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 Page 6 – 17 Chassis
Disassembly (Figs. 16 and 17)
NOTE: Refer to the Polar Trac
TM
Operator’s Manual for
additional information regarding drive track and wheel
removal.
1. Park machine on a level surface, lower implement,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Remove wheels as needed to gain access to wheel
hub(s) (see Polar Trac
TM
Wheels Removal in this sec-
tion).
3. Make sure that machine is supported with jack
stands.
4. Remove the dust cap from the wheel hub.
5. Remove the cotter pin and slotted hex nut. Slide the
wheel hub with bearings from the spindle shaft.
6. Remove the seal from the wheel hub. Discard seal.
7. Remove the bearing cones from both sides of the
wheel hub.
8. Clean the bearings in solvent. Make sure the bear-
ings are in good operating condition. Clean the inside of
the wheel hub. Check the bearing cups for wear, pitting
or other damage. Replace all worn or damaged parts.
Assembly (Figs. 16 and 17)
1. If bearing cups were removed from the wheel hub,
press new cups into the hub until they seat against the
shoulder of the hub.
IMPORTANT: The lip of the seal must be toward the
bearing. The seal should be pressed in so it is flush
with the end of the wheel hub.
2. Pack both bearings with grease. Install one bearing
into the bearing cup on inboard side of the wheel hub.
Lubricate the inside of a new seal and press it into the
wheel hub with the seal lip toward the bearing.
3. Fill wheel hub cavity between bearings approximate-
ly 50% full of grease. Position remaining bearing into the
outer bearing cup.
4. Slide the wheel hub assembly onto the spindle shaft
and secure it in place with the slotted hex nut. DO NOT
fully tighten the nut or install the cotter pin.
5. While rotating the wheel hub by hand, torque the
slotted hex nut from 75 to 100 in–lb (8.5 to 11.3 N–m) to
set the bearings. Then, loosen the nut until the hub has
endplay.
6. While rotating the wheel hub by hand, torque the
slotted hex nut from 15 to 20 in–lb (1.7 to 2.3 N–m)
while aligning hex nut slot with shaft hole. After tighten-
ing, make sure that the wheel hub does not have any
free play.
7. Install cotter pin.
8. Install dust cap.
9. Install drive track and wheels to machine. (see Polar
Trac
TM
Wheels Installation in this section). Make sure
that drive track is installed in the correct direction of rota-
tion.
10.Lower machine to ground.
11. Torque all removed lug nuts evenly in a crossing pat-
tern from 65 to 85 ft–lb (88 to 115 N–m).
1. Dust cap
2. Cotter pin
3. Slotted hex nut
4. Bearing cone
5. Bearing cup
6. Wheel hub
7. Wheel stud (5 used)
8. Seal
Figure 17
1
2
3
4
5
6
7
4
5
8
See text
procedure
for tightening
Chassis