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
- Kubota 05 E2B Series Workshop Manual (S/N below 280000000)
- Kubota 05-E3B Series Workshop Manual (S/N 280000001 and up)
- Kubota 05-E4B Series Workshop Manual
- 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
- Parker Torqmotor Service Procedure
- 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 7200/7210Page 5 - 26Electrical System
Dual Temperature Switch (Polar Trac
TM
Machines)
On machines equipped with Polar Trac
TM
, the dual tem-
perature switch includes two normally open circuits
used to monitor engine coolant temperature. These
switch circuits are the high temperature warning circuit
and t he high temperature shutdown circuit. The dual
temperature switch is attached to the engine water
pump housing (Fig. 34).
When engine coolant temperature rises to approximate-
ly 220
o
F (105
o
C), the high temperature warning circuit
closes. T his closed circuit causes the High Temperature
Warning Light on the console to illuminate and also pro-
vides an input to the Standard Control Module (SCM).
This input causes the SCM high temperature warning
LED to illuminate and the PTO implement to shut down.
If engine coolant temperature rises to approximately
240
o
F(115
o
C), the high temperature shutdown circuit
closes and provides an input to the Standard Control
Module (SCM). This input causes the SCM high temper-
ature shutdown LED to illuminate and the engine to shut
down.
The Standard Control Module (SCM) monitors the op-
eration of the dual temperature switch. If excessive cool-
ant temperature causes either switch circuit to close, the
appropriate LED on the SCM will be illuminated. The
switch and its circuit wiring should be tested using the
SCM before performing the following testing procedure.
Testing
1. Park machine on a level surface, lower implement,
stop engine, apply parking brake and remove key from
ignition switch. Open hood to gain a ccess to engine.
CAUTION
Make sure engine is cool before removing the
dual temperature switch from engine. Do not
open radiator cap or drain coolant if the radiator
or engine is hot. Pressurized, hot coolant can es-
cape and cause burns.
2. Lower the coolant level in the engine and remove the
dual temperature switch from the engine.
3. Put the end of the switch in a container of oil with a
thermometer and slowly heat the oil (Fig. 35).
CAUTION
Handle the hot oil with extreme care to prevent
personal injury or fire.
4. Check resistance of the switch with a multimeter
(ohms setting) as the oil temperature increases.
A. The high temperature warning circuit is normally
open and should close from 214
o
to 226
o
F(101
o
to
108
o
C).
B. The high temperature shutdown circuit is normal-
ly open and should close from 234
o
to 246
o
F(112
o
to
119
o
C).
5. Replace the switch if either of the specifications are
not met.
6. After testing is complete, install temperature switch
totheenginehousing.
A. Clean threads of housing and switch thoroughly.
Apply thread sealant to the threads of the switch.
B. Thread switch into the housing. Torque switch
from 22 to 28 ft- lb (29.4 to 39.2 N- m).
C. Reconnect harness wires to temperature switch.
7. Fill engine cooling system. Lower and secure hood.
1. Dual temp switch
2. Warning circuit
3. Shutdown circuit
Figure 34
1
2
3
1
Figure 35