Toro Groundsmaster 300 Series Service Manual page 97

Table of Contents
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Hydraulic Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . 3
Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hydraulic Fitting Installation . . . . . . . . . . . . . . . . 3
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
HYDRAULIC SCHEMATICS . . . . . . . . . . . . . . . . . . 6
HYDRAULIC FLOW DIAGRAMS . . . . . . . . . . . . . . . 7
Forward Traction Operation . . . . . . . . . . . . . . . . . 7
Raising the Cutting Unit . . . . . . . . . . . . . . . . . . . 8
Turning Steering Wheel to Right . . . . . . . . . . . . . 9
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . 10
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 12
TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Test No. 1: Charge Pressure . . . . . . . . . . . . . . . 19
Test No. 2: Implement Relief Pressure . . . . . . . 20
Test No. 3: Traction Pressure . . . . . . . . . . . . . . 21
Test No. 4: Charge Pump Flow and
Implement Relief Pressure . . . . . . . . . . . . . . 22
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Traction Control Rod Adjustment . . . . . . . . . . . 23
Traction Pedal Friction Wheel Adjustment . . . . 23
Traction Control Neutral Adjustment . . . . . . . . . 24
Lift Lever Latch Adjustment . . . . . . . . . . . . . . . . 25
®
Groundsmaster 300 Series
Hydraulic System
REPAIRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Transmission Trunnion Seal Replacement . . . . 26
Transmission By-Pass Valve . . . . . . . . . . . . . . . 27
Transmission Acceleration Valves . . . . . . . . . . . 28
Transmission Implement Relief Valve . . . . . . . . 29
Transmission Charge Relief Valve . . . . . . . . . . . 30
Transmission Charge Pump . . . . . . . . . . . . . . . 31
Transmission Removal and Installation . . . . . . . 33
Transmission Overhaul . . . . . . . . . . . . . . . . . . . 34
Separating Transmission Into Sections . . . . . . . 34
Transmission Pump Section . . . . . . . . . . . . . . . 35
Transmission Center Section . . . . . . . . . . . . . . 37
Transmission Motor Section . . . . . . . . . . . . . . . 38
Assembling Transmission Sections . . . . . . . . . . 39
Priming After Transmission Overhaul
or Replacement . . . . . . . . . . . . . . . . . . . . . . . 40
Lift Cylinder Removal and Installation . . . . . . . . 41
Lift Cylinder Repair . . . . . . . . . . . . . . . . . . . . . . 42
Lift Valve Removal and Installation . . . . . . . . . . 43
Lift Valve Repair . . . . . . . . . . . . . . . . . . . . . . . . 44
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Chapter 5
Table of Contents