Pto Switch - Toro Groundsmaster 7200 Service Manual

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
switch and its circuit wiring should be tested as a SCM
input (see Standard Control Module in this section).
2. If the SCM verifies that the PTO switch and circuit
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 OFF 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.
Groundsmaster 7200/7210
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.
2
1. Control panel
1. COM B terminal
2. NO B terminal
3. NC B terminal
SWITCH
POSITION
OFF (DOWN)
ON (UP)
Page 5 - 13
Figure 10
2. PTO switch
4
1
5
3
6
Figure 11
4. COM C terminal
5. NO C terminal
6. NC C terminal
CLOSED OPEN
CIRCUITS CIRCUITS
COM B + NC B COM B + NO B
COM C + NC C COM C + NO C
COM B + NO B COM B + NC B
COM C + NO C COM C + NC C
Electrical System
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