Table Of Contents - Sauer Danfoss 51 Series Service Manual

Bent Axis Variable Displacement Motors
Contents
Introduction ......................................................................................................................................................4
Basic Hydraulic Circuits ...................................................................................................................................4
General Description of the Series 51 Variable Displacement Motors ..............................................................5
Functional Description ......................................................................................................................................6
Technical Specifications and Data - Variable Displacement Motors .............................................................. 20
Safety Precautions .........................................................................................................................................21
Gauge Installation ..........................................................................................................................................23
Start-Up Procedure and Maintenance ............................................................................................................25
Component Inspection and Adjustment .........................................................................................................27
Troubleshooting ............................................................................................................................................. 37
Exploded View of the Series 51 Variable Motor .............................................................................................41
Minor Repair and Replacement - Variable Motor ........................................................................................... 51
General .....................................................................................................................................................51
Shaft Seal (SAE Flange Configuration) ....................................................................................................52
Shaft Seal (Cartridge Configuration) .........................................................................................................53
Loop Flushing Shuttle Valve (Option)........................................................................................................54
Charge Pressure Relief Valve ...................................................................................................................55
Minimum Angle Servo Cover .................................................................................................................... 55
Hydraulic 2-Position Control (Type N2) .....................................................................................................56
Electrohydraulic 2-Position Controls (Types E1•E2 and F1•F2) ...............................................................57
Electric 2-Position Controls (Type S1) ......................................................................................................58
Hydraulic Proportional Control (Type HZ) .................................................................................................59
Hydraulic Proportional Control (Type HS) .................................................................................................60
Hydraulic Proportional Control with Maximum Angle Over-ride (Types H1•H2 or K1•K2) ........................61
Two Connection Hydraulic Proportional Control (Type HP) ......................................................................62
Two Connection Hydraulic Proportional Control for "Dual Path" Vehicles (Type HC) ...............................64
Electrohydraulic Proportional Control (Types EP and EQ)........................................................................68
Pressure Control Pilot (PCP) Valve for Electrohydraulic Proportional Control (Types EP and EQ) .......... 70
Multi-function Block ...................................................................................................................................71
Pressure Compensator Regulator (Type PC) ........................................................................................... 76
Control Orifices .........................................................................................................................................77
Plug / Fitting Torques ................................................................................................................................77
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Series 51
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