Toro Groundsmaster 3280-D Service Manual page 85

Table of Contents
Specifications ....................................................................................................................................... 5-3
Groundsmaster 3280-D and 3320-G.................................................................................................. 5-3
General Information .............................................................................................................................. 5-4
Checking the Hydraulic Fluid ............................................................................................................. 5-4
Pushing or Towing the Traction Unit ................................................................................................... 5-5
Releasing Pressure from the Hydraulic System ................................................................................. 5-6
Traction Circuit Component Failure.................................................................................................... 5-7
Hydraulic Hoses................................................................................................................................. 5-8
Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting)..................................................... 5-9
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fitting into the Component
Port) ................................................................................................................................................. 5-11
Hydraulic Schematics .......................................................................................................................... 5-15
Hydraulic Flow Diagrams..................................................................................................................... 5-19
Traction Circuit (Machine Serial Number below 316000000)............................................................ 5-19
Traction Circuit (Machine Serial Number above 316000000) ........................................................... 5-24
Lift Circuit (Machine Serial Number below 311000000) .................................................................... 5-27
Lift Circuit (Machine Serial Number above 311000000).................................................................... 5-31
Steering Circuit (Machine Serial Number below 316000000) ........................................................... 5-35
Steering Circuit (Machine Serial Number above 316000000)........................................................... 5-37
Special Tools ....................................................................................................................................... 5-39
Hydraulic Pressure Testing Kit ......................................................................................................... 5-39
15 GPM Hydraulic Tester Kit (Pressure and Flow)............................................................................ 5-39
40 GPM Hydraulic Tester (Pressure and Flow)................................................................................. 5-40
Hydraulic Hose Kit ........................................................................................................................... 5-40
Hydraulic Test Fitting Kit................................................................................................................... 5-41
O-Ring Kit ........................................................................................................................................ 5-42
High Flow Hydraulic Filter Kit ........................................................................................................... 5-42
Remote Starter Switch ..................................................................................................................... 5-43
Troubleshooting................................................................................................................................... 5-44
General Hydraulic System Problems ............................................................................................... 5-44
Traction Circuit Problems ................................................................................................................. 5-45
Lift/Lower Circuit Problems .............................................................................................................. 5-46
Steering Circuit Problems ................................................................................................................ 5-46
Testing the Hydraulic System .............................................................................................................. 5-47
Charge Pressure Test (Using Pressure Gauge) (Machine Serial Numbers below
316000000)...................................................................................................................................... 5-49
Implement Relief Pressure Test (Using Pressure Gauge) (Machine Serial Numbers below
316000000)...................................................................................................................................... 5-51
Lift Cylinder Internal Leakage Test (Machine Serial Numbers below 316000000) ............................. 5-53
Steering Cylinder Internal Leakage Test (Machine Serial Numbers below 316000000) .................... 5-55
Charge Pump Flow Test (Using Tester With Pressure Gauges and Flow Meter) (Machine Serial
Numbers below 316000000) ............................................................................................................ 5-57
Testing the Traction Circuit-Charge Pressure (Machine Serial Numbers above
316000000)...................................................................................................................................... 5-59
Testing the Traction Circuit-Hydraulic Pump Flow and Relief Pressure (Machine Serial Numbers
above 316000000) ........................................................................................................................... 5-62
Testing the Steering Circuit-Steering Control Valve, Relief Valve Pressure, and Steering Cylinder
(Machine Serial Numbers above 316000000) .................................................................................. 5-66
Groundsmaster ® 3280-D/3320
05138SL Rev B
Hydraulic System
Page 5-1
Chapter 5
Hydraulic System