
7/16 14UNC-2B
S1
04
+0.04
-0.02
+1
(62 -0.5 )
P
1.10 (28)
1.73 (44)
0
0
2.13 -0.02 (54 -0.5)
►Inlet ports - code 05
N0
2.95
(75)
7/16 14UNC-2B
1.09
(27.8)
2.25
(57.2)
Ø 0.94
(24)
7/16 14UNC-2B
Dimensions in inches (mm) are given only as an indication.
Side flanges
SAE 1" 6000 psi
2.25
(57.2)
flanges
M0 Rear
SAE 1" 6000 psi
1.09
(27.8)
Ø 0.94
(24)
11
M VA 11 5 ( S A E v e r s i o n )
0.50
(12.70)
7.90
(0.31)
12.36 (313.9)
7.42 (188.4)
Ø 9.00
(228.54)
6.36 (161.60)
6.36 (161.60)
8.11 (206)
15°
0
1.34
(34) 3.72 (94.5)
4.70 (119.5)
4.39 (111.4)
T1 : 1"1/16 12 UNF-2B
(Ø 152.40 -0.025)
6.00 0.0000
0.0010
5.17 (131.40)
T2 : 1"1/16 12UNF-2B
9.50 (241.3)
►Shaft - code
S1
04
Splined shaft SAE J744
13T 8/16DP 1¾"
+0.04
P
2.95 -0.02
+1
(75 -0.50)
1.42 (36)
5/8" 11UNC-2B
2.05 (52)
2.63 (66.70)
►Inlet ports - code
N0
3.54
(90)
1.09
(27.8)
7/16 14UNC-2B
depth 22 mm
Dimensions in inches (mm) are given only as an indication.
Side flanges
SAE 1" 6000 psi
1.09
(27.8)
7/16 14UNC-2B
Ø 0.94
(24)
Ø 0.94
(24)
2.25
(57.2)
flanges
M0 Rear
SAE 1" 6000 psi
05
2.25
(57.2)
12
Ø 0.81
(20.60)
Displacement control
►Displacement settings - code
Automatic displacement control,
high pressure
HPA
Vmax
V1
MA
Vmin
V2
Mp
X
Displacement
A
Vmin
Maximum setting
G
80 90
350 360 Regulating pressure Pr
(bar)
The automatic displacement control, high
pressure, automatically adjusts displacement
as a function of the set pressure level.
This can be set between 80 and 350 bar.
Once set pressure has been reached, the
motor starts changing displacement from
Vmin to Vmax. Pressure remains stable,
torque increases and speed decreases until
Vmax is reached.
Once Vmax has been reached, motor
pressure can exceed set pressure if required.
.
MA
V2
Mp
MB
P
B
A
Displacement
Displacement
Vmax
Vmax
Minimum setting
Vmax
Minimum setting
V1
X
P
B
V2
Mp
MB
MA
Vmin
Vmax
Vmin
V1
Two speed electric adjustment of
displacement:
E2N
G
B
Maximum setting
A
Two speed hydraulic adjustment of
displacement:
H2N
Vmax
MB
P
07
Vmin
Vmin
5
25
100
Pilot pressure X
(bar)
Setting Vmin or Vmax displacement is done by
applying an external pilot pressure, or not.
Pilot pressure can be set by a screw from
5 to 25 bar.
Once pilot pressure has been reached, the
motor starts changing displacement from
Vmin to Vmax (standard configuration).
From Vmax to Vmin on request.
Important note: the pilot pressure line X must
be drained when it is not under pressure
(to ensure evacuation of leakage flow).
24
Coil supply voltage
(Volt)
Setting Vmin or Vmax displacement is done by
applying an external electrical current via a
solenoid, or not.
Standard voltage of the coil is 24V
(12V on request).
When the coil is activated, the motor starts
changing displacement from Vmin to Vmax
(standard configuration).
From Vmax to Vmin on request.
.
13
Options | Accessories
14
S P E E D S E N S O R & I N D I C AT O R O F D I R E C T I O N O F R O TAT I O N
LEDUC CODE: 093327
Codes 08
and 09
MV, MVA, MVSI series motors can be fitted with an induction type speed sensor, to measure rotating speed and also direction of rotation.
This accessory may only be used on motors which are suitably adapted to take it (see the order code system).
0.41 (10.5)
0
(15.60
)
Ø 0.26 (6.50)
0
(20.79
)
Ø 0.55 (14)
0(
1.3
33
)
4.53( 115)
►Technical data for the sensor
Supply voltage
Current consumption
Output frequency
Protection type
Operating temperature
Weight
Cable length
5…32 V DC
maximum 6 mA without load
0 Hz…20 kHz
IP 69 k
– 104°F…+ 257°F (– 40°C…+ 125°C)
around 65 g
50 cm
FLUSHING VALVE | LEDUC CODE : VBS 091180
Code
10
Used to create flow to cool the motor. This valve is essential for all intensive uses of motors and contributes to long service life.
The valve takes some hydraulic fluid from the return connection port (low pressure) and reinjects it into the motor housing.
This is then evacuated via the motor drain line.
Flushing valves are only available for use with motors with side ports (N1).
►S c h e m a t i c d r a w i n g o f t h e f l u s h i n g v a l v e
A
B
Dimensions in inches (mm) are given only as an indication.
Installation & start up
►Maximizing service life of bearings
In cases where there is a radial force on motor shaft, keeping the direction of that force within the shaded areas shown below will improve
service life of the motor.
Gear hub
Motor in rotation
CCW
pressure in A
Pulley hub
Motor in rotation
CW
pressure in B
Motor in rotation
CW
pressure in B
70°
70°
Fr
Motor in rotation
CCW
pressure in A
45°
Fr
45°
Motor capable
of rotation
CCW and CW
Fr
Fr
Fr
B
A
B
A
B
A
B
A
B
A
►Mounting position of motors
LEDUC motors can be used in only mounting position. In ″shaft upwards″ position, make sure that the motor housing is completely filled with fluid.
In installations where the position of the motor (H) is above the tank for the drain return, be sure the drain line is always submerged in fluid.
If this is not the case, it is necessary to add a check valve on the drain line as shown the figure on right.
H
Ensure a ∆P
of (0.3 to 0.5 bar)
15
A passion for hydraulics
HYDRO
HYDRO
LEDUC
LEDUC
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& Usine
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LEDUCN.A.
N.A.Inc.
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make it simple
HYDRO LEDUC
SAS au capital de 4 065 000 €
EORI FR31902742100019
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RC Nancy B 319 027 421
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EN_20160406_VARIABLE MOTORS