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Rev. B
Groundsmaster 3505--D Hydraulic SystemPage 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3.....................
Hydraulic Hoses 3.............................
Hydraulic Fitting Installation 3...................
Towing Traction Unit 5..........................
Relieving Hydraulic System Pressure 5...........
Traction Circuit (Closed Loop) Component Failure 6
HYDRAULIC SCHEMATIC 7.....................
HYDRAULIC FLOW DIAGRAMS 8................
Traction Circuits 8.............................
Cutting Unit Circuit 10..........................
Lift Circuit (Raise) 12...........................
Lift Circuit (Lower) 14..........................
Steering Circuit 16.............................
SPECIAL TOOLS 18............................
Hydraulic Pressure Test Kit 18...................
Hydraulic Tester (Pressure and Flow) 18..........
Hydraulic Test Fitting Kit 19.....................
Measuring Container 19........................
O--Ring Kit 20.................................
Wheel Hub Puller 20...........................
High Pressure Hydraulic Oil Filter 20.............
TROUBLESHOOTING 22........................
TESTING 25...................................
Traction Circuit Working Pressure Test 26.........
Charge Relief Valve Pressure Test 28............
Piston Pump (P3) Flow & Traction Relief
Pressure Test 30.............................
Wheel Motor Efficiency Test 32..................
Cutting Deck Circuit Pressure Test 34............
Manifold Relief Valve (R1) Pressure Test 36.......
Logic (Counterbalance) Valve (LC1)
Pressure Test 38.............................
Gear Pump (P1) Flow Test 40...................
Deck Motor Efficiency -- Case Drain Test 42.......
Steering and Lift Relief Pressure Test 44..........
Gear Pump (P2) Flow Test 46...................
Steering Control Valve Test 48...................
ADJUSTMENTS 50.............................
Braking Valve Adjustment 50....................
SERVICE AND REPAIRS 51.....................
General Precautions for Removing and
Installing Hydraulic System Components 51.....
Check Hydraulic Lines and Hoses 51.............
Flush Hydraulic System 52......................
Charge Hydraulic System 53....................
Hydraulic Tank 54..............................
Oil Cooler 56..................................
Wheel Motors 58..............................
Wheel Motor Service 60........................
Cutting Deck Motors 62.........................
Cutting Deck Motor Service 64..................
Hydraulic Manifold 68
..........................
Hydraulic Manifold Service 70...................
Lift Control Valve 72............................
Lift Control Valve Service 74....................
Neutral Arm Assembly 78.......................
Piston Pump 80...............................
Piston Pump Service 84........................
Gear Pump 86................................
Gear Pump Service (Serial Number Below
260000400) 88...............................
Gear Pump Service (Serial Number Above
260000400) 91.1.............................
Steering Control Valve 92.......................
Steering Control Valve Service 94................
Front Lift Cylinder 96...........................
Rear Lift Cylinder 98...........................
Lift Cylinder Service 100........................
Steering Cylinder 102..........................
Steering Cylinder Service 104...................
ROSS TORQMOTOR
TM
MG, MF, ME AND MJ SE-
RIES SERVICE PROCEDURE
EATON MEDIUM DUTY PISTON PUMP REPAIR IN-
FORMATION MODEL 70160 VARIABLE DISPLACE-
MENT PISTON PUMP
SAUER/DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System