Toro Reelmaster 3100-D Service Manual page 77

Table of Contents
General Information .............................................................................................................................. 5-3
Operator's Manual ............................................................................................................................. 5-3
Relieving Hydraulic System Pressure ................................................................................................ 5-3
Traction Circuit (Closed Loop) Component Failure............................................................................. 5-3
Hydraulic Hoses................................................................................................................................. 5-5
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal Fittings) ..................................................... 5-6
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fittings)............................................... 5-8
Hydraulic Schematic............................................................................................................................ 5-11
Hydraulic Flow Diagrams..................................................................................................................... 5-14
Traction Circuits ............................................................................................................................... 5-15
Reel Circuit ...................................................................................................................................... 5-17
Lift Circuit (Up) ................................................................................................................................. 5-19
Lift Circuit (Down) ............................................................................................................................ 5-21
Sidewinder Circuit ............................................................................................................................ 5-23
Steering Circuit ................................................................................................................................ 5-25
Testing ................................................................................................................................................. 5-27
Before Performing Hydraulic Tests................................................................................................... 5-27
Precautions for Hydraulic Testing..................................................................................................... 5-27
Traction Circuit Testing − Charge Pressure Test............................................................................... 5-29
Traction Unit Testing − Wheel Motor Efficiency Tests ....................................................................... 5-32
Traction Circuit Testing − Piston Pump/Hydrostat (P3) Flow and Relief Pressure
Test .................................................................................................................................................. 5-37
Reel Circuit Testing − Pressure Test................................................................................................. 5-40
Reel Circuit Testing − Reel Motor Efficiency/Case Drain Test ........................................................... 5-43
Reel Motor Cross−over Relief Pressures Test (Using Pressure Gauge) ........................................... 5-46
Reel Circuit Testing − Manifold Relief Valve (SV) Pressure Test ....................................................... 5-49
Reel Circuit Testing − Gear Pump (P1) Flow Test ............................................................................. 5-52
Steering/Lift/Sidewinder Circuit Testing − Gear Pump (P2) Flow Test............................................... 5-55
Steering/Lift/Sidewinder Circuit Testing − Relief Valve Pressure Test ............................................... 5-58
Steering/Lift/Sidewinder Circuit Testing − Steering Control Valve and Steering Cylinder
Test .................................................................................................................................................. 5-60
Service and Repairs ........................................................................................................................... 5-62
General Precautions for Removing and Installing Hydraulic System Components ........................... 5-62
Check Hydraulic Lines and Hoses ................................................................................................... 5-63
Priming Hydraulic Pumps................................................................................................................. 5-64
Flush Hydraulic System ................................................................................................................... 5-65
Filtering Closed−Loop Traction Circuit ............................................................................................. 5-67
Charge Hydraulic System ................................................................................................................ 5-69
Hydraulic Tank and Hydraulic Fluid Filter ......................................................................................... 5-71
Radiator and Oil Cooler Assembly ................................................................................................... 5-73
Hydraulic Pump Assembly ............................................................................................................... 5-74
Piston Pump/Hydrostat .................................................................................................................... 5-79
Piston Pump/Hydrostat Service ....................................................................................................... 5-84
Gear Pump....................................................................................................................................... 5-88
Servicing the Gear Pump ................................................................................................................. 5-91
Front Wheel Motors ......................................................................................................................... 5-96
Rear Wheel Motor ............................................................................................................................ 5-98
Servicing the Wheel Motor ............................................................................................................. 5-101
Reelmaster ® 3100-D/3105-D
20252SL Rev A
Hydraulic System
Page 5-1
Chapter 5
Hydraulic System