Checking The Interlock System - Toro 04356 Operator's Manual

Note: Since the machine is new and the bearings and
reels are tight, it is necessary to use the Fast throttle
control position for this check. A fast throttle setting
may not be required after the break-in period.

Checking the Interlock System

Caution
If 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.
Replace switches every two years regardless of
whether they are operating properly or not.
The purpose of the interlock system (Fig. 22) 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 22
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 to step 2. If the engine did not crank,
contact your local Toro Distributor for assistance.
3
1
2
3. Mow/lift switch
21
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. If the engine stops, the interlock system is
operating correctly.
7. Repeat step 6 with the shift selector in the #2 position.
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.
Note: The machine is equipped with an interlock switch on
the parking brake. The engine will stop if the traction shift
selector is in the #1 and #2 positions with the parking brake
engaged.