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 5 - 13 Electrical System
PTO Switch
The PTO switch is located on the control panel (Fig. 10).
The PTO switch is pulled up to engage the PTO (cutting
deck or implement).
The Standard Control Module (SCM) monitors the posi-
tion of the PTO switch (up or down). Using inputs from
the PTO switch and other switches in the interlock sys-
tem, the SCM controls the energizing of the transmis-
sion solenoid valve and thus, the PTO. If the ignition
switch is in the ON position and the PTO switch is en-
gaged, the SCM PTO switch input LED should be illumi-
nated.
IMPORTANT: During machine operation, if the PTO
shuts down and the console temperature warning
light is illuminated due to excessive engine coolant
temperature, avoid shutting off the engine. Under
this condition, the operator should push the PTO
knob down, slowly drive to a safe flat area, move the
throttle lever to the SLOW position, move the trac-
tion control levers into the neutral locked position
and engage the parking brake. The engine should
be allowed to idle for several minutes while it cools
to a safe level. Then, the cooling system should be
checked before returning the machine to service.
Testing
1. Before disconnecting the PTO switch for testing, the
switchanditscircuitwiringshouldbetestedasaSCM
input (see Standard Control Module in this section).
2. If the SCM verifies that the PTO switch and c ircuit
wiring are functioning correctly, no further switch testing
is necessary.
3. If the SCM determines that the PTO switch and cir-
cuit wiring are not functioning correctly, test PTO switch
as follows:
A. Make sure ignition switch is in the O FF position.
Locate PTO switch for testing.
B. Disconnect machine wire harness electrical con-
nector from the PTO switch.
C. The PTO switch terminals are identified as shown
in Fig. 11. The circuitry of the PTO switch is shown in
ithe chart in the right column. With the use of a multi-
meter (ohms setting), the switch functions may be
tested to determine whether continuity exists be-
tween the various terminals for each switch position.
Verify continuity between switch terminals.
D. Replace PTO switch if necessary.
E. If the PTO switch tests correctly and a circuit
problem still exists, check wire harness (see Electri-
cal Schematics and Circuit Drawings in Chapter 8 -
Foldout Diagrams).
F. Connect machine wire harness connector to PTO
switch. Check PTO switch operation.
1. Control panel 2. PTO switch
Figure 10
2
1
1. COM B terminal
2. NO B terminal
3. NC B terminal
4. COM C terminal
5. NO C terminal
6. NCCterminal
Figure 11
2
3
1
6
4
5
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
OFF (DOWN) COM B + NC B
COM C + NC C
COM B + NO B
COM C + NO C
ON (UP) COM B + NO B
COM C + NO C
COM B + NC B
COM C + NC C
Electrical
System