Model A10V0 Piston Pump Manual - cqh.com.au

1 The Drive & Control CompanyA10VO VariableDisplacement Piston PumpTechnical Information ManualLinear Motion andAssembly TechnologiesServicePneumaticsHydraulicsE lectric Drives and ControlsA10VO 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.

2 First Edition 1996 Revised Edition 2006 Printed in Canada for: Bosch Rexroth Canada Corp. 3426 Mainway Drive Burlington, Ontario Canada L7M 1A6 Phone: (905) 335-5511 Fax: (905) 335-9859 Toll Free: 1-877-266-7811 1-877-COMPU-11 Bosch Rexroth Canada Corp. 3426 Mainway Dr. Burlington, ON L7M 1A8 16/06/2006 Page 2 of 23 A10VO Piston PUMP Manual -MODULE 3A TABLE OF CONTENTS 4 FUNCTIONAL 4 7 7 .. 7 Case 7 OPERATING 7 Operating 7 Recommended 7 Inlet 7 Leakage Direction of 8 DFR CONTROL VALVE 10 Identification 10 Pressure 10 Flow 11 PUMP PERFORMANCE 11 TEST 12 Gauge Test Port 12 PORT 12 OPTIONAL 13 Low Oil Shut Off 13 UNIT 14 STANDARD MODELS 22 STANDARD SPARE 23 Replacement Pump Control 23 Replacement Seal 23 Split 23 Bosch Rexroth Canada Corp.

3 3426 Mainway Dr. Burlington, ON L7M 1A8 16/06/2006 Page 3 of 23 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.

4 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.

5 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.

6 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.)

7 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 16/06/2006 Page 4 of 23 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 16/06/2006 Page 5 of 23 A10VO Piston PUMP Manual -MODULE 3A DESCRIPTION Axial Piston pumps Model A10V0 are swash plate design variable displacement pumps .

8 As illustrated by the picture under functional purpose they basically consist of a housing (1), control pistons (2) located inside cylinder barrel, drive shaft (3), swash plate (4), a control valve assembly (5), and pistons (6) This Piston pump smoothly and continuously varies its displacement (volumetric output size), by altering the angle of its swash plate. As your system operates, valves monitor the loads (pressures) on the actuators (cylinders and motors) and control the swash plate accordingly. The greater the angle of the swash plate, relative to the drive shaft, the further the pistons stroke in and out, therefore the greater the fluid flow.

9 There are two control valves, located in a removable housing, bolted to the pump. The standard type of control used is referred as flow and pressure compensation, type DFR. A simple explanation of how this works is described in the next paragraph. We have limited the explanation to one short paragraph as a detailed explanation goes beyond the technical requirements of this Generic Manual . The flow and pressure compensator control, also known as a load sensing control, matches pump output flow and pressure to system demand. This control will automatically regulate the pump displacement to deliver the flow required to maintain a constant pressure drop across a valve spool or other flow limiting device.

10 When there is no system demand, the pump stands by at zero flow and low pressure. When the system demands flow, the pump delivers only the flow required by the system, at a pressure required to move the load. To protect the system from infinite load pressures, the pressure compensator section of the control will cause the pump to automatically de-stroke when the pre adjusted maximum system pressure is reached. Bosch Rexroth Canada Corp. 3426 Mainway Dr. Burlington, ON L7M 1A8 16/06/2006 Page 6 of 23 A10VO Piston PUMP Manual -MODULE 3A SPECIFICATIONS Pressure The pressure range for the standard models used as outlined under standard models is 4,100 PSI maximum.