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Groundsmaster 4100--D Hydraulic SystemPage 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3.....................
Operator’s Manual 3..........................
Towing Tr action Unit 3.........................
Check Hydraulic Fluid 3.......................
Hydraulic Hoses 4............................
Hydraulic Hose and Tube Installation 5..........
Hydraulic Fitting Installation 6...................
HYDRAULIC SCHEMATIC 8.....................
HYDRAULIC FLOW DIAGRAMS 10...............
Traction Circuit: 4WD (Mow) 10.................
Traction Circuit: Transport (2WD) 12.............
Lower Cutting Deck 14........................
Raise Cutting Deck 16.........................
Mow Circuit 18...............................
Mow Circuit Cutting Deck Blade Braking 20.......
Steering Circuit 22............................
Engine Cooling Fan Circuit 24..................
SPECIAL TOOLS 26............................
TROUBLESHOOTING 28........................
TESTING 31...................................
Traction Circuit Charge Pressure 32.............
Traction Circuit Relief Pressure 34..............
Counterbalance Pressure 36...................
Rear Traction Circuit (RV) Relief Pressure 38.....
Traction Circuit Reducing Valve (PR)
Pressure 40................................
Cutting Deck Circuit Pressure 42................
PTO Relief Pressure 44........................
Cutting Deck Gear Pump Flow 46...............
Cutting Deck Motor Case Drain Leakage 48......
Steering Circuit Relief Pressure 50..............
Lift/Lower Circuit Relief Pressure 52.............
Steering and Lift/Lower Gear Pump Flow 54......
Engine Cooling Fan Circuit 56..................
Engine Cooling Fan Circuit Gear Pump Flow 58...
ADJUSTMENTS 60.............................
Adjust Cutting Deck Flow Control Valve 60.......
SERVICE AND REPAIRS 61.....................
General Precautions for Removing and
Installing Hydraulic System Components 61....
Check Hydraulic Lines and Hoses 61............
Flush Hydraulic System 62.....................
Charge Hydraulic System 63...................
Hydraulic Reservoir 64........................
Hydraulic Oil Cooler 66........................
Gear Pump 68................................
Gear Pump Service 70.........................
Traction Circuit 72.............................
Piston (Traction) Pump 74......................
Piston (Traction) Pump Servic e 76..............
Rear Axle Motor 78
...........................
Front
Wheel Motors 80........................
Rear Axle and Front Wheel Motor Service 82.....
4WD Manifold 84.............................
4WD Manifold Service 86......................
Filter Manifold 88.............................
Filter Manifold Service 90......................
Steering and Cooling Fan Circuits 92............
Steering Valve 94.............................
Steering Valve Service 96......................
Steering Cylinder 98...........................
Steering Cylinder Service 100..................
Engine Cooling Fan Motor 102..................
Engine Cooling Fan Motor Service 104...........
Fan Drive Manifold 108........................
Fan Drive Manifold Service 110.................
Mow Circuit 112..............................
Cutting Deck Motor 113........................
Cutting Deck Motor Service 114.................
Deck Manifolds 118...........................
Deck Manifold Service 120.....................
Lift/Lower Circuit 122..........................
Lift/Lower Control Valve 124....................
Lift/Lower Control Valve Service 126.............
Front Deck Lift Cylinder 128....................
Wing Deck Lift Cylinder 130....................
Deck Lift Cylinder Service 132..................
Counterbalance Manifold 134...................
Counterbalance Manifold Service 136............
EATON MODEL 72400 SERVO CONTROLLED PIS-
TON PUMP REPAIR INFORMATION
EATON MODEL 74318 and 74348 PISTON MOTORS:
FIXED DISPLACEMENT, VALVE PLATE DESIGN
REPAIR INFORMATION
Hydraulic
System