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 7200/7210Hydraulic System Page 4 – 22
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Problem
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Possible Cause
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Gear pump is noisy (cavitation).
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Hydraulic tank oil level is low.
Hydraulic oil is very cold.
Suction line is restricted.
Suction line has an air leak.
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Cutting deck blades will not turn.
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An electrical problem exists (see Chapter 5 – Electrical System).
The engine coolant temperature is excessive.
Transmission solenoid valve is stuck.
Transmission charge pump is damaged (traction charge circuit also
affected).
Transmission pressure valve is faulty.
Cutting deck problem exists (see Chapter 7 – Cutting Deck).
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Cutting deck blade(s) turn too slowly.
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Engine speed is too low.
Cutting deck problem exists (see Chapter 7 – Cutting Deck).
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PTO does not stop when disen-
gaged.
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An electrical problem exists (see Chapter 5 – Electrical System).
Transmission solenoid valve is stuck or damaged.
PTO brake friction plates are worn or damaged.
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Cutting deck (or implement) will not
lift or lifts slowly.
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Engine speed is too low.
Lift cylinder linkage is binding or broken.
Lift arm bushings are binding.
Hydraulic tank oil level is low.
Gear pump pressure or flow is insufficient.
Gear pump is damaged.
Implement relief valve (in gear pump) is stuck open.
Lift cylinder leaks internally.
Lift control valve is defective.
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Cutting deck (or implement) raises,
but will not stay up.
NOTE: Lift cylinder and check valve
in lift control valve cannot provide an
absolutely perfect seal. The cutting
deck (or implement) may eventually
lower if left in the raised position.
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Lift cylinder leaks internally.
Check valve within the lift control valve leaks.
Lift control valve is worn or defective.