Verify Interlock Operation - Toro Groundsmaster 455-D Service Manual

Verify Interlock System Operation
The purpose of the interlock system is to prevent the
engine from cranking or starting unless the traction
pedal is in NEUTRAL and the cutting unit engagement
switch is DISENGAGED. In addition, the engine will stop
when the cutting unit engagement switch is engaged or
traction pedal is depressed with operator off the seat.
1. In a wide open area free of debris and bystanders,
lower cutting unit to the ground. Stop engine.
2. Move cutting unit engagement switch to DISEN-
GAGED position and remove foot from traction pedal so
it is fully released.
3. Rotate the ignition key to START Engine should start.
If engine starts, proceed to step 4. If engine does not
start, there may be a malfunction in the interlock system.
4. Raise off the seat and engage the cutting unit engage ­
ment switch while the engine is running. The engine
should stop within 2 seconds. If engine stops, the switch
is operating correctly – proceed to step 5. If engine does
not stop, there is a malfunction in the interlock system.
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Groundsmaster 455-D
5. Raise off the seat and depress the traction pedal while
engine is running and the cutting unit engagement
switch is DISENGAGED. The engine should stop within
2 seconds. If engine stops, the switch is operating
correctly – continue operation. If engine does not stop,
there is a malfunction in the interlock system.
THE INTERLOCK SWITCHES ARE FOR THE
OPERATOR'S PROTECTION, SO DO NOT
DISCONNECT THEM. CHECK OPERATION
OF THE SWITCHES DAILY TO ASSURE IN-
TERLOCK SYSTEM IS OPERATING. IF A
SWITCH IS DEFECTIVE, REPLACE IT BE-
FORE OP ERATING . REGARDLESS IF
SWITCHES ARE OPERATING PROPERLY OR
NOT, REPLACE THEM EVERY TWO YEARS
TO ASSURE MAXIMUM SAFETY. DO NOT
RELY ENTIRELY ON SAFETY SWITCHES -
USE COMMON SENSE!
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CAUTION
Troubleshooting