Table Of Contents - Sauer Danfoss 20 Series Service Manual

CONTENTS
Series 20 - Axial Piston Motors
Service Manual and Repair Instructions
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 - fixed displac. Motor) .................................................... 9
System circuit description ....................................................................................................................................... 9
System maintenance ................................................................................................................................................. 10
Inlet filter (between fluid reservoir and charge pump) ............................................................................. 10
Changing the oil ...................................................................................................................................................... 10
Leak test ...................................................................................................................................................................... 10
Cleanliness ................................................................................................................................................................. 10
Checking of the oil level ....................................................................................................................................... 10
Recommended oils ................................................................................................................................................. 10
Trouble shooting ......................................................................................................................................................... 11
Transmission operates in one direction only ................................................................................................ 11
System response is sluggish ................................................................................................................................ 11
System operating hot ............................................................................................................................................ 12
System will not operate in either direction ................................................................................................... 12
Inspection instructions ......................................................................................................................................... 13
Checking the high pressure relief valve
Checking the shuttle valve
Mounting block ......................................................................................................................................................................... 14
Preparation for assembly ...................................................................................................................................... 14
Disassembly and assembly .................................................................................................................................... 15
Sectional view .......................................................................................................................................................... 15
Exploded view .......................................................................................................................................................... 16
Minor repairs ............................................................................................................................................................. 17
Changing the shaft seal disassembly
Changing the shaft seal assembly
Changing the valve manifold assembly
Repair the manifold valve assembly
Major repairs ............................................................................................................................................................. 22
Changing the valve and bearing plate disassembly
Changing the valve and bearing plate assembly
Changing the cylinder block kit, the swash plate and the motor shaft disassembly
Changing the cylinder block kit, the swash plate and the motor shaft assembly
Installation torque values ....................................................................................................................................... 27
DKMH.PS.330.C1.02 520L0534
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