Bosch Rexroth A10VO Technical document

The Drive & Control Company
A10VO Variable
Displacement Piston Pump
Technical Information Manual
Linear Motion and
Assembly Technologies ServicePneumaticsHydraulics
Electric Drives
and Controls

A10VO PISTON PUMP MANUAL-MODULE 3A
Reproduction or use of editorial or pictorial content in any manner is
prohibited without the express permission of:
BOSCH REXROTH CANADA CORP.
While every precaution has been taken in the preparation of this manual,
the publisher assumes no responsibility for errors or omissions. Neither is
any liability assumed for damages resulting in the misuse of the printed
material contained herein.
First Edition 1996
Revised Edition 2006
Printed in Canada for:
Bosch Rexroth Canada Corp.
3426 Mainway Drive
Burlington, Ontario
Canada L7M 1A6
Phone: [phone]
Fax: [phone]
Toll Free: 1-877-266-7811
1-877-COMPU-11
Bosch Rexroth Canada Corp. 3426 Mainway Dr. Burlington, ON L7M 1A8 www.boschrexroth.ca
16/06/2006 Page 2 of 23

A10VO PISTON PUMP MANUAL-MODULE 3A
TABLE OF CONTENTS
FEATURES...................................................................................................................................... 4
FUNCTIONAL PURPOSE ............................................................................................................... 4
DESCRIPTION ................................................................................................................................6
SPECIFICATIONS........................................................................................................................... 7
Pressure ...................................................................................................................................... 7
R.P.M .......................................................................................................................................... 7
Case Drain................................................................................................................................... 7
OPERATING CONDITIONS............................................................................................................ 7
Operating Viscosity...................................................................................................................... 7
Recommended Filtration ............................................................................................................. 7
Inlet Conditions ............................................................................................................................ 7
Leakage Line ............................................................................................................................... 8
Direction of Rotation .................................................................................................................... 8
DFR CONTROL............................................................................................................................... 9
CONTROL VALVE ASSEMBLY .................................................................................................... 10
Identification Drawing ................................................................................................................ 10
Pressure Regulation .................................................................................................................. 10
Flow Regulation......................................................................................................................... 11
PUMP PERFORMANCE TEST ..................................................................................................... 11
TEST EQUIPMENT ....................................................................................................................... 12
Gauge Test Port Kit ................................................................................................................... 12
PORT SIZES ................................................................................................................................. 12
OPTIONAL ACCESSORIES ......................................................................................................... 13
Low Oil Shut–Off Block.............................................................................................................. 13
UNIT DIMENSIONS ...................................................................................................................... 14
STANDARD MODELS USED........................................................................................................ 22
STANDARD SPARE PARTS......................................................................................................... 23
Replacement Pump Control Valve ............................................................................................ 23
Replacement Seal Kits .............................................................................................................. 23
Split Flanges .............................................................................................................................. 23
Bosch Rexroth Canada Corp. 3426 Mainway Dr. Burlington, ON L7M 1A8 www.boschrexroth.ca
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A10VO PISTON PUMP MANUAL-MODULE 3A
FEATURES
•High Efficiency through load sensing (= fuel savings)
•Maximum Pressure Control Built In
•Long Service Life
•Large Range of Flow Rates Available
•Low Noise Level
•Cast Iron Construction
•Standard Mounting Flange Dimensions
•Standard Drive Shaft Dimensions
•Direct Engine Mount or PTO Drive Capability
FUNCTIONAL PURPOSE
This pump is preferred over a fixed displacement (gear) pump. A fixed displacement pump
delivers a set volume of oil for each revolution of its drive shaft. Any of this fluid flow that is not
required, by the hydraulic system to do work, is sent back to the oil reservoir over a restriction.
This oil flow times the pressure difference (between the system and the reservoir) is power that
has been drawn from the engine and is now being turned into heat. The heat generated is a direct
indication of fuel wasted and of unnecessary wear and tear on the hydraulic fluid, thus on the
hydraulic system's mechanical components.
On the other hand, this variable displacement pump monitors (senses) by way of a small
hydraulic line connecting it to the control valves – the power requirement (load) on your hydraulic
system and provides just enough fluid flow and pressure to meet your system's immediate need.
This means that the pump can be left running constantly and as your system's requirement
changes the pump will simply adjust itself accordingly. By doing this, energy is not wasted away
in the form of heat; translating into fuel savings for you and less wear and tear in your hydraulic
system.
An adjustable pressure limit (up to 4100 PSI) is also built onto the pump. It operates by reducing
the output flow – all the way to zero if necessary – keeping the pressure supply to your hydraulic
system from ever going too high.
Different maximum displacements (sizes) with standard mounting flanges, are available to match
the needs of your system. Also, various combinations of drive shafts (splined or keyed), rotation
directions (left hand or right hand) and port locations (rear or side) can be chosen to facilitate your
particular installation requirements (ie. direct engine mounting as well as transmission power take
off mounting can be accommodated).
Bosch Rexroth Canada Corp. 3426 Mainway Dr. Burlington, ON L7M 1A8 www.boschrexroth.ca
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A10VO PISTON PUMP MANUAL-MODULE 3A
FUNCTIONAL PURPOSE CONTINUED
Variable displacement swash plate design piston pump.
1. Housing
2. Control Piston
3. Drive Shaft
4. Swash Plate
5. Control Valve Assembly
6. Pistons (x7)
Bosch Rexroth Canada Corp. 3426 Mainway Dr. Burlington, ON L7M 1A8 www.boschrexroth.ca
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