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Workman HD Series Page 9 − 1 Hydraulic System
Chapter 9
Hydraulic System
Table of Contents
SPECIFICATIONS 3.............................
GENERAL INFORMATION 4......................
Operator’s Manual 4...........................
Hydraulic Hoses 4.............................
Hydraulic Hose and Tube Installation 5...........
Hydraulic Fitting Installation 6...................
SPECIAL TOOLS 8..............................
HYDRAULIC SCHEMATICS 10....................
Primary Hydraulic System Schematic 10..........
High Flow Hydraulic System Schematic 11........
HYDRAULIC CIRCUIT OPERATION 12.............
Steering Circuit 12.............................
Raise and Lower Bed 13........................
High Flow Hydraulic Circuit 14...................
TROUBLESHOOTING 15.........................
TESTING 18....................................
Primary Hydraulic System Gear Pump Flow Test
(Workman HDX and HDX−D) 20...............
Primary Hydraulic System Gear Pump Flow Test
(Workman HD) 24............................
Primary Hydraulic System Relief Valve
Pressure Test 28.............................
Steering Control Valve and Steering
Cylinder Test 30..............................
Lift Cylinder Internal Leakage Test 32.............
High Flow Hydraulics System
Gear Pump Flow and Relief Pressure Tests 34...
SERVICE and REPAIRS 37.......................
General Precautions for Removing and Installing
Hydraulic System Components 37..............
Check Hydraulic Lines and Hoses 37.............
Primary Hydraulic System Gear Pump
(Workman HDX and HDX−D) 38...............
Primary Hydraulic System Gear Pump
(Workman HD) 40............................
Primary Hydraulic System Gear Pump
Service 42..................................
High Flow hydraulic System Gear Pump
Service 46..................................
Lift Valve 48...................................
Lift Valve Service 50............................
Steering Control Valve 52.......................
Steering Control Valve Service 54................
Steering Cylinder 56...........................
Steering Cylinder Service 58....................
Lift Cylinder 60................................
Lift Cylinder Service 62.........................
Hydraulic Manifold (High Flow Hydraulics Kit) 64...
SAUER/DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System