Toro Field Pro 6040 Service Manual page 67

Table of Contents
General Information .............................................................................................................................. 5-3
Operator's Manual ............................................................................................................................. 5-3
Relieving Pressure from the Hydraulic System .................................................................................. 5-3
Towing or Moving the Machine By Hand ............................................................................................ 5-4
Traction Circuit Component Failure.................................................................................................... 5-6
Hydraulic Hoses................................................................................................................................. 5-7
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal Fitting)....................................................... 5-8
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fittings)............................................. 5-10
Hydraulic Schematics .......................................................................................................................... 5-13
Hydraulic Flow Diagrams..................................................................................................................... 5-14
Traction Circuit ................................................................................................................................. 5-14
Lift and Tilt Angle Circuits................................................................................................................. 5-17
Testing the Hydraulic System .............................................................................................................. 5-19
Hydraulic Test Selection................................................................................................................... 5-21
Testing the Traction Circuit - Charge Pressure ................................................................................ 5-22
Testing the Traction Circuit - Wheel Motor Efficiency ....................................................................... 5-26
Testing the Traction Circuit - Piston (traction) Pump Flow and Relief Pressure................................. 5-30
Testing the Lift and Tilt Angle Circuits - Gear Pump Flow ................................................................. 5-35
Testing the Lift and Tilt Angle Circuits - Relief Valve (RV1) Pressure................................................ 5-38
Adjustments ........................................................................................................................................ 5-40
Hydraulic Pump Drive Belt Tension .................................................................................................. 5-40
Adjusting the Traction Speed ........................................................................................................... 5-41
Service and Repairs ........................................................................................................................... 5-46
General Precautions for Removing and Installing the Hydraulic System Components...................... 5-46
Checking the Hydraulic Lines and Hoses ......................................................................................... 5-48
Flushing the Hydraulic System......................................................................................................... 5-49
Filtering the Closed-loop Traction Circuit ......................................................................................... 5-51
Priming the Hydraulic System .......................................................................................................... 5-54
Charging the Hydraulic System........................................................................................................ 5-55
Hydraulic Reservoir.......................................................................................................................... 5-57
Hydraulic Fluid Cooler...................................................................................................................... 5-59
Piston (Traction) Pumps................................................................................................................... 5-61
Servicing the Piston (Traction) Pumps ............................................................................................. 5-64
Gear Pump....................................................................................................................................... 5-65
Servicing the Gear Pump ................................................................................................................. 5-67
Wheel Motors................................................................................................................................... 5-71
Servicing the Wheel Motor ............................................................................................................... 5-73
Control Valve.................................................................................................................................... 5-75
Servicing the Control Valve .............................................................................................................. 5-77
Center Lift Cylinder .......................................................................................................................... 5-79
Servicing the Center Lift Cylinder..................................................................................................... 5-81
Rear Lift Cylinder ............................................................................................................................. 5-84
Servicing the Rear Lift Cylinder........................................................................................................ 5-86
Angle Cylinder (Optional) ................................................................................................................. 5-89
Servicing the Optional Angle Cylinder .............................................................................................. 5-91
Laser Level Control Manifold (Optional) ........................................................................................... 5-94
Servicing the Laser Level Control Manifold (Optional)...................................................................... 5-96
Servicing the Cartridge Valves ......................................................................................................... 5-97
Field Pro® 6040
22267SL Rev A
Hydraulic System
Page 5-1
Chapter 5
Hydraulic System