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Rev. A
Reelmaster 7000 Hydraulic SystemPage 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 3............................
GENERAL INFORMATION 4.....................
Operator ’s Manual 4..........................
Towing Traction Unit 4.........................
Check Hydraulic Fluid 4.......................
Relieving Hydraulic System Pressure 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: Mow Speed (4WD) 12..........
Traction Circuit: Transport Speed (2WD) 14......
Lower Cutting Units 16........................
Raise Cutting Units 18.........................
Mow Circuit 20...............................
Steering Circuit 22............................
Engine Cooling Fan Circuit 24..................
SPECIAL TOOLS 26............................
TROUBLESHOOTING 30........................
TESTING 36...................................
Traction Circuit Charge Pressure Test 38.........
Traction Circuit Relief Pressure Test 40..........
Traction Circuit Reducing Valve (PR)
Pressure Test 42............................
Rear Traction Circuit Relief (RV) Pressure Test 44
Piston (Traction) Pump Flow Test 46............
Mow Circuit Pressure Test 48...................
Mow Circuit Relief Pressure Test 50.............
Cutting Unit Motor Case Drain Leakage Test 52...
Gear Pump P1 and P2 Flow (Mow Circuits) Test 54
Steering Circuit Relief Pressure Test 56..........
Steering Cylinder Internal Leakage 58...........
Lift/Lower Circuit Relief Pressure Test 60........
Gear Pump P3 Flow (Steering and Lift/Lower
Circuits) Test 62.............................
Cooling Fan Circuit Test 64.....................
Gear Pump P4 Flow (Cooling Fan Circuit) Test 66.
ADJUSTMENTS 68.............................
Adjust Control Manifold Relief Valves 68.........
SERVICE AND REPAIRS 69.....................
General Precautions for Removing and
Installing Hydraulic System Components 69....
Check Hydraulic Lines and Hoses 70............
Flush Hydraulic System 71.....................
Filtering Closed--Loop Traction Circuit 72........
Charge Hydraulic System 73...................
Gear Pump 74................................
Gear Pump Service 76........................
Piston (Traction) Pump 78.....................
Piston (Traction) Pump Service 80..............
4WD/2WD and Filtration/Charge Control
Manifolds 82.....
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....................
4WD/2WD Control Manifold Service 84..........
Filtration/Charge Control Manifold Service 86.....
Control Manifold Cartridge Valve Service 87......
Rear Axle Motor 88...........................
Front Wheel Motors 90........................
Rear Axle and Front Wheel Motor Service 92.....
Cutting Reel Motor 93.........................
Cutting Reel Motor Service 94..................
Mow Control Manifold 98......................
Mow Control Manifold Service 100..............
Steering Control Valve 102.....................
Steering Control Valve Service 104..............
Steering Cylinder 106.........................
Steering Cylinder Service 108..................
Engine Cooling Fan Motor 110..................
Engine Cooling Fan Motor Service 112..........
Fan Control Manifold 114......................
Fan Control Manifold Service 116...............
Lift Control Manifold 118.......................
Lift Control Manifold Service 120................
Lift Circuit Junction Manifold 122................
Front Lift Cylinders 124........................
Rear Lift Cylinders 126........................
Lift Cylinder Service 128.......................
Hydraulic Reservoir 130.......................
Hydraulic Oil Cooler 132.......................
EATON MODEL 72400 SERVO CONTROLLED PIS-
TON PUMP REPAIR INFORMATION
EATON MODEL 74318 and 74348 PISTON MOTORS:
FIXED DISPLACEMENT, VALVE PLATE DESIGN
REPAIR INFORMATION
SAUER--DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System