Chapter 4
Hydraulic System
Table of Contents
NOTE: See Chapter 9 -- Foldout Diagrams for Hydraulic
Schematics
AUXILARY (LIFT/COUNTERBALANCE) SYSTEM
REPAIRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Float/Traction Assist Manifold Block Service . . . . 42
Steering/Auxiliary Pump Removal and
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Steering/Auxiliary Pump Repair
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . 3
Hydraulic Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Hydraulic Fitting Installation . . . . . . . . . . . . . . . . . . . 3
Pushing or Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Draining and Refilling System . . . . . . . . . . . . . . . . . 5
HYDRAULIC FLOW DIAGRAMS . . . . . . . . . . . . . . . . 6
Typical Circuits -- Engine Running . . . . . . . . . . . . . . 6
Typical Circuits -- Mowing . . . . . . . . . . . . . . . . . . . . 10
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 14
TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
TEST NO. 1: Traction Circuit Working Pressure
and Relief Pressure . . . . . . . . . . . . . . . . . . . . . . . . 24
TEST NO. 2: Traction Circuit Charge Pressure . 25
TEST NO. 3: Steering Circuit Working Pressure
and Relief Pressure . . . . . . . . . . . . . . . . . . . . . . . . 26
TEST NO. 4: Lift Circuit Working Pressure and
Relief Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
TEST NO. 5: Counterbalance Pressure . . . . . . . . 28
Diagnosing Cutting Performance Problems . . . 28.3
Deck Motor Internal Leakage Test . . . . . . . . . . . 28.4
TEST NO. 6: Deck Drive Circuit Working
(Models 30582 and 30583) . . . . . . . . . . . . . . . 44.1
Steering/Auxiliary Pump Repair
(Models 30580 and 30581) . . . . . . . . . . . . . . . . . 45
Front Lift Cylinder Removal and Installation . . . . 46
Front Lift Cylinder Repair . . . . . . . . . . . . . . . . . . . . 46
Wing Lift Cylinder Removal and Installation . . . . 48
Wing Lift Cylinder Repair . . . . . . . . . . . . . . . . . . . . 48
Lift Control Valve Removal and Installation . . . . . 50
Lift Control Valve Repair . . . . . . . . . . . . . . . . . . . . . 50
STEERING SYSTEM REPAIRS . . . . . . . . . . . . . . . . 52
Steering Cylinder Removal and Installation . . . . . 52
Steering Cylinder Repair . . . . . . . . . . . . . . . . . . . . . 52
Steering Control Unit Removal and Installation . . 54
Steering Control Unit Repair (Models 30580
and 30581) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.1
Steering Control Unit Repair (Models 30582
and 30583) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.1
HYDRAULIC RESERVOIR AND FILTER . . . . . . . . 55
Flushing the Hydraulic System . . . . . . . . . . . . . . . 55
Inspecting Reservoir Parts . . . . . . . . . . . . . . . . . . . 56
SAUER/SUNDSTRAND (DANFOSS) M46--AXIALPIS-
TON PUMPS AND MOTORS SERVICE MANUAL
SAUER/SUNDSTRAND (DANFOSS) M46--AXIALPIS-
TON PUMPS AND MOTORS REPAIR MANUAL
VICKERS GEAR PUMP OVERHAUL MANUAL
HALDEX/BARNES G20 & G30 SERIES HYDRAULIC
GEAR PUMPS INSPECTION/SERVICING
Pressure and Relief Pressure . . . . . . . . . . . . . . . 29
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Traction Control Neutral Adjustment . . . . . . . . . . . 30
Traction Control Rod Adjustment . . . . . . . . . . . . . . 31
Cruise Control Adjustment . . . . . . . . . . . . . . . . . . . 31
TRACTION DRIVE SYSTEM REPAIRS . . . . . . . . . 32
Mow/Transport Solenoid Service . . . . . . . . . . . . . . 32
Variable Displacement Pump Removal and
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Wheel Motor Removal and Installation . . . . . . . . . 35
PTO SYSTEM REPAIRS . . . . . . . . . . . . . . . . . . . . . . 36
PTO Valve Block Service . . . . . . . . . . . . . . . . . . . . 36
PTO Valve Block Service (S/N 50001 and Up) 36.1
PTO Pump Removal and Installation . . . . . . . . . . 38
PTO Pump Repair (Models 30580 and 30581) 38.1
PTO Pump Repair (Models 30582 and 30583) 38.2
Deck Motor Removal and Installation . . . . . . . . . . 39
Deck Motor Repair . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Deck Motor Repair (P/N 94--4907) . . . . . . . . . . 40.1
Wing Deck Hose Replacement
EATON CHAR--LYNN STEERING CONTROL UNITS
REPAIR INFORMATION
EATON CHAR--LYNN 4000 COMPACT SERIES DISC
VALVE GEROLER MOTOR REPAIR INFORMATION
(S/N 50001 and Up) . . . . . . . . . . . . . . . . . . . . . 40.3
Wing Deck Motor Hydraulic Hose Replacement . 41
Groundsmaster 580--D
Table of Contents
Page 4 -- 1 Rev. G
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Tags | Toro Groundsmaster 30581, Toro Groundsmaster 580 D |
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| Document Type | Service Manual |
| Language | English |
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