Toro Sand Pro 3040 Service Manual page 71

Table of Contents
General Information .............................................................................................................................. 5-3
Traction Unit Operator's Manual and Accessory Installation Instructions............................................ 5-3
Relieving Pressure from the Hydraulic System .................................................................................. 5-3
Towing the Traction Unit..................................................................................................................... 5-4
Traction Circuit Component Failure.................................................................................................... 5-5
Hydraulic Hoses................................................................................................................................. 5-6
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal Fitting)....................................................... 5-7
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fittings)............................................... 5-9
Hydraulic Schematics .......................................................................................................................... 5-12
Hydraulic Flow Diagrams..................................................................................................................... 5-13
Traction Circuit ................................................................................................................................. 5-13
Steering Circuit (Model 08745) ........................................................................................................ 5-16
Lift Circuit ......................................................................................................................................... 5-19
Rear Remote Hydraulic Circuit (Optional) ........................................................................................ 5-21
Switch Kit Hydraulic Circuit (Optional).............................................................................................. 5-22
Testing the Hydraulic System .............................................................................................................. 5-23
Hydraulic Test Selection................................................................................................................... 5-26
Testing the Traction Circuit - Charge Pressure ................................................................................ 5-27
Testing the Traction Circuit - Wheel Motor Efficiency ....................................................................... 5-31
Testing the Traction Circuit - Traction Pump (P1) Flow and Relief Pressure ..................................... 5-36
Testing the Lift and Steering Circuit - Implement/Charge Pump (P2) Flow and Circuit
Relief................................................................................................................................................ 5-40
Testing the Steering Circuit (Model 08745 only) - Steering Cylinder Internal
Leakage ........................................................................................................................................... 5-44
Testing the Lift Circuit - Lift Cylinder Internal Leakage ..................................................................... 5-46
Testing the Optional Attachment Circuit - Attachment Pump (P3) Flow and Circuit
Relief................................................................................................................................................ 5-48
Adjustments ........................................................................................................................................ 5-51
Adjusting the Traction System for Neutral ........................................................................................ 5-52
Service and Repairs ........................................................................................................................... 5-54
General Precautions for Removing and Installing the Hydraulic System Components...................... 5-54
Checking the Hydraulic Lines and Hoses ......................................................................................... 5-56
Flushing the Hydraulic System......................................................................................................... 5-57
Filtering the Closed-loop Traction Circuit ......................................................................................... 5-59
Priming the Hydraulic Pumps ........................................................................................................... 5-63
Charging the Hydraulic System........................................................................................................ 5-64
Hydraulic Tank ................................................................................................................................. 5-66
Hydraulic Fluid Cooler...................................................................................................................... 5-68
Piston (traction) Pump...................................................................................................................... 5-70
Servicing the Piston (traction) Pump ................................................................................................ 5-74
Wheel Motors................................................................................................................................... 5-76
Servicing the Wheel Motors ............................................................................................................. 5-81
Traction Relief Manifold ................................................................................................................... 5-83
Rear Lift Relief Manifold (Model 08743) ........................................................................................... 5-85
Servicing a Hydraulic Cartridge Valve .............................................................................................. 5-87
Lift Control Valve .............................................................................................................................. 5-89
Servicing the Lift Control Valve ........................................................................................................ 5-92
Rear Lift Cylinder ............................................................................................................................. 5-94
Sand Pro ® 3040 and 5040
20251SL Rev A
Hydraulic System
Page 5-1
Chapter 5
Hydraulic System