Industrial

Hydraulics

Electric Drives
and Controls

Linear Motion and

Assembly Technologies

Pneumatics

Service
Automation

Mobile
Hydraulics

Variable displacement pump A10VSO

RE 92 712/10.07 1/16
Replaces: 02.94

open circuit

Size 18
Series 31
Nominal pressure 280 bar
Peak pressure 350 bar
Contents

Features

Ordering code

Hydraulic fluid

Technical data

Installation notes, noise characteristics

Unit dimensions size 18, PA12

Unit dimensions size 18, UC62

Pressure controller DR

7
8

Pressure controller, remote controlled DRG

Variable displacement axial piston pump A10VSO in

swashplate construction is designed for hydrostatic
transmissions in open circuits.
It can be used in mobile and industrial applications.
Flow is proportional to the drive speed and the
displacement. By adjusting the position of the swashplate
it is possible to steplessly vary the flow.
ISO or SAE mounting flange

Pressure flow controller DFR / DFR1

10

SAE flanged connections

with metric or UNC fixing threads

Unit dimensions DFR / DFR1

11

2 case drain ports

Pressure and flow controller, electronic DFE1

12

Good suction characteristics

Unit dimensions DFE1

13

Permissible continuous operating pressure 280 bar

Through drive, unit dimensions combination pumps

14

Low noise level

Unit dimensions through drives K01 and K52

15

Long service life

Axial and radial loading of drive shaft possible
Low specific weight
Short control times
Through drive for multi-circuit system possible

A10VSO size 28 ... 140

see RE 92711

2/16

Bosch Rexroth AG | Mobile Hydraulics

A10VSO | RE 92 712/10.07

Ordering code

A10VS O 18

Hydraulic fluid
Mineral oil (without short code)

31

prefered program
with short delivery times
type list see page 15

Axial piston unit

Swashplate design, variable, industrial range
Nominal pressure 280 bar, peak pressure 350 bar

A10VS

Mode of operation
O

Pump, open circuit

Size
Flow Vg max (cm3)

18

Control device
Pressure controller

DR
DR

DR

DRG

DFR

DFR1

DFE1

remote controlled
Pressure and flow controller

DFR
DFR

X-channel plugged
Pressure and flow controller, electronic

DFE1

Series
31

Direction of Rotation
Viewed on drive shaft

clockwise

anti-clockwise

Seals
Perbunan (shaft sealing ring in Viton)

Viton

Shaft end

DIN

SAE

Parallel with key DIN 6885

Parallel with key 19-1 (SAE A-B)

Splined

19-4 (SAE A-B, 3/4")

Splined

16-4 (SAE A, 5/8", not suitable for through drive)

Mounting flange
ISO 2-hole

SAE 2-hole

Service line connections

Pressure port B
Suction port S

SAE ports on opposite sides

metric fixing threads

12

Pressure port B
Suction port S

SAE ports on opposite sides

UNC fixing threads

62

Through drive
Without through drive

N00

With through drive for building on axial piston unit or gear pump
Mounting flange

Shaft/coupling

for mounting:

82-2 (SAE A)

Splined shaft 16-4 (SAE A; 5/8")

G2

K01

= available

82-2 (SAE A)

Splined shaft 19-4 (SAE A-B; 3/4")

A10VSO 18

K52

= in preparation
= not available

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

3/16

Notes on hydraulic fluid selection

Hydraulic fluid
For detailed information on the range of fluids and their

In order to select the correct fluid it is necessary to know the

application conditions please see our data sheets RE 90220

operating temperature in the tank (open loop) in relation to the

(mineral oil), RE 90221 (environmentally acceptable hydraulic

ambient temperature.

fluids) and RE 90223 (HF hydraulic fluids). When operating with

The hydraulic fluid should be selected so that within the

environmentally acceptable hydraulic fluids and HF fluids it may

operating temperature range the operating viscosity lies within

be necessary to consider certain modifications to the technical

the optimum range (opt) - see shaded area of selection diagram.

data; please contact our technical department. Operation with

We recommend that the highest possible viscosity range should

Skydrol hydraulic fluid strictly subject to consultation.

be chosen in each case.

Operating viscosity range

temperature in the tank is 60C. Within the operating viscosity

Example: At an ambient temperature of X C the operating

In the interests of ensuring optimum efficiency and service life we

range (opt; shaded area) this corresponds to viscosity classes

recommend that the operating viscosity (at operating

VG 46 or VG 68. VG 68 should be selected.

temperature) is selected from within the range

Important: The case drain oil temperature is influenced by

pressure and pump speed and is always higher than the tank

opt = opt. operating viscosity 16...36 mm2/s

temperature. However, at no point in the installation may the

temperature exceed 90 C.

with reference to the tank temperature (open circuits).

Please consult us if compliance with the above conditions is not

possible due to extreme operating parameters or high ambient

Viscosity limits

temperatures.

The following values apply in respect of viscosity limits:

Fluid filtration

min = 10 mm2/s
short-term at maximum permissible drain temperature
of 90 C.

Correct functioning of the unit calls for a minimum level of

cleanliness
to NAS, 1638 class 9

max = 1000 mm2/s

to SAE, ASTM, AIA or

to ISO/DIS 4406 18/15

Temperature range (cf: selection diagram)

This can be achieved, for example, using filter element

tmin = 25 C

type ...D 020...(see RE 31278).

tmax = + 90 C

This gives a filter quotient of

20 100.

Selection diagram
0

20

20

60

40

80

1000
600
400

100
80
60
40

36
opt

Viscosity
(mm2/s)
Viskositt
(mm2/ s)

68

46

32

22

0
10
VG

VG

VG

VG

VG

200

100
1000

20
15
10
- 25

16

- 10

10

30

50

Fluid temperature range

70

90

Mechanical flow limiting

Mechanical flow limiting on the version without through drive
it is standard, it is not possible with through drive

10
Temperature
Temperatur
t ( C)
t (C)

Qmax : Setting range Vg max to 50% Vg max

Combination pumps
1. If a second Brueninghaus pump is fitted in the factory, both ordering codes should be joined with "+" .

Typical order format: A10VSO 18DFR/31R-PSC62K52 + A10VSO 18DFR/31R-PSC62N00

2. If a gear pump is fitted in the factory please consult us (RE 90139 in preparation).

4/16

Bosch Rexroth AG | Mobile Hydraulics

A10VSO | RE 92 712/10.07

Technical data
(suitable for operation on mineral oil;
for water based fluids see RE 90223 and
environmentally acceptable fluids see RE 90221)
Determination of inlet pressure pabs at suction port S or
reduction in output flow for increasing speed
0,8 bar
30 bar

280 bar
350 bar

1,6
Speed n/nmax

Operating pressure range - Outlet side

Pressure at port B
Nominal pressure pN
Peak pressure pmax
(Pressure information to DIN 24312)

1,2
1,4

1,1

1,2
1,0

1,0
Case drain pressure
Maximum permissible pressure of case drain fluid (at port L, L1):
Maximum 0.5 bar higher than inlet pressure at port S,but no
higher than 2 bar absolute.

0,9
0,9

0,7

0,8

0,9

0,8
1,0

Displacement Vg/Vg max

Through flow direction
S to B.
Table of values (theoretical values, rounded off without taking into consideration mh and v)
Size

18

Displacement
Max. speed1)

at Vg max

Max. permissible velocity (speed limit)

Vg max

cm

18

no max

rpm

3300

no max zul

rpm

3900

Qo max

L/min

59,4

L/min

27

kW

27,7

kW

12,6
80,1

on increase in inlet pressure pabs or Vg < Vg max

Max. flow

at no max
at nE = 1500 rpm

Po max

Max.power
(p = 280 bar)

at no max

Max. torque (p = 280 bar)

at Vg max

Mmax

Nm

Torque (p = 100 bar)

at Vg max

Nm

at nE = 1500 rpm

Moment of inertia about drive axis

Fill capacity

28,6
2

kgm

0,00093

0,4

Weight without (oil fill)

kg

12

Permissible shaft loading

Max. permissible axial force

Fax max

700

Max. permissible radial force 2)

Fq max

350

) These values are valid for an absolute pressure of 1 bar at suction port S.
By reducing the output flow or increasing the input pressure
the speed can be increased as shown in the diagram.

Application of

Fq

forces
Fax

) For higher radial forces please consult us.

X/2 X/2

Determination of size
Flow

Q=

Drive torque

M=

Drive capacity

P=

Vg n v

[L/min]

1000
1,59 Vg p

[Nm]

100 mh
2 M n
60000

Mn
9549

Qp
600 t

[kW]

Vg
p
n
v
mh
t

= geometric displacement [cm ]

per revolution
= Differential pressure [bar]
= Speed [rpm]
= Volumetric efficiency
= Mechanical hydraulic efficiency
= Overall efficiency (t = v mh)

Inlet pressure pabs [bar]

Operating pressure range - Inlet side

Absolute pressure at port S
pabs min
pabs max

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

5/16

Installation notes
The installation position is optional. The pump housing must be filled with hydraulic fluid during commissioning and stay full when
operating. In order to ensure the lowest possible noise values all connections (suction, pressure and drain connections) must
be flexible.
Avoid a non-return valve in the drain line. In exceptional cases this may be permissible, but only after prior consultation with us.
For detailed installation notes and commissioning information see RE 90400 (in prep.)

Characteristic curves for pump with pressure controller DR

Noise levels
Measured in an anechoic chamber
Distance from microphone to pump = 1 m
Measuring error: 2 dB (A)
(Fluid: ISO VG 46 DIN 51519, t = 50 C)
Size 18

Noise level LA [dB(A)]

74
72

Qmax

70

Qzero

68

n = 3000 rpm
Qmax

66
Qzero
64

n = 1500 rpm

62
60
58
56
0

50

100

150

200

250

280

Operating pressure p [bar]

Drive power and output flow

80
60
PQ max

40
20

PQ zero

0
0

Size 18
n = 1500 rpm
n = 3300 rpm

50

100

150

200
250
280
Operating pressure p [bar]

30
25
20
15
10
5
0

Drive power P [kW]

Flow Q [L/min]

(Fluid:
Hydraulic oil ISO VG 46 DIN 51519, t = 50 C)

6/16

Bosch Rexroth AG | Mobile Hydraulics

A10VSO | RE 92 712/10.07
Before finalising your design, please request a certified drawing.
All rights reserved, subject to revision

Unit dimensions size 18

ISO version with keyed shaft PA12,
Through drive version N00 (without through drive)
not including control

V
L
2 hole flange

L1

W
View W

View V

S
M10
17
17deep
tief

B
S
L/L1

Pressure port
Suction port
Case drain ports

mech. displacement limiter

SAE 3/4"
SAE 1"
M16x1,5

(Standard pressure series)

(Standard pressure series)
(L1 plugged at factory)

B
M10
17
17deep
tief

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

Before finalising your design, please request a certified drawing.

All rights reserved, subject to revision

Unit dimensions size 18

SAE version with SAE splined shaft UC62,
Through drive version N00 (without through drive)
not including control

V
L
2 hole flange

L1

16-4 (SAE A)
16/32DP; 9 T

mech. displacement limiter

View W

View V

S
20 deep

B
20 deep

Shaft end "S"

3/4"

19-4 (SAE A-B)

16/32DP; 11 T

22
30

38

Shaft end "K"

B
S
L/L1

Pressure port
Suction port
Case drain ports

7/16

SAE 3/4"
SAE 1"
9/16-18 UNF-2B

(Standard pressure series)

(Standard pressure series)
(L1 plugged at factory)

8/16

Bosch Rexroth AG | Mobile Hydraulics

DR

A10VSO | RE 92 712/10.07
Before finalising your design, please request a certified drawing.
All rights reserved, subject to revision

Pressure controller

The constant pressure control serves to maintain a constant

pressure in a hydraulic system within the control range of the
pump. The pump therefore supplies only the amount of hydraulic
fluid required by the system. Pressure may be steplessly set at
the pilot valve.

Static curve
(at n1 = 1500 rpm; toil = 50 C)

Flow Q

Hysteresis and pressure increase p

S
Setting range

20

280
Operating pressure p [bar]

Dynamic Curves
The operating curves are measured mean values taken under
test conditions with the unit mounted inside the tank.
Conditions: n = 1500 rpm
toil = 50 C
Pressure cut-off at 350 bar
Load steps were obtained by suddenly opening and closing the
pressure line with a pressure relief valve as load valve 1 m from
the mounting flange of the axial piston unit.

350

Ports
B
S
L, L1

L1

Pressure port
Suction port
Case drain ports( L1 plugged)

Controller data
Hysteresis and pressure increase p __________ max. 4 bar
Pilot oil requirement _______________ max. approx. 3 L/min
Loss of flow at Qmax see page 5.
Control time

Size
18

tSA (ms)
at 50 bar
50

tSA (ms)
at 220 bar

tSE (ms)
zero stroke 280 bar

25

20

Unit dimensions

Operating pressure p [bar]

300
250
200

150
100
50

Pilot valve installed here

for anti-clockwise rotation

Pilot valve installed here

for clockwise rotation

Adjustment screw for

pressure controller stalled
pressure

104,5

Displacement
(swivel angle)

Vgmax

V gmin
Control time t
Control time (out) tSA

Control time (in) tSE

View Y
125,5
DFR valve, flow controller blocked and not tested

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

9/16

Before finalising your design, please request a certified drawing.

All rights reserved, subject to revision

DRG

Pressure controller, remote

controlled

Not included in
supply

Function and equipment as for DR.

A pressure relief valve can be connected here at port X. This is
not included in the items supplied for the DRG control
The standard setting for differential pressure at the pilot valve is
20 bar. The amount of pilot oil required is approx. 1.5 L/min. If a
different setting is required (range 10-22 bar) please indicate in
clear text.
We recommend the following as a separate pressure relief valve:
DBDH 6 (hydraulic) to RE 25402,
DBEC-3X (electrical) to RE 29142 or
DBETR -SO 381 w. nozzle 0.8 in P (electrical) to RE 29166.
Max. line length should not exceed 2 m.
Static curve
(at n1 = 1500 rpm; toil = 50 C)
Hysteresis and pressure increase p

Flow Q

Ports
B
S
L, L1
X

Setting range

Pressure port
Suction port
Case drain ports ( L1 plugged)
Pilot pressure port

Unit dimensions
20

A5 (SAE)

280
Operating pressure p [bar]

Threaded
connection
7/16-20 UNF-2B

A5 (ISO)

Controller data
Hysteresis and pressure increase p __________ max. 4 bar
Pilot oil requirement __________________ approx. 4.5 L/min
Loss of flow at Qmax see page 5.

Pilot valve installed here

here for anti-clockwise rotation

Pilot valve installed

for clockwise rotation
Adjustment screw for
Adjustment screw for
differential pressure
maximum pressure cut-off

A4

A1

View Y
Size

A1

A2

A3

A4

A5

Port X

18ISO 104,5 125,5 109

40

109 M14x1,5;12 deep

18SAE 104,5 125,5 109

40

130 7/16-20 UNF-2B;10 deep

A3
A2

10/16

Bosch Rexroth AG | Mobile Hydraulics

DFR/DFR1

A10VSO | RE 92 712/10.07

Pressure - Flow controller

In addition to operation of the pressure controller it is also

possible to set the pump flow by means of differential pressure
at the actuator (e.g. an orifice).
In model DFR1 the X port is plugged.
Static curve
(at n1 = 1500 rpm, toil = 50 C)

Not included
in supply
Plugged on
DFR 1

Hysteresis and pressure p

Flow Q

Q (see table)

Adjustment range

20

280
Operating pressure p [bar]
S

L1

Static curve at variable speed

Flow Q

Q (see table)

Connections
B
S
L, L1
X

350
300
280
250

Displacement Vg %

100
75

200

50

150
100

25

Load pressure [bar]

Speed n
Dynamic flow control curve
The curves are mean values measured under test conditions,
pump in tank

50
18

(stand by)

Control time t
Control time (out) tSA Control time (in) tSE
Control time
Size

tSA (ms)
tSA (ms)
tSE (ms)
stand by-280 bar 280 bar-stand by 50 bar-stand by

18

40

15

40

Pressure port
Suction port
Case drain ports ( L1 plugged)
Pilot pressure port

Differential pressure p:
Adjustable between 10 and 22 bar (higher values on request).
Standard setting: 14 bar. If another setting is required please
state in clear text.
When pressure is relieved on port X to tank a stalled pressure
of p = 18 2 bar ("stand by") is set.

Controller data
Max. flow deviation (hysteresis and increase)
measured at drive speed n = 1500 rpm
Size
Qmax

L/min

18
0,9

Hysteresis and pressure increase p __________ max. 5 bar

Pilot oil requirement DFR ______ max. approx. 3 ... 4,5 L/min
Pilot oil requirement DFR1 __________ max. approx. 3 L/min
Loss of flow at at Qmax see page 5.

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

11/16

Before finalising your design, please request a certified drawing.

All rights reserved, subject to revision

Unit dimensions
A5 (SAE)
Threaded
connection
7/16-20 UNF-2B

A5 (ISO)

Adjustment screw for

pressure controller stalled pressure

Adjustment screw
for flow controller
differential pressure

A4

A1

A3
A2
Pilot valve installed here
for anti-clockwise rotation

Size

A4

A5

18ISO 104,5 125,5 109

A1

A2

A3

40

109 M14x1,5;12 deep

Port X

18SAE 104,5 125,5 109

40

130 7/16-20 UNF-2B;10 deep

Pilot valve installed here

for clockwise rotation

12/16

Bosch Rexroth AG | Mobile Hydraulics

A10VSO | RE 92 712/10.07

DFE1 Pressure and flow controller,

electronic
Pressure and flow to the pump are controlled by an electrically
operated proportional valve. Flow control is via the variable
pump swivel angle wthout compensation for drive speed
variations (e.g. due to the diesel motor). Pump pressure and
pump position are signalled via a pressure sensor and inductive
positional transducer to the amplifier card which is required to
operate the closed loop control.

1.1
B

DFE1 model pump is suitable for operation with analogue

amplifier card VT 5041.
The amplifier card and the pressure sensor should be ordered
separately.

1.2

For safety reasons an additional pressure relief valve should be

installed in addition to the pump pressure controller. This is to
safeguard the maximum permissible operating pressure.

For further information and some typical applications see

RE 67016 and RE 98090.

Static curves
End of control

Ports
B
S
L, L1

Flow Q [%]

100

L1

Pressure port
Suction port
Case drain ports ( L1 plugged)

Components
1
A10VSO with hydraulic setting device
1.1 Proportional valve
1.2 Inductive positional transducer
Pressure sensor and control electronics are loose items
(please order separately to RE 67016)

12

Operating pressure p [bar]

280

Control data
Hysteresis

< 1% of Vg max

Repeatability

< 1%

Pilot oil requirement

max. approx. 2.5 L/min

Loss of flow at Qmax see Page 5.

160
140
120
100
80
60

Pressure stepped signal value 120 bar 40 bar

DFE1 45 with compression oil volume (5L)

Operating pressure p [bar]

Operating pressure p [bar]

Dynamic curves
Pressure stepped signal value e.g. 40 bar 120 bar
DFE1 45 with compression oil volume (5L)

psoll
comm.

pist
act.

40
20
0

160
140
120
100
80

pist
act.

60
40

psoll
comm.

20
0
50 ms

Control time

50 ms

Control time

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

Unit dimensions
DFE1 pressure and flow controller, electronic

Before finalising your design, please request a certified drawing.

All rights reserved, subject to revision

Pilot valve installed here

for anti-clockwise rotation

Size

A1

A2

A3

18

97

106,5 118

A4

A5

158 63

A6
216

13/16

Pilot valve installed here

for clockwise rotation

14/16

Bosch Rexroth AG | Mobile Hydraulics

A10VSO | RE 92 712/10.07
Before finalising your design, please request a certified drawing.
All rights reserved, subject to revision

Through drive
The A10VSO axial piston unit can be supplied with through drive
in accordance with the coding on page 3.
The type of through drive is determined by the coding (KXX).

Permitted bending moment

m1

The following are included in the supply:

Hub, fixing screws, seal and, if required, an intermediate
flange.

m2

m3

l1

Combination pumps
By building on other pumps mutually independent circuits can be
made available for use.
1.
If the combination pump consists of 2 Brueninghaus
units and if these are to be supplied assembled
then the two ordering codes should be joined with "+".
Typical order:
A10VSO 18 DR/31 RPSC12K52 +
A10VSO 18 DR/31 RPSC12N00
2.

If a gear- or radial piston pump is to be fitted at the

factory please consult us.

l2
l3

m1, m2 [kg]
l1, l2 [mm]

Weight of pump
Centre to centre spacing
Mm = (m1 x l1 + m2 x l2 + m3 x l3) 1 [Nm]
102
Size

18

Permitted bending moment Mm zul Nm

50

Weight

kg

12

Centre to centre spacing

l1

mm 90

Permitted through drive torque

MGes
total

MGes
total

MD2

MD1

MD1

Size

MD2

18

Max. permitted. total through drive torque at shaft "S", Pump 1

(Pump 1 + Pump 2)
MGes max Nm 80
1

Unit dimensions: combination pumps

Permitted.through

MD1max Nm

80

drive torque.

MD2max Nm

Permitted.through

MD1max Nm

drive torque.

MD2max Nm

80

A10VSO + A10VSO

A1
A2
A3
A4
Main p.
A10VSO 18
2nd pump
A2 A3 A4 A1
A10VSO 18

A2

A10VSO 28
A3 A4 A1

A2

A10VSO 45
A3 A4 A1

A2

A10VSO 71
A3 A4 A1

A2

A10VSO 100
A3 A4 A1

A2

A10VSO 140
A3 A4

164 204 349 399 164 204 349 399 184 229 374 424 217 267 412 462 275 338 483 533 275 350 495 545

See RE 92711

RE 92 712/10.07 | A10VSO

Mobile Hydraulics | Bosch Rexroth AG

15/16

Before finalising your design, please request a certified drawing.

All rights reserved, subject to revision

Built-on A10VSO 18
Order code K01 or K52

A5
A4
A6

45 o

A7

nur Konly
01
K01

A8

A9

A3
A2
up to pump mounting surface
Size

A2

A3

A4

A5

A6

K01

182

10

43,3

M10;16 deep

spline SAE A,

5/8";

16/32DP; 9T

82,55

106,5

K52

182

10

43,3

M10;16 deep

spline SAE A-B,

3/4";

16/32DP; 11T

82,55

106,5

prefered program (short delivery times)

Ident.-Nr.

Type

947666

A10VSO 18 DFR

/31L-PSC62N00

940520

A10VSO 18 DFR

/31R-PPA12N00

945178

A10VSO 18 DFR1

/31R-PPA12N00

942503

A10VSO 18 DR

/31R-PPA12N00

A7

A8

A9

16/16

Bosch Rexroth AG | Mobile Hydraulics

Brueninghaus Hydromatik GmbH

Plant Horb
An den Kelterwiesen 14
72160 Horb, Germany
Tel. +49 (0) 74 51-92-0
Fax +49 (0) 74 51-82 21
info.brm@boschrexroth.de
www.boschrexroth.com/brm

A10VSO | RE 92 712/10.07

2002 by Brueninghaus Hydromatik GmbH, 72160 Horb

All rights reserved. No part of this document may be reproduced or
stored, processed, duplicated or circulated using electronic systems, in
any form or by any means, without the prior written authorization of
Brueninghaus Hydromatik GmbH. Violations shall give rise to claims for
damages.
The data specified above only serve to describe the product. They do not
indicate any specific condition or suitability for a certain application. The
information provided does not release the user from the obligation of own
judgement and veification. It must be remembered that our products are
subject to natural wear and ageing.