Pto Switch - Toro Groundsmaster 360 Service Manual

PTO Switch

The PTO switch is located on the control panel (Fig. 32).
The PTO switch is pulled up to engage the PTO (cutting
deck).
On 2WD machines, the Standard Control Module
(SCM) monitors the operation of the PTO switch. If the
ignition switch is in the RUN position and the PTO switch
is engaged, the SCM PTO switch input LED should be
illuminated.
On 4WD machines, the Toro Electronic Controller (TEC)
monitors the operation of the PTO switch.
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 disengage PTO,
drive slowly to a safe flat area, move the throttle le-
ver to SLOW, release the traction pedal to the neu-
tral position and engage the parking brake. Clean
off all material from hood screen and allow engine
to low idle speed 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. Park machine on a level surface, lower cutting deck,
engage parking brake and stop engine.
2. Before disconnecting the PTO switch for testing, the
switch and its circuit wiring should be tested as an elec-
trical input using the SCM on 2WD machines or the
Diagnostic Display on 4WD machines (see Standard
Control Module or Diagnostic Display in the Trouble-
shooting section of this chapter). If input testing verifies
that the PTO switch and circuit wiring are functioning
correctly, no further PTO switch testing is necessary. If,
however, input testing determines that the PTO switch
and circuit wiring are not functioning correctly, proceed
with the following PTO switch testing procedure.
3. Remove control panel to gain access to PTO switch
(see Control Console Disassembly in the Service and
Repairs section of Chapter 6 -- Chassis).
4. Make sure ignition switch is in the OFF position. Dis-
connect machine wire harness electrical connector from
the PTO switch.
5. The PTO switch terminals are identified in Figure 33
and the circuitry of the PTO switch is shown in Figure 34.
With the use of a multimeter (ohms setting), the switch
functions may be tested to determine whether continuity
exists between the various terminals for each switch
position. Verify continuity between switch terminals.
Groundsmaster 360
6. Replace PTO switch if testing determines that it is
faulty.
7. If the PTO switch tests correctly and a circuit problem
still exists, check wire harness (see Electrical Schema-
tics and Wire Harness Drawings in Chapter 9 -- Foldout
Drawings).
8. After testing is complete, connect machine wire har-
ness connector to PTO switch. Secure control panel to
machine with removed fasteners.
1
1. Control panel
1. COM B terminal
2. NO B terminal
3. NC B terminal
SWITCH
POSITION
OFF (DOWN)
ON (UP)
Page 5 - - 31
2
Figure 32
2. PTO switch
4
1
5
3
6
Figure 33
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
Figure 34
Electrical System
2