Toro Groundsmaster
3500-D - Traction Drive Adjustment; Adjusting Traction Drive for Neutral

Rev. F
Groundsmaster 3500--D Hydraulic System (Rev. D)Page 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3.....................
Hydraulic Hoses 3.............................
Hydraulic Fitting Installation 3...................
Towing Tr action Unit 5..........................
Hydraulic System Fluid 6.......................
Check Hydraulic System Fluid 7.................
Relieving Hydraulic System Pressure 7...........
Traction Circuit (Closed Loop) Component Failure 8
HYDRAULIC SCHEMATIC 9.....................
HYDRAULIC FLOW DIAGRAMS 10...............
Traction Circuits 10............................
Cutting Unit Circuit 12..........................
Lift Circuit (Up) 14.............................
Lift Circuit (Down) 16...........................
Sidewinder Circuit 18...........................
Steering Circuit 20.............................
SPECIAL TOOLS 22............................
TROUBLESHOOTING 26........................
TESTING 28...................................
Traction Circuit Working Pressure Test 30.........
Piston Pump (P3) Flow & Traction Relief
Pressure Test 32...........................
Charge Relief Valve Pressure Test 34............
Gear Pump (P2) Flow Test 36...................
Wheel Motor Efficiency Test 38..................
Cutting Deck Circuit Pressure Test 40............
Gear Pump (P1) Flow Test 42...................
Manifold Relief Valve (R1) Pressure Test 44.......
Logic (Counterbalance) Valve (LC1)
Pressure Test 46.............................
Deck Motor Efficiency -- Case Drain Test 48.......
Lift and Steering C ontrol Valve Relief
Pressure Test 50.............................
Steering Control Valve Test 52...................
ADJUSTMENTS 54.............................
Adjust Traction Drive for Neutral 54..............
Braking Valve Adjustment 55....................
SERVICE AND REPAIRS 56.....................
General Precautions for Removing and
Installing Hydraulic System Components 56....
Change Hydraulic Fluid 57......................
Replace Hydraulic Oil Filter 58..................
Replace Traction Belt 59........................
Check Hydraulic Lines and Hoses 59.............
Flush Hydraulic System 60......................
Charge Hydraulic System 61....................
Hydraulic Tank and Hydraulic Oil Filter 62.........
Oil Cooler 64..................................
Front Wheel Motors 66.........................
Rear Wheel Motor 68..........................
Wheel Motor Service 70........................
Rotary Cutting Motors 72.......................
Rotary Cutting Motor Service (Haldex) 72.........
Rotary Cutting Motor Service (Casappa) 78.......
Hydraulic Manifold 80..........................
Hydraulic Manifold Service (Serial Numbers
Below 240000600) 82.........................
Hydraulic Manifold Service (Serial Numbers
Above 240000600) 86........................
Control Valve 88...............................
Control Valve Service 90........................
Piston Pump 94...............................
Piston Pump Service 98........................
Gear Pump 100...............................
Gear Pump Service (Serial Numbers
Below 260000400) 102........................
Gear Pump Service (Serial Numbers
Above 260000400) 105.1.....................
Steering Control Valve 106......................
Steering Control Valve Service (Serial Numbers
Below 240000000) 108........................
Steering Control Valve Service (Serial Numbers
Above 240000000) 109.......................
Sidewinder 110................................
Front Lift Cylinder 112..........................
Rear Lift Cylinder 114..........................
Lift Cylinder Service 116........................
Steering Cylinder 118..........................
Steering Cylinder Service 120...................
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
ROSS HYDRAGUIDE
TM
HYDROSTATIC STEERING
SYSTEM HGF SERIES SERVICE PROCEDURE
SAUER/DANFOSS STEERING UNIT TYPE OSPM
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