Toro 03116SL Rev E Service Manual Groundsmaster 4100 D Preface Publication

Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
GENERAL INFORMATION  . . . . . . . . . . . . . . . . . . . . .  3
Hydraulic Hoses  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
Hydraulic Fitting Installation . . . . . . . . . . . . . . . . . . .  3
Towing Traction Unit . . . . . . . . . . . . . . . . . . . . . . . . .  5
Check Hydraulic Fluid  . . . . . . . . . . . . . . . . . . . . . . .  5
HYDRAULIC SCHEMATIC  . . . . . . . . . . . . . . . . . . . . .  7
HYDRAULIC FLOW DIAGRAMS  . . . . . . . . . . . . . . . .  8
Traction Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
Lower Cutting Deck  . . . . . . . . . . . . . . . . . . . . . . . . 10
Raise Cutting Deck . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mow Circuit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Steering Circuit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SPECIAL TOOLS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Hydraulic Pressure Test Kit  . . . . . . . . . . . . . . . . . . 18
Hydraulic Tester (Pressure and Flow)  . . . . . . . . . 18
Hydraulic Test Fitting Kit . . . . . . . . . . . . . . . . . . . . . 19
Measuring Container  . . . . . . . . . . . . . . . . . . . . . . . 19
TROUBLESHOOTING  . . . . . . . . . . . . . . . . . . . . . . . . 20
TESTING  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Test No. 1: Traction Circuit Charge Pressure . . . 24
Test No. 2: Traction Circuit Relief Pressure  . . . . 26
Test No. 3: Cutting Deck Circuit Pressure . . . . . . 28
Test No. 4: Cutting Deck Gear Pump Flow . . . . . 30
Test No. 5: Cutting Deck Manifold
Relief Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Test No. 6: Cutting Deck Motor Case
Drain Leakage  . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Test No. 7: Steering Circuit Relief Pressure  . . . . 36
Test No. 8: Lift/Lower Circuit Relief Pressure . . . 38
Test No. 9: Steering and Lift/Lower
Gear Pump Flow  . . . . . . . . . . . . . . . . . . . . . . . . . 40
Test No. 10: Counterbalance Pressure  . . . . . . . . 42
Test No. 11: Rear Traction Circuit (RV5)
Relief Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Test No. 12: Traction Circuit Reducing
SERVICE AND REPAIRS  . . . . . . . . . . . . . . . . . . . . . 49
General Precautions for Removing and
Installing Hydraulic System Components  . . . . 49
Check Hydraulic Lines and Hoses  . . . . . . . . . . . . 49
Flush Hydraulic System  . . . . . . . . . . . . . . . . . . . . . 50
Charge Hydraulic System  . . . . . . . . . . . . . . . . . . . 51
Gear Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Gear Pump Service . . . . . . . . . . . . . . . . . . . . . . . . . 54
Piston (Traction) Pump . . . . . . . . . . . . . . . . . . . . . . 58
Piston (Traction) Pump Service  . . . . . . . . . . . . . . 60
Piston Pump Control Assembly  . . . . . . . . . . . . . . 64
Hydraulic Control Manifold: 4 Wheel Drive . . . . . 66
Hydraulic Control Manifold Service:
4 Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Hydraulic Control Manifold: Deck Drive . . . . . . . . 70
Hydraulic Control Manifold Service: Deck Drive   72
Hydraulic Control Manifold: Cutting Deck
Lift/Lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Hydraulic Control Manifold Service: Cutting
Deck Lift/Lower  . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Hydraulic Control Manifold: Filter Manifold . . . . . 76
Hydraulic Control Manifold Service:
Filter Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Rear Axle Motor  . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Front Wheel Motors  . . . . . . . . . . . . . . . . . . . . . . . . 80
Rear Axle/Front Wheel Motor Service . . . . . . . . . 82
Cutting Deck Motor . . . . . . . . . . . . . . . . . . . . . . . . . 85
Cutting Deck Motor Service . . . . . . . . . . . . . . . . . . 86
Lift/Lower Control Valve . . . . . . . . . . . . . . . . . . . . . 90
Lift/Lower Control Valve Service . . . . . . . . . . . . . . 92
Steering Valve  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Steering Valve Service . . . . . . . . . . . . . . . . . . . . . . 96
Front Deck Lift Cylinder  . . . . . . . . . . . . . . . . . . . . . 98
Front Deck Lift Cylinder Service . . . . . . . . . . . . . 100
Wing Deck Lift Cylinder  . . . . . . . . . . . . . . . . . . . . 102
Wing Deck Lift Cylinder Service  . . . . . . . . . . . . . 104
Steering Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Steering Cylinder Service  . . . . . . . . . . . . . . . . . . 108
Hydraulic Reservoir   . . . . . . . . . . . . . . . . . . . . . . . 110
Hydraulic Oil Cooler  . . . . . . . . . . . . . . . . . . . . . . . 112
Valve (PR) Pressure  . . . . . . . . . . . . . . . . . . . . . . 46
ADJUSTMENTS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Adjust Cutting Deck Flow Control Valve  . . . . . . . 48
Groundsmaster 4100--D
Page 4 -- 1  Rev. E
Hydraulic System
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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Document TypeCatalog
LanguageEnglish
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower
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Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
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