Service Manual
Table Of Contents
- Title Page
- Revision History
- Reader Comments
- NOTES:
- Preface
- Table of Contents
- Chapter 1 : Safety
- Chapter 2 : Specifications and Maintenance
- Chapter 3 : Diesel Engine
- Chapter 4 : Hydraulic System
- 1 Specifications
- General Information
- Hydraulic Hoses
- Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting)
- Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fitting into the Component Port)
- Traction Unit Operator's Manual
- Pushing the Traction Unit
- Releasing Pressure from the Hydraulic System
- Traction Circuit (Closed Loop) Component Failure
- Hydraulic Schematics
- Special Tools
- Troubleshooting
- Testing the Hydraulic System
- Testing the Traction System Operation
- Testing the Charge Relief Valve Pressure (Using Pressure Gauge)
- Testing the Transmission Piston Pump Flow (Using Tester with Pressure Gauges and Flow Meter)
- Testing the Traction Relief Valve Pressure (Using Tester with Pressure Gauges and Flow Meter)
- Testing the Wheel Motor Efficiency (Using Tester with Pressure Gauges and Flow Meter)
- Testing the PTO Pressure Valve (Using Pressure Gauge)
- Testing the Implement Relief Pressure (Using Pressure Gauge)
- Testing the Gear Pump Flow (Using Tester with Pressure Gauges and Flow Meter)
- Testing the Lift Cylinder for Internal Leakage
- Service and Repairs
- General Precautions for Removing and Installing the Hydraulic System Components
- Checking the Hydraulic Lines and Hoses
- Priming the Hydraulic Pumps
- Flushing the Hydraulic System
- Charging the Hydraulic System
- Hydraulic Tank
- Wheel Motors
- Servicing the Wheel Motor
- Transmission
- Servicing the Transmission
- Gear Pump
- Servicing the Gear Pump
- Lift Control Manifold
- Servicing the Lift Control Manifold
- Polar Trac Hydraulic Control Valve
- Servicing the Polar Trac Hydraulic Control Valve
- Lift Cylinder
- Servicing the Lift Cylinder
- Polar Trac Lift Cylinder
- Servicing the Polar Trac Lift Cylinder
- Oil Cooler
- Chapter 5 : Electrical System
- General Information
- Special Tools
- InfoCenter Display
- Troubleshooting
- Electrical System Quick Checks
- Testing the Electrical Components
- Key Switch
- PTO Switch
- Neutral Switches
- Seat Switch
- Engine Oil Pressure Switch
- Parking Brake Sensor
- PTO Solenoid Valve Coil
- Fusible Link Harness
- Diode Assemblies
- Resistor Assembly
- Glow Relay
- Start and EGR Relays
- Fuel Pump
- Dual Temperature Switch
- Fuses
- CAN-bus Terminator Resistor
- Deck Lift/Lower Switch
- Lift Control Manifold Solenoid Valve Coil
- Adjustments
- Service and Repairs
- Chapter 6 : Chassis
- Chapter 7 : Cutting Deck
- Appendix A: Foldout Drawings
- Electrical Drawing Designations
- Hydraulic Schematic
- Electrical Schematic - Platform (For machine serial number below 403430000)
- Electrical Schematic - Platform (For machine serial number above 403430001)
- NO TITLE
- Electrical Schematic - Engine
- Electrical Schematic - Cab (1 of 2)
- Electrical Schematic - Cab (2 of 2)
- Wire Harness Drawing - Platform (1 of 2) (For machine serial number below 403430000)
- Wire Harness Drawing - Platform (2 of 2) (For machine serial number below 403430000)
- Wire Harness Drawing - Platform (1 of 2) (For machine serial number above 403430001)
- Wire Harness Drawing - Platform (2 of 2) (For machine serial number above 403430001)
- Wire Harness Drawing - Engine (1 of 2)
- Wire Harness Drawing - Engine (2 of 2)
- Wire Harness Drawing - Cab Power
- Wire Harness Drawing - Cab Headliner
- Wire Harness Diagram - Cab Headliner
- Wire Harness Drawing - Cab Power Point Kit
- Wire Harness Drawing - Auxiliary Power Model 30382
- Wire Harness Drawing - Light Kit Model 30374
Troubleshooting
Thefollowingchartcontainsinformationtotroubleshoothydrauliccircuit
problems.Therecanbemorethan1causeforamachinemalfunction.
RefertoT estingtheHydraulicSystem(page4–31)forprecautionsandspecic
hydraulictestprocedures.
GeneralHydraulicSystemProblems
Problem
PossibleCauses
Thehydraulicuidisleakingfromthesystem.•Thetting(s),hose(s),ortube(s)arelooseordamaged.
•TheO-ring(s)orseal(s)aremissingordamaged.
Thehydraulicuidfoamsexcessivelycausing
uidleakagefromthehydraulictankbreather.
Note:Someaerationofthehydraulicuidonthismachine
isnormal.
•Thehydraulic-uidlevelinthehydraulictankislow.
•Thehydraulicsystemhasawrongtypeofuid.
•Oneofthepumpsuctionlineshasanairleak.
•Theincompatiblehydraulicuidsaremixedinthesystem.
•Thereiswaterinthehydraulicsystem.
Thehydraulicsystemoperateshot.•Thetransmissionpressureishighduetoload
ordraggingbrakes.
•Thehydraulic-uidlevelinthehydraulictank
islowortheinletlterislooseorclogged.
•Thehydraulicuidiscontaminatedortheuid
viscosityistoolight.
•Theoilcoolerisdamagedorplugged.Theoil
coolerairowisobstructed.
•Thetransmissionbypassvalve(s)isopenordamaged.
•Thegearpumpreliefvalveisstuckopen.
•Thetransmissioncheckvalveisnotseatingorisdamaged.
•Thechargepressureislow.
•Thetransmissionorwheelmotor(s)iswornordamaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
TractionCircuitProblems
Problem
PossibleCauses
Thetractionresponseissluggish.
•Thetransmissionbypassvalve(s)isopenordamaged.
•Thebrakeisdraggingorbinding.
•Thetransmission-checkvalve,reliefvalve,and/or
ushingvalveisleaking.
•Thechargepressureislow.Thehydraulicuidisverycold.
•Thetransmissionorwheelmotor(s)iswornordamaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
Neutralisdifculttond.
•Theexternalcontrollinkageisincorrectly
adjusted,disconnected,binding,ordamaged.
•Theoriceinthetransmission-checkvalve(s)isplugged.
•Thetransmissioniswornordamaged.
HydraulicSystem:Troubleshooting
Page4–28
Groundsmaster7210
16222SLRevF