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Reelmaster 3550- D Hydraulic SystemPage 4 - 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2............................
GENERAL INFORMATION 3.....................
Operator ’s Manual 3..........................
Relieving Hydraulic System Pressure 3..........
Traction Circuit Component Failure 3............
Hydraulic Hoses 4............................
Hydraulic Hose and Tube Installation 5..........
Hydraulic Fitting Installation 6..................
SPECIAL TOOLS 8.............................
HYDRAULIC SCHEMATIC 14....................
HYDRAULIC FLOW DIAGRAMS 16...............
Traction Circuit 16............................
Cutting Unit Circuit 18.........................
Lift Circuit: Lower 20..........................
Lift Circuit: Raise 22...........................
Steering Circuit 24............................
TROUBLESHOOTING 26........................
General Hydraulic System Problems 26..........
Traction Circuit Problems 27...................
Lift Circuit Problems 28........................
Steering Circuit Problems 29...................
Mow Circuit Problems 30......................
TESTING 31...................................
Traction Circuit Testing
Charge Pressure Test 34....................
Wheel Motor Efficiency Tests 36..............
Piston Pump/Hydrostat Flow and
Relief Pressure Test 40....................
Cutting Unit Circuit Testing
Pressure Test 44...........................
Reel Motor Efficiency/Case Drain Test 46......
Proportional Relief Valve (PRV)
Pressure Test 48..........................
Mow Control Manifold Relief Valve (RV)
Pressure Test 50..........................
Gear Pump (P1) Flow Test 52................
Steering/Lift Circuit Testing
Gear Pump (P2) Flow Test 54................
Relief Valve Pressure Test 58................
Steering Control Valve and
Steering Cylinder Test 60..................
ADJUSTMENTS 62.............................
Adjust Control Manifold Relief Valves 62.........
SERVICE AND REPAIRS 63.....................
General Precautions for Removing and
Installing Hydraulic System Components 63....
Check Hydraulic Lines and Hoses 64............
Priming Hydraulic Pumps 64...................
Flush Hydraulic System 65.....................
Filtering Closed- Loop Traction Circuit 66........
Charge Hydraulic System 67...................
Hydraulic Tank 68.............................
Radiator and Oil Cooler Assembly 70............
Hydraulic Pump Assembly 72..................
Piston Pump/Hydrostat 76.
....................
Piston Pump/ Hydrostat Service 80..............
Gear Pump 83................................
Gear Pump Service 86........................
Front Wheel Motors 88........................
Rear Wheel Motor 90..........................
Wheel Motor Service 92.......................
Cutting Unit Reel Motor 94.....................
Cutting Unit Reel Motor Service 96..............
Mow Control Manifold 100.....................
Mow Control Manifold Service 102..............
Lift Control Manifold 106.......................
Lift Control Manifold Service 108................
Control Manifold Cartridge Valve Service 110.....
Steering Control Valve 11 2.....................
Steering Control Valve Service 114..............
Steering Cylinder 116.........................
Steering Cylinder Service 118..................
Front Lift Cylinders 120........................
Rear Lift Cylinders 122........................
Lift Cylinder Service 124.......................
EATON MEDIUM DUTY PISTON PUMP REPAIR IN-
FORMATION MODEL 70160 VARIABLE DISPLACE-
MENT PISTON PUMP
PARKER TORQMOTORt TC, TB, TE, TJ, TF, TG,
TH and TL SERIES SERVICE PROCEDURE
SAUER/DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System