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Groundsmaster 5900/5910 Hydraulic SystemPage 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3.....................
Traction Unit Operator’s Manual 3...............
Check Hydraulic Fluid 3.......................
Relieving Hydraulic System Pressure 3..........
Towing Traction Unit 4.........................
Traction Circuit Component Failure 5............
Hydraulic Hoses 6............................
Hydraulic Hose and Tube Installation (O--Ring Face
Seal Fitting) 7...............................
Hydraulic Fitting Installation (SAE Straight Thread
O--Ring Fitting into Component Port) 8.........
HYDRAULIC SCHEMATIC 11....................
HYDRAULIC FLOW DIAGRAMS 12...............
Traction Circuit: Low Speed 12..................
Traction Circuit: High Speed 14.................
Traction Circuit: Traction Control 16.............
Raise Cutting Deck 18.........................
Lower Cutting Deck 20........................
PTO Mow Circuit 22...........................
PTO Mow Circuit Cutting Deck Blade Braking 24..
Steering Circuit 26............................
Engine Cooling Fan Circuit 28..................
SPECIAL TOOLS 30............................
TROUBLESHOOTING 33........................
TESTING 38...................................
Traction Circuit Charge Pressure Test 40.........
Traction Circuit Relief Pressure Test 42..........
Rear Traction Circuit (RV) Relief Pressure Test 44.
Traction Circuit Reducing Valve (PR)
Pressure Test 46............................
Counterbalance Pressure Test 48...............
Cutting Deck Circuit Pressure Test 50............
Lift/Lower Circuit Relief Pressure Test 52.........
Steering Circuit Relief Pressure Test 54..........
Steering Cylinder Internal Leakage Test 56.......
Gear Pump (P3) Flow Test 58..................
ADJUSTMENTS 60.............................
Adjustable Pressure 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 64...................
Hydraulic Reservoir 66........................
Gear Pump 68................................
Gear Pump Service 70.........................
Traction Circuit 72.............................
Piston (Traction) Pump 74......................
Piston (Traction) Pump Service 76..............
Front Wheel Motors 78........................
Front Wheel Motor Service 80
..................
Rear
Wheel Motors 82.........................
Rear Wheel
Motor Service 84...................
Traction Control Manifold 86....................
Traction Control Manifold Service 88.............
4WD Control Manifold 90......................
4WD Control Manifold Service 92...............
Traction Flush Manifold 94.....................
PTO Circuit 96................................
Cutting Deck Motor 98.........................
Cutting Deck Motor Service 100.................
PTO Control Manifolds 104.....................
PTO Control Manifold Service 108...............
Filter Manifold 110............................
Hydraulic Oil Cooler 112.......................
Cutting Deck Raise/Lower Circuit 114............
Front Deck Lift Cylinder 116....................
Front Deck Lift Cylinder Service 118.............
Wing Deck Lift Cylinder 120....................
Wing Deck Lift Cylinder Service 122.............
Lift Control Manifold 124.......................
Lift Control Manifold Service 126................
Steering and Engine Cooling Fan Circuit 128.....
Steering Control Valve 130.....................
Steering Control Valve Service 132..............
Steering Cylinders 134.........................
Steering Cylinder Service 136..................
Engine Cooling Fan Motor 138..................
Engine Cooling Fan Motor Service 140...........
Steering/Engine Cooling Fan Control Manifold 142
Steering/Engine Cooling Fan Control Manifold
Service 144.................................
SAUER DANFOSS D SERIES GEAR PUMP SEAL KIT
SERVICE INSTRUCTION BULLETIN
REXROTH VARIABLE PUMP A10VG REPAIR IN-
STRUCTIONS
REXROTH VARIABLE PUMP A10VG REPAIR MANU-
AL
EATON REPAIR INFORMATION: MODEL 74318 and
74348 PISTON MOTORS
PARKER TORQMOTOR
TM
SERVICE PROCEDURE
(TC, TB, TE, TJ, TF, TG, TH AND TL SERIES)
EATON PARTS AND REPAIR INFORMATION: 5
SERIES STEERING CONTROL UNITS
Hydraulic
System