Service manual

Rev. A
Groundsmaster 3280--D/3320 Hydraulic SystemPage 5 -- 1
Chapter 5
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3.....................
Hydraulic Hoses 3............................
Hydraulic Fitting Installation 3...................
Towing Traction Unit 5.........................
Check Hydraulic Fluid 5.......................
HYDRAULIC SCHEMATICS 6....................
HYDRAULIC FLOW DIAGRAMS 8................
Traction Circuit 8..............................
Lift Circuit 10.................................
Steering Circuit 12............................
SPECIAL TOOLS 14............................
Hydraulic Pressure Test Kit 14..................
Hydraulic Tester (Pressure and Flow) 14.........
Hydraulic Test Fitting Kit 15.....................
O--Ring Kit 15................................
TROUBLESHOOTING 16........................
TESTING 19...................................
Charge Pressure Test 20.......................
Implement Relief Pressure Test 21..............
Lift Cylinder Internal Leakage Test 22............
Steering Cylinder Internal Leakage Test 24.......
Charge Pump Flow Test 26.....................
ADJUSTMENTS 27.............................
Traction Pedal Friction Wheel 27................
SERVICE AND REPAIRS 28.....................
General Precautions for Removing and Installing
Hydraulic System Components 28.............
Check Hydraulic Lines and Hoses 28............
Flush Hydraulic System 29.....................
Hydraulic System Start--up 30..................
Transmission Drive Shaft 32....................
Hydrostatic Transmission 34....................
Hydrostatic Transmission Service 38............
Hydrostatic Transmission Neutral Arm
Assembly 39................................
Lift Cylinder 40...............................
Steering Control Valve 42......................
Steering Control Valve Service 44...............
Steering Cylinder (2 Wheel Drive) 46............
Steering Cylinder Service (2 Wheel Drive) 48.....
Steering Cylinder (4 Wheel Drive) 50............
Steering Cylinder Service (4 Wheel Drive) 52.....
Lift Control Valve 54...........................
Lift Control Valve Service 56....................
Counterbalance Valve Manifold (If Equipped) 58..
Oil Cooler (Groundsmaster 3280--D) 60..........
SAUER--DANFOSS (SUNDSTRAND) 15 SERIES RE-
PAIR MANUAL
SAUER--DANFOSS (SUNDSTRAND) 15 SERIES
SERVICE MANUAL
SAUER--DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System