Reelmaster 3550−D/3555−D/3575−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 SCHEMATICS 14...................
HYDRAULIC FLOW DIAGRAMS 16...............
Traction Circuit 16............................
Cutting Unit Circuit 20.........................
Lift Circuit 22.................................
Steering Circuit 26............................
TROUBLESHOOTING 28........................
General Hydraulic System Problems 28..........
Traction Circuit Problems 29...................
Lift Circuit Problems 30........................
Steering Circuit Problems 31...................
Mow Circuit Problems 32......................
TESTING 33...................................
Traction Circuit Testing
Charge Pressure Test 36....................
Wheel Motor Efficiency Tests 38..............
Piston Pump/Hydrostat Flow and
Relief Pressure Test 42....................
Cutting Unit Circuit Testing
Pressure Test 46...........................
Reel Motor Efficiency/Case Drain Test 48......
Reel Motor Cross−Over Relief Pressure
Test (Reelmaster 3555−D/3575−D) 50.......
Proportional Relief Valve (PRV)
Pressure Test 52..........................
Mow Control Manifold Relief Valve (RV)
Pressure Test 54..........................
Gear Pump (P1) Flow Test 56................
Steering/Lift Circuit Testing
Gear Pump (P2) Flow Test 58................
Lift Valve Relief (RV1) Pressure Test
(Reelmaster 3555−D/3575−D) 60...........
Steering Relief Valve Pressure Test 62........
Steering Control Valve and
Steering Cylinder Test 64..................
ADJUSTMENTS 66.............................
Adjust Control Manifold Relief Valves 66.........
SERVICE AND REPAIRS 67.....................
General Precautions for Removing and
Installing Hydraulic System Components 67....
Check Hydraulic Lines and Hoses 68............
Priming Hydraulic Pumps 68...................
Flush Hydraulic System 69.....................
Filtering Closed−Loop Traction Circuit 70........
Charge Hydraulic System 71...................
Hydraulic Tank 72.............................
Radiator and Oil Cooler Assembly 74
............
Hydraulic Pump Assembly 76..................
Piston Pump/Hydrostat 80.....................
Piston Pump/Hydrostat Service 84..............
Gear Pump 87................................
Gear Pump Service 90........................
Front Wheel Motors 92........................
Rear Wheel Motor 94..........................
Wheel Motor Service 96.......................
Cutting Unit Reel Motor 98.....................
Cutting Unit Reel Motor Service
(Reelmaster 3550−D/3555−D) 100............
Cutting Unit Reel Motor Service
(Reelmaster 3575−D) 104....................
Mow Control Manifold 108.....................
Mow Control Manifold Service 110..............
Lift Control Manifold 114.......................
Lift Control Manifold Service
(Reelmaster 3550−D) 116....................
Lift Control Manifold Service
(Reelmaster 3555−D/3575−D) 118............
Control Manifold Cartridge Valve Service 120.....
Steering Control Valve 122.....................
Steering Control Valve Service 124..............
Steering Cylinder 126.........................
Steering Cylinder Service 128..................
Front Lift Cylinders 130........................
Rear Lift Cylinders 132........................
Lift Cylinder Service 134.......................
PARKER TORQMOTORt TC, TB, TE, TJ, TF, TG,
TH and TL SERIES SERVICE PROCEDURE
EATON MEDIUM DUTY PISTON PUMP REPAIR IN-
FORMATION MODEL 70160 VARIABLE DISPLACE-
MENT PISTON PUMP
DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System
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