Service Manual
Table Of Contents
- Title Page
- Revision History
- Reader Comments
- Preface
- Table Of Contents
- 1 - Safety
- 2 - Product Records and Maintenance
- 3 - Kubota Diesel Engine
- 4 - Hydraulic System
- Specifications
- General Information
- Hydraulic Schematics
- Hydraulic Flow Diagrams
- Special Tools
- Troubleshooting
- Testing
- Traction System Operation Testing
- Charge Relief Valve Pressure Test (Using Pressure Gauge)
- Transmission Piston Pump Flow Test (Using Tester with Pressure Gauges and Flow Meter)
- Traction Relief Valve Pressure Test (Using Tester with Pressure Gauges and Flow Meter)
- Wheel Motor Efficiency Test (Using Tester with Pressure Gauges and Flow Meter)
- PTO Pressure Valve Test (Using Pressure Gauge)
- Implement Relief Pressure Test (Using Pressure Gauge)
- Gear Pump Flow Test (Using Tester with Pressure Gauges and Flow Meter)
- Lift Cylinder Internal Leakage Test
- Service and Repairs
- General Precautions for Removing and Installing Hydraulic System Components
- Flush Hydraulic System
- Charge Hydraulic System
- Hydraulic Tank
- Wheel Motors
- Wheel Motor Service
- Transmission
- Transmission Service
- Gear Pump
- Gear Pump Service
- Manual Lift Control Valve (SN Below 313000000)
- Manual Lift Control Valve Service (SN Below 313000000)
- Lift Control Manifold (SN Above 313000000)
- Lift Control Manifold Service (SN Above 313000000)
- Polar TracTM Hydraulic Control Valve
- Polar TracTM Hydraulic Control Valve Service
- Lift Cylinder
- Lift Cylinder Service
- Polar TracTM Lift Cylinder
- Polar TracTM Lift Cylinder Service
- Oil Cooler
- 5 - Electrical System
- Electrical Schematics and Diagrams
- Special Tools
- Troubleshooting
- Electrical System Quick Checks
- Component Testing
- Ignition Switch
- Indicator Lights
- Hour Meter
- PTO Switch
- Neutral Switches
- Seat Switch
- Parking Brake Switch (SN Below 310000000)
- Parking Brake Switch (SN Above 310000000)
- Standard Control Module
- Standard Control Module Logic Chart
- PTO Solenoid Valve Coil
- Lift Control Manifold Solenoid Valve Coils (SN Above 313000000)
- Fusible Link Harness
- Diode Assembly
- Glow Relay
- High Temperature Warning Switch
- High Temperature Shutdown Switch
- Dual Temperature Switch (Polar TracTM Machines)
- Deck Lift/Lower Switch (SN Above 313000000)
- Fuel Pump
- Fuel Stop Solenoid
- Glow Controller
- Service and Repairs
- 6 - Chassis
- 7 - Cutting Deck
- 8 - Foldout Diagrams
- Electrical Drawing Designations
- Hydraulic Schematics
- Hydraulic Schematic (SN Below 313000000)
- Hydraulic Schematic (SN Below 313000000) with Rear Attach Lift Kit
- Hydraulic Schematic (SN Below 313000000) with Polar Trac Installed)
- Hydraulic Schematic (SN Below 313000000) with Polar Trac and Rear Attach Lift Kit
- Hydraulic Schematic (SN From 313000001 to 314999999)
- Hydraulic Schematic (SN Above 315000000)
- Electrical Schematics
- Circuit Diagrams
- Wire Harness
Groundsmaster 7200/7210 Hydraulic SystemPage 4 – 21
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Problem
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Possible Cause
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Neutral is difficult to find.
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External control linkage is misadjusted, disconnected, binding or
damaged.
Orifice in transmission check valve(s) is plugged.
Transmission is worn or damaged.
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No traction exists in either direction.
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Oil level in hydraulic tank is low.
Transmission by–pass valves are open.
Charge pressure is low.
Engine flywheel coupling is damaged.
Transmission or wheel motor(s) is worn or damaged.
(NOTE: If one traction circuit component has internal wear or dam-
age, it is possible that other traction components are also dam-
aged)
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Wheel motor will not turn.
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Transmission by–pass valve(s) is open.
Transmission or wheel motor is worn or damaged.
(NOTE: If one traction circuit component has internal wear or dam-
age, it is possible that other traction components are also dam-
aged)
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Wheel motor will not hold load in
neutral.
NOTE: Machine may not be com-
pletely stationary if parked on an in-
cline without the parking brake en-
gaged.
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Make up fluid from charge pump is not available.
Check valves in transmission are damaged.
Valve plate(s) in transmission is worn or damaged.
Wheel motor is worn or damaged.
Cylinder block assembly in transmission is worn or damaged.
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Single wheel motor turns while un-
loaded, but slows down or stops
when load is applied.
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Wheel motor is worn or damaged.
Transmission components (e.g. piston pump, relief valve, check
valve) for the problem wheel motor are worn or damaged.
(NOTE: If one traction circuit component has internal wear or dam-
age, it is possible that other traction components are also dam-
aged)
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Machine does not track straight.
NOTE: If machine does not track
straight, look for problem with com-
ponents that effect the weaker trac-
tion side of the machine.
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External traction control linkage is misadjusted, disconnected, bind-
ing or damaged.
Transmission by–pass valve(s) is open.
Brake is dragging or binding.
Transmission check valve is not seating or is damaged.
Transmission or wheel motor(s) is worn or damaged.
Hydraulic
System