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Groundsmaster 4000--D/4010--D Hydraulic SystemPage 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 3............................
GENERAL INFORMATION 4.....................
Operator ’s Manual 4..........................
Check Hydraulic Fluid 4.......................
Relieving Hydraulic System Pressure 4..........
Towing Traction Unit 5.........................
Traction Circuit Component Failure 5............
Hydraulic Hoses 6............................
Hydraulic Hose and Tube Installation 7..........
Hydraulic Fitting Installation 8..................
HYDRAULIC SCHEMATIC 10....................
HYDRAULIC FLOW DIAGRAMS 12...............
Traction Circuit: LOW Speed (Mow) 12..........
Traction Circuit: HI Speed (Transport) 14.........
Lower Cutting Deck Circuit 16..................
Raise Cutting Deck Circuit 18..................
Mow Circuit 20...............................
Mow Circuit Cutting Deck Blade Braking 22......
Steering Circuit 24............................
Engine Cooling Fan Circuit 26..................
SPECIAL TOOLS 28............................
TROUBLESHOOTING 33........................
TESTING 40...................................
Traction Circuit Charge Pressure 42.............
Traction Circuit Relief Pressure 44..............
Counterbalance Pressure 46...................
Reverse Traction Circuit Reducing Valve (PR)
Pressure 48................................
Rear Traction Circuit Relief Valve (RV) Pressure 50
Piston (Traction) Pump Flow 52.................
Cutting Deck Circuit Pressure 54................
PTO Relief Pressure 56........................
Cutting Deck Motor Case Drain Leakage 58......
Lift/Lower Circuit Relief Pressure 60.............
Steering Circuit Relief Pressure 62..............
Steering Cylinder Internal Leakage 64...........
Engine Cooling Fan Circuit 66..................
Gear Pump Flow 68...........................
ADJUSTMENTS 70.............................
Adjust Control Manifold Relief Valves 70.........
SERVICE AND REPAIRS 71.....................
General Precautions for Removing and
Installing Hydraulic System Components 71....
Check Hydraulic Lines and Hoses 72............
Priming Hydraulic Pumps 72...................
Flush Hydraulic System 73.....................
Filtering Closed--Loop Traction Circuit 74........
Charge Hydraulic System 75...................
Hydraulic Reservoir 76........................
Radiator and Oil Cooler Assembly 78............
Gear Pump 80................................
Gear Pump Service 84........................
Piston (Traction) Pump 86.....................
Piston (Traction) Pump Service 90..............
Rear Axle Motor 92...........................
Front Wheel Motors 94........................
Rear Axle and Front Wheel Motor Service 96.....
Rear Traction Manifold 98......................
Rear Traction Manifold Service 100.............
Front Traction Manifold 102....................
Front Traction Manifold Service 104.............
Combination Manifold 106.....................
Combination Manifold Service 108..............
Control Manifold Cartridge Valve Service 110.....
Steering Control Valve 112.....................
Steering Control Valve Service 114..............
Steering Cylinder 116.........................
Steering Cylinder Service 118..................
Engine Cooling Fan Motor 120..................
Engine Cooling Fan Motor Service 124..........
Cutting Dec k Motors 127.......................
Cutting Deck Motor Service (Sauer--Danfoss) 128.
Cutting Deck Motor Service (Casappa) 132.......
PTO Manifold 134.............................
PTO Manifold Service 136.....................
Side Deck Lift Cylinders 138....................
Center Deck Lift Cylinders 140..................
Lift Cylinder Service 142.......................
SAUER--DANFOSS H1 CLOSED CIRCUIT AXIAL PIS-
TON PUMPS SERVICE MANUAL
SAUER--DANFOSS K and L FRAME VARIABLE MO-
TORS SERVICE MANUAL
EATON PARTS AND REPAIR INFORMATION: 5
SERIES STEERING CONTROL UNITS
Hydraulic
System