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 - 85
Removal (Fig. 99)
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 control valve to prevent hydraulic system contamina-
tion.
3. Label all hydraulic hoses and fittings for assembly
purposes.
4. Disconnect hydraulic hoses connected to the hy-
draulic fittings on the lift control valve. Allow hoses to
drain into a suitable container. Install clean plugs in hose
openings to p revent system contamination.
5. Remove cotter pin that secures lift lever valve link to
control valve spool (Fig. 100). Slide link from spool.
6. Support the control valve to prevent it from falling
during removal.
7. Remove two (2) cap screws, lock washers and flat
washers that secure lift control valve to machine (Fig.
100). Remove control valve.
8. If necessary, remove hydraulic fittings from lift con-
trol valve. Note orientation of fittings f or assembly pur-
poses. Remove and discard O- rings from fittings.
Installation (Fig. 99)
1. If hydraulic fittings were removed from lift control
valve, lubricate and install new O- rings to fittings. Install
fittings into valve ports (see Hydraulic Fitting Installation
in the General Information section of this chapter).
Orientate fittings as noted during removal.
2. Position lift control valve to machine frame and se-
cure with two (2) cap screws, lock washers and flat
washers (Fig. 100).
3. Attach lift lever valve link to control valve spool and
secure with cotter pin (Fig. 100).
4. Remove plugs that were installed in hydraulic hoses
during the removal procedure. Attach hydraulic hoses to
fittings on lift control valve using labels placed during re -
moval (see Hydraulic Hose and Tube Installation in the
General Information section of this chapter).
5. Make sure hydraulic tank is full. Add correct oil if nec-
essary.
1. Lift control valve
2. Lift lever valve link
3. Cap screw
Figure 100
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2
3
3
Hydraulic
System