Verify Interlock Operation - Toro Groundsmaster 300 Series Service Manual

Verify Interlock System Operation
The machine has interlock switches in the electrical
system. These switches are designed to stop the engine
when operator gets off the seat while either the PTO
lever is engaged or traction pedal is depressed. How-
ever, operator may get off the seat while engine is
running. Although engine will continue to run if PTO
lever is disengaged and traction pedal is released, it is
strongly recommended that the engine be stopped be-
fore dismounting from the seat.
CAUTION
Do not disconnect the interlock switches.
Check operation of switches daily to assure
interlock system is operating correctly. If a
switch is malfunctioning, replace it before
operating the machine. To ensure maximum
safety, replace all switches after every two
years or 1000 hours, whichever comes first.
To check operation of interlock switches:
1. Drive the machine slowly to a large, relatively open
area. Lower cutting unit, stop the engine and apply
parking brake.
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Groundsmaster 300 Series
2. Sit on seat. Move PTO lever to ON position. With the
traction pedal in neutral position, try to start the engine.
The engine should not crank. If the engine cranks, there
is a malfunction in the interlock system that should be
corrected before beginning operation.
3. Sit on seat. Move PTO lever to OFF and depress the
traction pedal. Try to start the engine. The engine should
not crank. If the engine cranks, there is a malfunction in
the interlock system that should be corrected before
beginning operation.
Do not operate machine without implement
unless the PTO drive shaft is also removed.
4. Sit on seat and start the engine. Raise off the seat
and move the PTO lever to ON. The engine should stop
within 2 - 3 seconds. If the engine does not stop, there
is a malfunction in the interlock system that should be
corrected before beginning operation.
Page 6 - 17 Troubleshooting
CAUTION
(Groundsmaster 322-D/325-D)