Sauer Danfoss SPV2 Series - Table of Contents

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DKMH.PS.315.B1.02 520L0535
Series 20 – Axial Piston Pumps
Service Manual and Repair Instructions
Contents
CONTENTS Introduction and description ................................................................................................................................... 2
Model Code ....................................................................................................................................................................... 4
Recommended tools and installation .................................................................................................................. 5
List of tools necessary for minor repairs and maintenance of units of all sizes ................................... 5
Additional tools list for complete stripping of units ...................................................................................... 5
Measuring instruments ............................................................................................................................................ 5
Trouble shooting, gauge installation and information ................................................................................. 6
Start-up procedure ....................................................................................................................................................... 7
Preconditions for trouble-free operation .......................................................................................................... 7
First-time operation ................................................................................................................................................... 8
Plumbing installation (variable displac. pump - xed displac. motor) ................................................. 10
System circuit description .................................................................................................................................... 10
System maintenance ................................................................................................................................................. 11
Inlet lter (between uid reservoir and charge pump) ............................................................................. 11
Changing the oil ...................................................................................................................................................... 11
Leak test ...................................................................................................................................................................... 11
Cleanliness ................................................................................................................................................................. 11
Checking of the oil level ....................................................................................................................................... 11
Recommended oils ................................................................................................................................................. 11
Trouble shooting ......................................................................................................................................................... 12
Transmission operates in one direction only ................................................................................................ 12
System response is sluggish ................................................................................................................................ 12
Neutral difcult or impossible to nd .............................................................................................................. 13
System will not operate in either direction ................................................................................................... 13
Inspection instructions ......................................................................................................................................... 14
Checking the charge pressure ............................................................................................................................. 14
Checking the charge pump .................................................................................................................................. 14
Checking the charge check valves ...................................................................................................................... 14
Checking the servo valve (control valve) ............................................................................................................ 15
Disassembly and assembly .................................................................................................................................... 16
Sectional view .......................................................................................................................................................... 16
Exploded view .......................................................................................................................................................... 17
Minor repairs ............................................................................................................................................................. 18
Preparation for assembly ...................................................................................................................................... 18
Mounting block ...................................................................................................................................................... 18
Changing the shaft seal disassembly .................................................................................................................. 19
Changing the shaft seal assembly ....................................................................................................................... 20
Changing the charge pump and the charge check valves .............................................................................. 21
Changing the servo valve (control valve) ........................................................................................................... 23
Major repairs ............................................................................................................................................................. 24
Changing the valve and bearing plate disassembly ......................................................................................... 24
Changing the valve and bearing plate assembly .............................................................................................. 25
Changing the cylinder block kit disassembly .................................................................................................... 27
Changing the cylinder block kit assembly ......................................................................................................... 28
Changing the swash plate and servo piston disassembly ............................................................................... 29
Changing the swash plate and servo piston assembly .................................................................................... 31
Changing the pump shaft ..................................................................................................................................... 33
Installation torque values ....................................................................................................................................... 35
Series 20 Axial Piston Pumps_SR.indd 24.4.2002, 14:022-3