Toro Groundsmaster 360 Service Manual page 59

Table of Contents
Specifications ....................................................................................................................................... 4-3
Hydraulic System ............................................................................................................................... 4-3
General Information .............................................................................................................................. 4-4
Pushing the Traction Unit ................................................................................................................... 4-4
Releasing Pressure from the Hydraulic System ................................................................................. 4-5
Traction Circuit Component Failure.................................................................................................... 4-6
Hydraulic Hoses................................................................................................................................. 4-7
Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting)..................................................... 4-8
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fitting into the Component
Port) ................................................................................................................................................... 4-9
Hydraulic Schematics .......................................................................................................................... 4-13
Hydraulic Flow Diagrams..................................................................................................................... 4-14
Traction Circuits ............................................................................................................................... 4-15
Steering Circuit ................................................................................................................................ 4-19
Lift/Lower Circuit: Raise................................................................................................................... 4-22
Lift/Lower Circuit: Lower .................................................................................................................. 4-24
PTO Circuit ...................................................................................................................................... 4-26
Special Tools ....................................................................................................................................... 4-27
Hydraulic Pressure Testing Kit ......................................................................................................... 4-27
15 GPM Hydraulic Tester Kit (Pressure and Flow)............................................................................ 4-27
40 GPM Hydraulic Tester (Pressure and Flow)................................................................................. 4-28
Hydraulic Hose Kit ........................................................................................................................... 4-29
O-Ring Kit ........................................................................................................................................ 4-29
High Flow Hydraulic Filter Kit ........................................................................................................... 4-30
Hydraulic Test Fitting Kit................................................................................................................... 4-30
Wheel Hub Puller ............................................................................................................................. 4-31
Remote Starter Switch ..................................................................................................................... 4-31
Troubleshooting................................................................................................................................... 4-34
General Hydraulic System Problems ............................................................................................... 4-34
Traction Circuit Problems ................................................................................................................. 4-35
PTO Circuit Problems ...................................................................................................................... 4-37
Steering and Lift/Lower Circuit Problems ......................................................................................... 4-38
Testing the Hydraulic System .............................................................................................................. 4-39
Testing the Traction System Operation ............................................................................................ 4-40
Testing the Charge Relief Valve Pressure (Using Pressure Gauge).................................................. 4-42
Testing the Traction Relief Valve Pressure (Using Pressure Gauge) ................................................ 4-45
Testing the Transmission Piston Pump Flow (Using Tester with Pressure Gauges and Flow
Meter)............................................................................................................................................... 4-48
Testing the Rear Wheel Motor Efficiency (Using Tester with Pressure Gauges and Flow
Meter)............................................................................................................................................... 4-52
Testing the PTO Pressure Valve (Using Pressure Gauge)................................................................ 4-56
Testing the Implement Relief Pressure (Using Pressure Gauge) ...................................................... 4-59
Testing the Gear Pump Flow (Using Tester with Pressure Gauges and Flow
Meter)............................................................................................................................................... 4-62
Testing the Lift Cylinder for Internal Leakage.................................................................................... 4-65
Service and Repairs ........................................................................................................................... 4-68
General Precautions for Removing and Installing the Hydraulic System Components...................... 4-68
Checking the Hydraulic Lines and Hoses ......................................................................................... 4-69
Groundsmaster 360
16225SL Rev C
Hydraulic System
Page 4-1
Chapter 4
Hydraulic System