Checking The Safety Interlock System - Toro 04356 Operator's Manual

Checking the Safety Interlock
System
If the safety interlock switches are disconnected
or damaged the machine could operate
unexpectedly causing personal injury.
• Do not tamper with the interlock switches.
• Check the operation of the interlock
switches daily and replace any damaged
switches before operating the machine.
The purpose of the interlock system (Figure 21) is to
prevent the engine from cranking or starting unless the
traction shift selector is in Neutral and the cutting units
are disengaged. In addition, the engine will stop when:
• the cutting units are engaged with the operator off
of the seat
• the traction shift selector is in the No. 1 or No. 2
position with the operator off of the seat or the
parking brake is engaged
Figure 21
1. Traction switch
2. Seat switch
Perform the following system checks daily to be sure
the interlock system is operating correctly:
1. Sit on the seat, engage the parking brake, and move
the shift selector to neutral. Remove your foot
from the traction pedal and make sure the pedal is
in neutral. Fully depress the lift pedal and release
it. Try to start the engine. The engine should
crank and run, which means the interlock system is
operating correctly. If the engine did crank, proceed
3. Mow/lift switch
to step 2. If the engine did not crank, contact your
local Toro Distributor for assistance.
2. Sit on the seat and engage the parking brake.
Depress the lift pedal fully and release it. Move the
traction shift selector to the #1 and #2 positions
while trying to start the engine in each position. The
engine should not crank, which means the traction
switch on the valve bank is operating correctly. If
the engine did not crank, proceed to step 3. If the
engine cranked, contact your local Toro Distributor
for assistance.
3. Sit on the seat and engage the parking brake. Fully
depress the lift pedal and release it. Move the
traction shift selector to neutral and try to start the
engine. The engine should start and continue to
run, which means the traction switch and mow/lift
switch on the valve bank are operating correctly;
proceed to step 4. If the engine cranked but did
not start, the problem is not in the interlock system.
If engine did not crank, contact your local Toro
Distributor for assistance.
4. Sit on the seat, engage the parking brake, and move
the traction shift selector to neutral. Depress the
mow pedal and try to start the engine. The engine
should not crank, which means the mow/lift switch
is operating correctly. If the engine did not crank,
proceed to step 5. If the engine cranked, contact
your local Toro Distributor for assistance.
5. Sit on the seat and move the traction shift selector
to neutral. Fully depress the lift pedal and release
it. Start the engine and depress the mow pedal.
Carefully rise from the seat; the engine should stop.
If the engine stops, the interlock system is operating
correctly. If the engine does not stop, stop the
engine and find the problem before operating the
machine again. If assistance is required, contact
your local Toro Distributor.
6. Sit on the seat and move the traction shift selector
to Neutral. Fully depress the lift pedal and release
it. Start the engine and drive to an open area that is
free of debris and foreign objects. Keep all people,
especially children away from the front of the
machine and out of the area of operation. Move the
shift selector to Neutral, make sure the mow pedal
is disengaged, set the throttle control at half speed,
and depress the brake pedal (do not engage the
parking brake button). While holding the steering
wheel, brace your feet on the foot deck and brake
pedal and move the shift selector to the #1 position.
Carefully rise from the seat; the engine should stop.
22