Workman HDX Auto Page 7 − 1 Hydraulic System
Chapter 7
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3......................
Operator’s Manual 3...........................
Check Hydraulic Oil 3..........................
Relieving Hydraulic System Pressure 3...........
Hydraulic Hoses 4.............................
Hydraulic Hose and Tube Installation 5...........
Hydraulic Fitting Installation 6...................
HYDRAULIC SCHEMATIC 8......................
HYDRAULIC CIRCUIT OPERATION 10.............
Steering Circuit 10.............................
Raise and Lower Bed 12........................
High Flow Hydraulic Circuit 13...................
SPECIAL TOOLS 14.............................
TROUBLESHOOTING 16.........................
TESTING 19....................................
Gear Pump Flow and System Relief Pressure 20..
Steering Control Valve and Steering Cylinder 22...
Lift Cylinder Internal Leakage 24.................
High Flow Hydraulics Gear Pump Flow and
System Relief Pressure 26....................
SERVICE AND REPAIRS 28......................
General Precautions for Removing and Installing
Hydraulic System Components 28..............
Check Hydraulic Lines and Hoses 29.............
Hydraulic Reservoir 30.........................
Gear Pump (Vehicles with Standard Hydraulics) 32.
Gear Pump Service (Vehicles with Standard
Hydraulics) 34...............................
Gear Pump (Vehicles with High Flow Hydraulics) 38
Gear Pump Service (Vehicles with High Flow
Hydraulics) 40...............................
Lift Valve 42...................................
Lift Valve Service 44............................
Steering Control Valve 46.......................
Steering Control Valve Service 48................
Steering Cylinder 50...........................
Steering Cylinder Service 52....................
Lift Cylinder 54................................
Lift Cylinder Service 56.........................
Hydraulic Manifold (Vehicles with High Flow
Hydraulics) 58...............................
DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System
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