Axial Piston Motors

Series 20
Axial Piston Motors

Technical
Information
Series20_Axial Piston Motors_TI_012002.indd

1
11.2.2002, 12:23
Series 20 Axial Piston Motors

Technical Information
General Description
INTRODUCTION
Sauer-Danfoss a world leader in hydraulic power systems has developed a family of axial
piston motors.
DESCRIPTION
Sauer-Danfoss axial pistons fixed displacement motors are of swash plate design with
preset displacement suitable for hydrostatic transmissions with closed loop circuit.
The output speed is proportional to the motors input flow.
The output torque is proportional to the differential pressure applied to the main
pressure ports.
The direction of motor (output) shaft rotation depends on flow input to the main
pressure ports.
Sauer-Danfoss axial piston fixed displacement motors are well engineered and easy to
handle.
The full-length shaft with a highly efficient tapered roller bearing arrangement offers a
high loading capacity for external radial forces.
High case pressures can be achieved without leakage even at the lowest temperatures
by using suitable shaft seals.
Sauer-Danfoss axial piston units are designed for easy servicing. Complete dismantling
and reassembly can be carried out with standard hand tools, and all components or
sub-assemblies are replaceable.
Axial piston fixed displacement motors of the Sauer-Danfoss pattern are made by
licensed producers worldwide, providing consistent service and fully inter-changeable
parts.
TYPICAL MARKETS
Industrial
Mining
Transit Mixer
Utility Vehicles
1999 -2001, Sauer-Danfoss

Sauer-Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Sauer -Danfoss reserves the
right to alter its products without prior notice. This also applies to products already ordered provided that such alterations can be made without
subsequent changes being necessary in specifications already agreed. All trademarks in this material are properties of the respective companies.
Sauer-Danfoss and the Sauer-Danfoss logotype are trademarks of the Sauer-Danfoss Group. All rights reserved.
Front page: F000 234, F000 249, F000 150, F000 248
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Contents
CONTENTS
General description ...................................................................................................................................................... 2

Introduction ................................................................................................................................................................. 2
Description ................................................................................................................................................................... 2
Typical Markets ........................................................................................................................................................... 2
Sectional view ................................................................................................................................................................. 4
Axial piston fixed displacement motor .............................................................................................................. 4
System circuit description ......................................................................................................................................... 5
Pump and motor circuit description ................................................................................................................... 5
Motor circuit schematic ........................................................................................................................................... 5
Technical specification ................................................................................................................................................ 6
Technical parameters ................................................................................................................................................ 6
Design .............................................................................................................................................................................................. 6
Type of mounting ........................................................................................................................................................................ 6
Pipe connections ......................................................................................................................................................................... 6
Direction of rotation ................................................................................................................................................................... 6
Installation position .................................................................................................................................................................... 6
External drain fluid loss ............................................................................................................................................................. 6
Hydraulic parameters ............................................................................................................................................... 7

System pressure range, input p1 ............................................................................................................................................. 7
System pressure range, output p2 .......................................................................................................................................... 7
Case pressure ................................................................................................................................................................................ 7
Hydraulic fluid ............................................................................................................................................................................... 7
Hydraulic fluid temperature range ........................................................................................................................................ 7
Viscosity range .............................................................................................................................................................................. 7
Filtration .......................................................................................................................................................................................... 7
Shaft load ....................................................................................................................................................................................... 7
Technical data ............................................................................................................................................................................... 8
Determination of nominal motor size .................................................................................................................................. 8
Dimensions Frame size 033, 052, 070, 089 and 119 cm3 ........................................................................ 10
Outline drawing, configuration MS ................................................................................................................... 10
Outline drawing, basic model ............................................................................................................................. 14
Outline drawing, motor configuration AM 01000 ....................................................................................... 14
Outline drawing, motor configuration MR ..................................................................................................... 15
Circuit diagrams ....................................................................................................................................................... 16
Dimensions Frame size 166, 227 and 334 cm3 ............................................................................................ 18
Outline drawing, configuration MS ................................................................................................................... 18
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Sectional View
AXIAL PISTON FIXED DISPLACEMENT MOTOR
P005 118E
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System Circuit Description
PUMP AND MOTOR CIRCUIT DESCRIPTION
HEAT EXCHANGER BYPASS VALVE
RESERVOIR
VACUUM GAUGE
CONTROL
HANDLE
HEAT EXCHANGER
SERVO CONTROL CYLINDER
REVERSIBLE VARIABLE
DISPLACEMENT PUMP
SERVO
PRESSURE
RELIEF VALVES
PUMP SWASHPLATE
FIXED
DISPLACEMENT MOTOR
PURGE RELIEF VALVE
CHARGE PRESSURE
RELIEF VALVE
LOOP FLUSHING VALVE
INPUT SHAFT
MOTOR SWASHPLATE
SERVO CONTROL CYLINDER
WORKING LOOP (HIGH PRESSURE)
OUTPUT SHAFT
WORKING LOOP (LOW PRESSURE)
CONTROL FLUID
SUCTION LINE
CASE DRAIN FLUID

P000 027E
Above figure shows schematically the function of a hydrostatic transmission using an

axial piston variable displacement pump and a fixed displacement motor.
MOTOR CIRCUIT
SCHEMATIC
MA
L2
A
4
2
Ports:
A, B =
B
L1
M
Designation:
1
=
Fixed displacement motor
2
=
Purge relief valve
3
=
Shuttle valve
4
=
High pressure relief valve
MB
P000 034
L1, L2
MA
MB
M
=
=
=
=
Main pressure ports

(working loop)
Drain ports
Gauge port for port A
Gauge port for port B
Gauge port - charge pressure
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Technical Specification
TECHNICAL PARAMETERS
Design
Axial piston motor with fixed displacement and swash plate design.
Type of mounting
SAE four bolt flanges.
Pipe connections
Main pressure ports: SAE split flange
Remaining ports:
SAE O-ring boss
Direction of rotation and flow
Clockwise or counterclockwise (viewing from the output shaft).
Direction of rotation
Port A
Port B
Clockwise (R)
Counterclockwise (L)
Output
Input
Input
Output
Installation position
Optional; motor housing must be always filled with hydraulic fluid.
External drain fluid loss
28
20
2
1
0
External drain fluid loss (l/min)
(US gal/min)
227
Typical values for 350 bar [5076 psi]

and 18 swashplate angle
24
334
166
16
119
12
089
070
4
0
052
033
1000
2000
3000
4000
Driveshaft speed n (min-1) (rpm)

P005 105E
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HYDRAULIC
PARAMETERS
System pressure range, input p1

Pressure on port A or B:
Max. operating pressure
Max. high pressure setting
1
p = 420 bar [6092 psi]

p = 460 bar1 [6672 psi]
only with POR-valve
System pressure range, output p2

Normal setting for configuration MS and MR: 11.0 - 12.5 bar [160 - 181 psi] above case
pressure.
Minimum: 8 bar, intermittent only
Case pressure
Max. rated pressure = 2.5 bar [36.3 psi]
Intermittent
= 5.0 bar [72.5 psi]
Hydraulic fluid
Refer to Sauer-Danfoss publication Hydraulic Fluids and Lubricants and Experience with Bio
Fluids for biodegradable hydraulic fluids.
Hydraulic fluid temperature range
min = - 40 C [- 40 F]
max = 95 C [203 F]
Viscosity range
min = 7 mm2/s [49 SUS*]
max = 1000 mm2/s [4630 SUS*] (intermittent cold start)
Recommended viscosity range: 12 - 60 mm2/s [66 - 278 SUS*]
*SUS (Saybolt Universal Second)
Filtration
Required cleanliness level: ISO 4406-1999 Code 22/18/13 or better. Refer to Sauer-Danfoss
publication Hydraulic Fluids and Lubricants and Design Guideline for Hydraulic Fluid
Cleanliness.
Shaft load
The pump will accept radial and axial loads on its shaft, the maximum capacity being
determined by direction and point of application of the load. Please contact your
Sauer-Danfoss representative.
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HYDRAULIC
PARAMETERS
(continued)
Technical data
Dimension
Frame size
033
052
070
089
119
166
227
cm3
33.3
51.6
69.8
89.0 118.7 165.8
227.3
Max. displacement
[in3]
[2.03] [3.15] [4.26] [5.43] [7.24] [10.12] [13.87]
1
Rated speed
min-1 (rpm)
3800
3500
3200 2900 2700
2400
2100
Nm/bar
0.53
0.82
1.11
1.42
1.89
2.64
3.62
Theoretical torque
[in lb/1000 psi] [323] [500] [677] [867] [1153] [1611] [2209]
Mass moment of inertia kg m2 10 -3
4.34
8.14
12.34 17.77 29.11 50.19
86.80
of rotating group
[lbfft2 10 -3] [103.0] [193.2] [292.8] [421.7] [690.8] [1191.0] [2059.8]
1
334
333.7
[20.36]
1900
5.31
[3240]
161.40
[3830.0]
for higher speeds contact your Sauer-Danfoss representative
Determination of nominal motor size

Unit:
Metric System:
Inch System
Input flow
Vg n
Qe =
1000 v
l/min
Vg n
Qe =
231 v
[gpm]
Output torque
Vg p m
Me =
20
Nm
Vg p m
Me =
2
[lbfin]
Output power
Qe p t
Pe =
600
kW
Vg n p t
Pe =
[hp]
396 000
Speed
Qe 1000 v
n =
Vg
min-1
Qe 231 v
n =
(rpm)
Vg
Efficiency characteristic curves available on request.

Vg = Moror displacement per revolution
n = Motor speed
p = Hydraulic pressure differential
p = pHD - pND
v = Moror volumetric efficiency
m = Moror mechanical efficiency
t = Moror total efficiency
pHD = High pressure
pND = Low pressure
cm3
min-1
bar
[in3]
(rpm)
[psid]
bar
bar
[psid]
[psid]
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Notes
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Dimensions Frame Size 033, 052, 070, 089 and 119 cm3
OUTLINE DRAWING,
CONFIGURATION MS
Port "L1": Case drain port

(use highest port as outlet)
E
J
K
Coupling may not protrude

beyond L mm maximum
lenght of full spline
Approx. centre
of gravity
Purge relief valve
52.4
Shuttle valve
(both sides)
N -0.05
26.2
M
Shaft spline data: *
Pitch
=S
Pressure angle = 30
Number of teeth = T
Pitch
=U
Port "A"
Port "L2":
Case drain port
12.450.24
D
C
B
A
P000 567E
View Y
Flange design
2/070
Gauge port "MB"
Gauge port "MA"
Gauge port "M"

charge pressure
Port "B"
Port "A"
High pressure relief

valve for port "A"

valve for port "B"
V
Port "A"
V
Port "B"
219
P005 101E
* Shaft spline data: spline shaft with involute spline, according to SAE handbook, 1963,
class 1, fillet root side fit.
Frame size
Port A and B
033
SAE flange, size 1

SAE split flange boss
5000 psi
4 threads
3/8-16 UNC-2B
18 deep
052
070
089
119
10
Port L1 and L2
7/8-14 UNF-2B
SAE straight thread
O-ring boss
Port MA and MB
7/16-20 UNF-2B
SAE straight thread
O-ring boss
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Port M
11.2.2002, 12:24

OUTLINE DRAWING,
CONFIGURATION MS
(continued)
View X (for SMF 2/033 - 2/052 only)
Rotation
L
156
124
45
16
Approx. centre
of gravity
15
+ 0.8
0.3
146
190
P005 102E
View X (for SMF 2/070 only)
45
Rotation
L
193.5
168
142.8
1
62
Approx. centre
of gravity
+ 0.8
15 0.3
168
P005 119E
11
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OUTLINE DRAWING,
CONFIGURATION MS
(continued)
45
Rotation
L
156
168
16
2
Approx. centre
of gravity
15
+ 0,8
0,3
168
P005 120
170
203
45
Rotation
2
29
Approx. centre
of gravity
21.3
+ 0.8
0.3
213
P005 103E
12
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OUTLINE DRAWING, CONFIGURATION MS (continued)
Dimensions
Frame
size
033
052
070
089
119
Frame
size
033
052
070
089
119
mm
mm
A
B
[in]
[in]
340
252
[13.386]
[9.921]
358
270
[14.094] [10.630]
378
290
[14.882] [11.417]
395
307
[15.551] [12.087]
442
354
[17.402] [13.937]
mm
mm
N
O
[in]
[in]
127
84
[5.000]
[3.307]
127
84
[5.000]
[3.307]
127
84
[5.000]
[3.307]
127
98
[5.000]
[3.858]
152.4
98
[6.000]
[3.858]
mm
mm
mm
C
D
E
[in]
[in]
[in]
214
156
89
[8.425]
[6.142]
[3.504]
235
160
96
[9.252]
[6.299]
[3.780]
255
165
108
[10.039]
[6.496]
[4.252]
273
170
118
[10.748]
[6.693]
[4.646]
295
175
125
[11.614]
[6.890]
[4.921]
mm
mm
mm
P
R
S
[in]
[in]
[in]
34.50 -0.17
8.5
33.338
[1.358 -0.0067] [0.335]
[1.313]
34.50 -0.17
8.5
33.338
[1.358 -0.0067] [0.335]
[1.313]
34.50 -0.17
8.5
33.338
[1.358 -0.0067] [0.335]
[1.313]
37.68 -0.17
8.5
36.513
[1.483 -0.0067] [0.335]
[1.438]
44.03 -0.17
11.8
42.863
[1.733 -0.0067] [0.465]
[1.688]
mm
[in]
70.6
[2.780]
76
[2.992]
86.5
[3.406]
96.0
[3.780]
98.2
[3.866]
mm
T
[in]
21
[0.827]
21
[0.827]
21
[0.827]
23
[0.906]
27
[1.063]
F
mm
[in]
82
[3.228]
88
[3.465]
98
[3.858]
107
[4.213]
109
[4.291]
mm
U
[in]
G
16/32
16/32
16/32
16/32
16/32
mm
[in]
140
[5.512]
154
[6.063]
161
[6.339]
181
[7.126]
200
[7.874]
mm
V
[in]
81
[3.189]
85.8
[3.378]
85.8
[3.378]
95.2
[3.748]
106.5
[4.193]
mm
[in]
16
[0.630]
16
[0.630]
16
[0.630]
18
[0.709]
25
[0.984]
mm
W
[in]
92
[3.622]
96
[3.780]
101
[3.976]
114
[4.488]
J
mm
mm
L
[in]
[in]
56
48
[2.205]
[1.890]
56
48
[2.205]
[1.890]
56
48
[2.205]
[1.890]
56
48
[2.205]
[1.890]
75
67
[2.953]
[2.638]
Diameter for mm
shaft coupling [in]
31.75 +0.062
[1.250 +0.0024]
31.75 +0.062
[1.250 +0.0024]
31.75 +0.062
[1.250 +0.0024]
34.95 +0.062
[1.376 +0.0024]
41.28 +0.062
[1.625 +0.0024]
K
13
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12-13
mm
[in]
28.4
[1.118]
28.4
[1.118]
28.4
[1.118]
28.4
[1.118]
38.4
[1.512]
kg
Weight
[lb]
30
[66]
35
[77]
40
[88]
47
[104]
70
[154]
M
11.2.2002, 12:24

OUTLINE DRAWING,
BASIC MODEL
A
D
Return from purge relief
valve to motor case R3/4
P000 568E
Dimensions
Frame size
033
052
070
089
119
A mm [in]
252 [9.921]
270 [10.630]
290 [11.417]
307 [12.087]
354 [13.937]
B mm [in]
25 [0.984]
32 [1.260]
30 [1.181]
44 [1.732]
37 [1.457]
C mm [in]
11 [0.433]
9 [0.354]
12 [0.472]
6 [0.236]
10 [0.394]
D mm [in]
2 [0.079]
Weight kg [lb]
24 [53]
29 [64]
34 [75]
41 [90]
64 [141]
For further dimensions see previous pages.

A
OUTLINE DRAWING,
MOTOR CONFIGURATION
AM 01000
1.5
B
12
110
25
Return from purge

relief valve to motor
case 7/8 - 14 UNF - 2B
100
P000 569E
Dimensions
Frame size
033
052
070
089
119
1
A mm [in]
277 [10.905]
295 [11.614]
315 [12.402]
332 [13.071]
379 [14.921]
Weight 1 kg [lb]
26 [57]
31 [68]
36 [79]
43 [95]
66 [146]
Light weight and short options available on request
14
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OUTLINE DRAWING, MOTOR CONFIGURATION MR
B
Purge relief valve
Shuttle valve
(both sides)
Gauge port "MB"
Gauge port "MA"
Port "B"

valve for port "A"

valve for port "B"
Bypass - handle
Partial View A-A
Bypass valve
opened
9.4 0.25
Port "A"
12
Gauge port "M"

charge pressure
90
19.05
3 x 6.5
Bypass valve
closed
25.4
41.28
50.8
58.55
90
P005 104E
Dimensions
Frame size
033
052
070
089
119
mm
A
[in]
388
[15.276]
406
[15.984]
426
[16.772]
443
[17.441]
490
[19.291]
mm
B
[in]
353
[13.898]
371
[14.606]
391
[15.394]
408
[16.063]
455
[17.913]
Weight kg
[lb]
32
[71]
37
[82]
42
[93]
49
[108]
72
[159]
Port MA and MB
Port M
7/16-20 UNF-2B
SAE straight thread O-ring boss
15
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CIRCUIT DIADRAMS
Configuration MR
MA
L2
4
5
2
3
B
L1
M
MB
P000 035
Basic model and motor configuration AM 01000

L2
A
Return from purge relief
valve to motor case
Designation:
1 = Fixed displacement motor
2 = Purge relief valve
3 = Shuttle valve
4 = High pressure relief valve
5 = Bypass valve
Ports:
A,B =
B
L1
P000 038E
16
L1, L2
MA
MB
M
=
=
=
=
Main pressure ports

(working loop)
Drain ports
Gauge port for port A
Gauge port for port B
Gauge port - charge pressure
DKMH.PN.340.C1.02 520L0516

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Notes
17
DKMH.PN.340.C1.02 520L0516

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11.2.2002, 12:24

Dimensions Frame Size 166, 227 and 334 cm3
OUTLINE DRAWING, CONFIGURATION MS
E
Port "L1": Case drain port

(use highest port as outlet)
Purge relief valve
Approx. centre
of gravity
77
Coupling may not protrude

beyond L mm maximum
lenght of full spline
Y
79.4
Shuttle valve
(both sides)
N -0.05
36.5
M
Port "A"
12.450.24
Port "L2":
Case drain port
D
C
Shaft spline data: *
Pitch
Pressure angle
Number of teeth
Pitch
=S
= 30
=T
=U
B
A
P005 100E-1
View Y
View X
CC
Gauge port "MA"
Gauge port "MB"
Gauge port "M"

charge pressure
Port "A"
45
Rotation
R
Y
Port "B"
AA

valve for port "A"

valve for port "B"
V
Port "A"
V
Port "B"
Approx. centre
of gravity
BB
P005 100E-2
* Shaft spline data: spline shaft with involute spline, according to SAE handbook, 1963,
class 1, fillet root side fit.
18
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11.2.2002, 12:24

Dimensions Frame Size 166, 227 and 334 cm3
OUTLINE DRAWING, CONFIGURATION MS (continued)
Dimensions
Frame size
166
227
334
Frame size
166
227
334
Frame size
166
227
334
mm
A
[in]
467
[18.740]
498
[19.606]
537
[21.142]
mm
M
[in]
38.4
[1.512]
38.4
[1.512]
46.2
[1.819]
mm
W
[in]
148
[5.827]
156
[6.142]
176
[6.929]
mm
B
[in]
388
[15.276]
410
[16.142]
449
[17.677]
mm
N
[in]
165.1
[6.500]
165.1
[6.500]
177.8
[7.000]
mm
X
[in]
145
[5.709]
160
[6.299]
174
[6.850]
mm
C
[in]
331
[13.031]
346
[13.622]
389
[15.315]
mm
O
[in]
98
[3.858]
110
[4.331]
114
[4.488]
mm
Y
[in]
254
[10.000]
265
[10.433]
298
[11.732]
mm
D
[in]
219
[8.622]
228.5
[8.996]
278
[10.945]
mm
P
[in]
44.03 - 0.17
[1.733 - 0.0067]
44.03 - 0.17
[1.733 - 0.0067]
64.66 - 0.16
[2.546 - 0.0063]
mm
Z
[in]
285
[11.220]
265
[10.433]
298
[11.732]
Frame size
166
227
334
mm
[in]
136
[5.354]
139.7
[5.500]
154
[6.063]
mm
R
[in]
11.80
[0.465]
11.80
[0.465]
14.35
[0.565]
mm
AA
[in]
317.5
[12.500]
317.5
[12.500]
350.0
[13.780]
E
Port A and B
SAE flange, size 1 1/2
SAE split flange boss
6000 psi
4 threads
5/8 -11 UNC - 2B
35 deep
mm
[in]
122.2
[4.811]
134.9
[5.311]
143.5
[5.650]
mm
S
[in]
42.863
[1.688]
42.863
[1.688]
63.500
[2.500]
mm
BB
[in]
20.6 0.4
[0.811 0.0157]
20.6 0.4
[0.811 0.0157]
0.5
27.0 +- 0.1
+ 0.0197
[1.063 - 0.0039 ]
F
mm
[in]
136
[5.354]
152
[5.984]
161
[6.339]
mm
T
[in]
27
[1.063]
27
[1.063]
40
[1.575]
mm
CC
[in]
6
[0.236]
13
[0.512]
18
[0.709]
mm
[in]
229
[9.016]
264
[10.394]
292
[11.496]
Port L1 and L2
1 5/16 -12 UN - 2B
SAE straight thread
O-ring boss
U
16/32
16/32
16/32
Diameter for
shaft coupling
41.28 + 0.062
[1.625 + 0.0024]
41.28 + 0.062
[1.625 + 0.0024]
61.93 + 0.074
[2.438 + 0.0029]
Port MA and MB
1 7/8 -12 UN - 2B
SAE straight thread
O-ring boss
Port M
7/16-20 UNF-2B
SAE straight thread
O-ring boss
19
DKMH.PN.340.C1.02 520L0516

18-19
mm
[in]
24
[0.945]
27
[1.063]
38
[1.496]
mm
V
[in]
130.0
[5.118]
143.7
[5.657]
158.7
[6.248]
kg
Weight
[lb]
124
[273]
152
[335]
197
[434]
J
11.2.2002, 12:24
OUR PRODUCTS
Hydrostatic transmissions
Hydraulic power steering
Electro-hydraulic power steering
Electric power steering
Closed and open circuit axial piston
pumps and motors
Gear pumps and motors
Bent axis motors
Radial piston motors
Orbital motors
Transit mixer drives
Planetary compact gears
Sauer-Danfoss Hydraulic Power Systems

Market Leaders Worldwide
Sauer-Danfoss is a comprehensive supplier providing complete
systems to the global mobile market.
Sauer-Danfoss serves markets such as agriculture, construction, road
building, material handling, municipal, forestry, turf care, and many
others.
We offer our customers optimum solutions for their needs and
develop new products and systems in close cooperation and
partnership with them.
Sauer-Danfoss specializes in integrating a full range of system
components to provide vehicle designers with the most advanced
total system design.
Sauer-Danfoss provides comprehensive worldwide service for its
products through an extensive network of Authorized Service
Centers strategically located in all parts of the world.
Proportional valves
Directional spool valves
Cartridge valves
Hydraulic integrated circuits
Hydrostatic transaxles
Integrated systems
Fan drive systems
Electrohydraulic controls
Digital electronics and software
Battery powered inverter
Sensors
Sauer-Danfoss (US) Company

2800 East 13th Street
Ames, IA 50010, USA
Phone: +1 515 239-6000, Fax: +1 515 239 6618
Sauer-Danfoss (Neumnster) GmbH & Co. OHG
Postfach 2460, D-24531 Neumnster
Krokamp 35, D-24539 Neumnster, Germany
Phone +49 4321 871-0, Fax: +49 4321 871 122
Sauer-Danfoss (Nordborg) A/S
DK-6430 Nordborg, Denmark
Phone: +45 7488 4444, Fax: +45 7488 4400
DKMH.PN.340.C1.02 520L0516
www.sauer-danfoss.com

20
11.2.2002, 12:24

Axial Piston Motors

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Axial Piston Motors

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Series 20

Axial Piston Motors

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

1999 -2001, Sauer-Danfoss

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

General description ...................................................................................................................................................... 2

Hydraulic parameters ............................................................................................................................................... 7

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

PURGE RELIEF VALVE

SERVO CONTROL CYLINDER

WORKING LOOP (HIGH PRESSURE)

WORKING LOOP (LOW PRESSURE)

CASE DRAIN FLUID

Above figure shows schematically the function of a hydrostatic transmission using an

Main pressure ports

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

External drain fluid loss (l/min)

Typical values for 350 bar [5076 psi]

Driveshaft speed n (min-1) (rpm)

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

System pressure range, input p1

p = 420 bar [6092 psi]

only with POR-valve

System pressure range, output p2

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

for higher speeds contact your Sauer-Danfoss representative

Determination of nominal motor size

Efficiency characteristic curves available on request.

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

Port "L1": Case drain port

Coupling may not protrude

Gauge port "MB"

Gauge port "MA"

Gauge port "M"

High pressure relief

High pressure relief

SAE flange, size 1

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

View X (for SMF 2/033 - 2/052 only)

View X (for SMF 2/070 only)

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

View X (for SMF 2/089 only)

View X (for SMF 2/119 only)

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors

Series20_Axial Piston Motors_TI_012002.indd

Series 20 Axial Piston Motors