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 - 97
Removal (Fig. 108)
WARNING
Before disconnecting or performing any work on
the hydraulic system, all pressure in the system
must be relieved. See Relieving Hydraulic System
Pressure in the General Information section.
1. Park machine on a level surface, lower cutting deck
(or implement), stop engine, engage parking brake and
remove key from the ignition switch.
2. Thoroughly clean hydraulic hose ends and fittings on
lift cylinder to prevent hydraulic system contamination.
3. Label hydraulic hoses for assembly purposes. Also,
label orientation of hydraulic hose at barrel end of lift cyl-
inder to allow correct assembly.
4. Disconnect hydraulic hoses connected to the hy-
draulic fittings on the lift cylinder. Install clean plugs in
hose openings to prevent system contamination.
5. Remove retaining ring that secures lift cylinder barrel
end to pin on carrier frame.
6. Remove flange head screw and pivot pin that secure
lift cylinder rod end to RH lift arm (Fig. 109).
7. Remove lift cylinder from machine.
8. If necessary, remove hydraulic fittings from lift cylin-
der. Remove and discard O- rings from fittings. Note that
fitting on barrel end of cylinder is an orifice fitting that is
different than fitting on rod end of cylinder.
Installation (Fig. 108)
1. If hydraulic fittings were removed from lift cylinder, lu-
bricate and install new O- rings to fittings. Install fittings
into lift cylinder ports and torque fittings from 15 to 19 ft-
lb(20to25N-m). Make sure that fitting on barrel end
of cylinder is the orifice fitting.
2. Position lift cylinder to the machine.
3. Secure cylinder barrel end to pin on carrier frame
with retaining ring.
4. Secure cylinder rod end to RH lift arm with pivot pin
and flange head screw (Fig. 109).
5. Remove plugs that were installed in hydraulic hoses
during the removal procedure. Correctly connect hy-
draulic hoses to lift cylinder fittings using labels placed
during lift cylinder removal (see Hydraulic Hose and
Tube Installation in the General Information section of
this chapter).
6. Lubricate grease fittings on lift cylinder and pivot pin.
7. Make sure hydraulic tank is full. Add correct oil if nec-
essary.
1. Lift cylinder 2. Pivot pin
Figure 109
1
2
Hydraulic
System