Industrial

Hydraulics

Electric Drives
and Controls

Linear Motion and

Assembly Technologies

Pneumatics

Service
Automation

Mobile
Hydraulics

Axial Piston Compact Unit A10CO

RE 92 730/01.98

1/8

open circuit

Size 45
Series 52
Nominal Pressure 250 bar
Peak Pressure 315 bar

Contents

Features

Ordering code

Hydraulic fluid

Technical data

Characteristic curves for pump with pressure controller DR 5

Unit dimensions size 45, clockwise direction of rotation

Unit dimensions size 45, anti-clockwise direction of rotation 7

Circuit diagram

The A10VO compact unit was designed specifically for mobile

applications where it is necessary to boost the A10-inlet with a
full flow boost pump, i.e. hydraulic systems for agricultural
tractors, running on oil from the transmission (common oil
systems). This enables also an effective filtration in the A10inlet line.
A boost pump with a some what larger displacement can
provide extra oil for lubricating purposes.
Central hydraulic unit for mounting to transmission p.t.o.
in mobile applications
Integrated boost pump
A10VO main pump with controller
Filter mounting capability
Integrated pressure relief valves
Reduced pipework
Compact design
Transmission lubrication port
Measurement or monitoring ports
Integrated case drain port inside pilot diameter

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Bosch Rexroth AG | Mobile Hydraulics

A10CO | RE 92 730/01.98

Ordering code

A10C

O 45

/ 52

Hydraulic fluid
Mineral oil (without prefix)
Axial-piston pump
Compact unit in swashplate design, adjustable
Nominal pressure 250 bar, peak pressure 315 bar

A10C

Operating mode
O

Pump, open-circuit
Size
Displacement volume Vg max (cm3)

45

Control options
Pressure controller

DR

Pressure controller, remote controlled

DRG

DRG

Pressure and flow controller

DFR

DFR

DFR

DR

DFR1

see RE 92703

without connection from X to tank

Series
52
Direction of rotation
R

cw
anti-cw

Viewing drive shaft

Seals
V

FPM (fluororubber to DIN ISO 1629)

Shaft end
Spline shaft SAE, shortened

Spline shaft SAE, shortened (higher through-drive torque)

Spline shaft SAE, shortened

1"

1"

7/8"

Mounting flange
C

SAE 2-hole
Port for service lines
Pressure port B
Suction port S
Pressure port B
Suction port S

metric thread side ports

07

SAE on opposite sides, metric fixing thread

12

Boost pump
with integrated boost pump

H00

Valves
with integrated pressure relief valves

Filtration
Filter installed in boost circuit
without filter, mounting option only

F
D

= available
= in preparation

H00 2

RE 92 730/01.98 | A10CO

Mobile Hydraulics | Bosch Rexroth AG

3/8

Hydraulic fluid
Comment on selecting hydraulic fluid
To select the correct hydraulic fluid it is necessary to know the
operating temperature in the tank (open circuit) in relation to
ambient temperature.
The hydraulic fluid must be selected in such a way that service
viscosity lies within the optimum range (opt) for the operating
temperature span, see shaded area in the chart.
We recommend selecting the next higher viscosity class in each
case.
Example: An ambient temperature of X C will produce an
operating temperature in the tank of 60 C. Given the optimum
service viscosity range (opt; shaded area), this will require
viscosity classes VG 46 or VG 68; class to select: VG 68.
Note: The leakage oil temperature, affected by pressure and
speed, is always higher than tank temperature. However,
temperature must not exceed 90 C anywhere in the system.
Please contact us if it is not possible to meet the above conditions
due to extreme service parameters or high ambient temperature.

Please refer to our catalogue sheets RE 90220 (mineral oil) and

RE 90221 (environmentally friendly hydraulic fluids) for detailed
information on selecting hydraulic fluids and on service conditions
before the project planning stage.
Operation with environmentally friendly hydraulic fluids may
result in modifications to the technical specifications; please
consult us if necessary.
Service viscosity range
We recommend selecting the service viscosity (at operating
temperature) in the range of
opt = opt. opt. service viscosity 16...36 mm2/s
for optimum efficiency and useful life, in relation to tank
temperature (open circuit).
Limiting viscosity range
Service limits are set at the following values:
min = 10 mm2/s
briefly at max. permissible leakage oil temperature of
90 C.
max = 1000 mm2/s
briefly on cold start.
Temperature range (see selection chart)
tmin = 25 C
tmax = +90 C

Selection diagram

- 20

20

60

40

80

1000
600
400

100
80
60
40

36
opt

Viscosity (mm2 / s)

00

68

46

32

22

1
VG

VG

VG

VG

VG

200

100
1000

20
15
10
- 25

16

- 10

t min = 25 C

10

30

50

Hydraulic fluid range

Hydraulic fluid filtering at the axial piston pump

To ensure operational reliability, the service fluid must conform
to at least purity class
9 to NAS 1638
18/15 to ISO/DIS 4406.

70

90

10
temperature
t ( C)

t max = + 90 C

4/8

Bosch Rexroth AG | Mobile Hydraulics

A10CO | RE 92 730/01.98

Technical data
Service pressure range, input
Absolute pressure at port S
pabs min __________________________________________________________________ 0.8 bar
pabs max ____________________________________________________________________ 5 bar
Service pressure range, output
Pressure at port B
Nominal pressure pN _____________________________________________ 250 bar
Peak pressure pmax _______________________________________________ 315 bar
(pressures to DIN 24312)

Leakage fluid pressure

Maximum permissible leakage fluid pressure (at port L, L1):
pL max ____________________________________________________________ 2 bar absolut
Always given with end-face leakage oil bore allowing
unrestricted drainage into transmission housing.
Pressure at lubrication oil port G:
pabs min = 1bar

Direction of flow
S to B.

Table of values (theoretical values, ignoring mh and v; values rounded)

Size

45

Displacement volume

Vg max

cm3

45

Max. speed *

at Vg max

no max

rpm

2750

Max. volumetric flow (delivery)

at no max

qVo max

L/min

123

Max. power (p = 250 bar)

at no max

Po max

kW

52

Max. torque (p = 250 bar)

at Vg max

Tmax

Nm

181

kgm2

Moment of inertia around drive axle

Fluid capacity

0.0047

0.6

Mass (without fluid)

kg

27.2

Permissible load on drive shaft:

max. permissible axial force

Fax max

1500

max. permissible lateral force

Fq max

1500

*intermittently 3000 rpm

Application of forces
Fq
Fax

X/2 X/2
X

Calculating size
Volumetric flow

qV =

Drive torque

T =

Drive power

P =

Vg n v

[L/min]

1000
1.59 Vg p

[Nm]

100 mh
2 T n
60000

Tn
9549

qV p
600 t

[kW]

Vg
p
n
v
mh
t

= geometric displacement volume [cm3]

per revolution
= pressure differential [bar]
= speed [rpm]
= volumetric efficiency
= mechanical-hydraulic efficiency
= total efficiency (t = v mh)

RE 92 730/01.98 | A10CO

Mobile Hydraulics | Bosch Rexroth AG

Characteristic curves for pump with

pressure controller DR
Drive power and delivery rate (volumetric flow)
(service fluid: hydraulic oil ISO VG 46 DIN 51519, t = 50 C)

Size 45
n = 1500 rpm
n = 2600 rpm

120

Volume rate of flow qV [L/min]

100

50

qV

80

PqV max

60

40
30

40

20
PqV

20

10
0

50

100

150

200

Service pressure p [bar]

250

Drive power P[kW]

60

5/8

6/8

Bosch Rexroth AG | Mobile Hydraulics

A10CO | RE 92 730/01.98
Before finalising your design, please request certified assembly drawing.
Subject to alteration without notice.

Unit dimensions size 45, clockwise direction of rotation

Type A10CO 45

DR
DFR
DFR1 /52 R -V U C 07 H00 2 D
DRG
12
F

102

127,5

31

L1

80

21,5

15,1

87

90

101

7/8"

G
M2

G
21

9,5

1 3/8" UNF
57

S
M1

A/C

10
41

10
32

70,5

102,5

185
244
235

Shaft 22-4 (SAE B) shortened

SAE J744 OCT 83
30 mesh angle,
13 teeth,
16/32 pitch

Filter supplied with unit

for type F

175

94

B
View W

109

SW 19
50 Nm

SW 19
10 Nm
SW 6

View V
Pressure port B

52,4 +0,2
- 0,2
M10

26,2 +0,2
- 0,2

Model 12

S
25

Ports see page 7

RE 92 730/01.98 | A10CO

Mobile Hydraulics | Bosch Rexroth AG

7/8

Before finalising your design, please request certified assembly drawing.

Subject to alteration without notice.

Unit dimensions size 45, anti-clockwise direction of rotation

Type A10CO 45

DR
DFR
DFR1 /52 L -V U C 07 H00 2 D
DRG
12
F

Shaft 22-4 (SAE B) shortened

SAE J744 OCT 83
30 mesh angle,
13 teeth,
16/32 pitch
244

141,5
109
102,5

31

L1

21,5

15,1

101,5

7/8"

G
M2
21

9,5

M1
S

A/C

1 3/8" UNF
57

Filter supplied with unit

for type F
dimensions see page 6

99,2

185

View W

175
94

SW19
10Nm
80

SW19
50Nm

SW 6

157

164

S
70,5

View V

Model 07
M33x2
M48x2
1 3/8" UNF-2B

Model 12
SAE 1" (standard pressure)
M48x2
1 3/8" UNF-2B

M12x1,5 integrated M12x1,5 integrated

7/8-14UNF-2B
7/8-14UNF-2B

X
Control pressure port
M14x1,5
with pressure controller DR X port closed
G
Transmission lubrication port M18x1,5
M10x1
M1, M2 Measurement ports

M14x1,5
M18x1,5
M10x1

25

Ports
B
Pressure port
S
Suction port
A/C Filter port, feed pump
to DIN 71457-A1,2
L
Case drain port
Case drain port
L1

M10

Pressure port B Model 12

102

26,2 +0,2
- 0,2

52,4 +0,2
- 0,2

10

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Bosch Rexroth AG | Mobile Hydraulics

A10CO | RE 92 730/01.98

Circuit diagram
Type A10CO 45 DFR /52 X- V U C XX H00 2D
F

X
LS

1 bar

Filter supplied with unit

for type F

A
must be set 10% higher
than DR-control

C
M2

S
not supplied with unit

100 m

L, L1

M1

p = max 0.2 bar at 130 L/min

Ports
B
S
A/C
L, L1

Pressure port
Suction port
Filter port, feed pump
Case drain ports

X
Control pressure port
with pressure controller DR X port closed
G
Transmission lubrication port
M1, M2 Measurement ports
Bosch Rexroth AG
Mobile Hydraulics
Product Segment Axial Piston Units
Horb Plant
An den Kelterwiesen 14
72160 Horb, Germany
Telephone +49 (0) 74 51 92-0
Facsimile +49 (0) 74 51 82 21
info.brm-ak@boschrexroth.de
www.boschrexroth.com/brm

2003 by Bosch Rexroth AG, Mobile Hydraulics, 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 Bosch Rexroth AG. In the
event of contravention of the above provisions, the contravening party is obliged
to pay compensation.
The data specified above only serve to describe the product. No statements
concerning a certain condition or suitability for a certain application can be
derived from our information. The given information does not release the user
from the obligation of own judgement and verification. It must be remembered
that our products are subject to a natural process of wear and aging.