Toro 74670 Operator's Manual page 18

Understanding the Safety-Interlock
System
WARNING
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.
The safety-interlock system is designed for the following:
•
To prevent the engine from starting unless the traction
pedal is in the
NEUTRAL
•
To automatically ensure that the parking brake is engaged
and the PTO is off when starting.
•
To stop the engine whenever the traction pedal is not in
the position and you rise from the seat.
NEUTRAL
•
To automatically engage the parking brake and disengage
the PTO, when you rise out of the seat with the traction
pedal in the
NEUTRAL
•
To stop the engine whenever the parking brake is not
engaged and you rise from the seat.
Testing the Safety-Interlock System
1. Sit in the seat with the engine off and ensure that the
PTO switch is in the
2. Turn the ignition key to the
should crank. Do not start the engine or turn the
engine off prior to step 3.
3. Turn the key to the
SmartPark switch to the
should disengage and the brake light should turn off.
4. With the brake disengaged and traction pedal in the
position, turn the ignition switch to the
NEUTRAL
position. The brake should automatically
START
engage, the engine should crank, and the brake light
will turn on.
5. With the engine off and the key in the
engage the PTO by pulling up the blade-control switch,
you should hear the clutch engage.
6. Ensure that the traction pedal is in neutral and turn
the ignition switch to the
should disengage and the engine should crank and start
without the blades moving.
7. With the engine running, rise from the seat. The engine
should remain running and the brake light will be on.
8. Return to the seat and disengage the parking brake by
pushing the SmartPark switch to the
engine should continue to run.
position.
position.
position.
OFF
position; the starter
START
position and push the
ON
position. The brake
OFF
position,
ON
position. The PTO
START
position. The
OFF
9. Rise from the seat again. The brake should
automatically engage and the engine should continue
to run.
10. Return to the seat and engage the blades by pulling up
on the blade-control switch.
11. Rise from the seat. The blades should disengage and
the engine will continue to run.
12. Return to the seat and pull up the blade-control switch.
The blades should engage. Disengage the blades by
pushing down the blade-control switch.
13. Pull up the blade-control switch to engage the blades.
Move the traction pedal to the
blades should disengage. Move the traction pedal to
the position.
NEUTRAL
14. Pull up the blade-control switch to engage the blades.
Turn the Key Choice switch to the
and release it. The operating-in-reverse light should
illuminate.
15. Move the traction pedal to the
The blades should remain engaged. Push the
blade-control switch in to disengage the blades. The
operating-in-reverse light should turn off. Move the
traction pedal to the
16. If not engaged, push the SmarkPark switch to the
position and lightly tap the traction pedal in the either
the or
FORWARD
disengage and the brake light should turn off.
Note: Tap the pedal, but do not fully engage the pedal
as that will cause the brake system to bind and not
release.
17. With the brake released, engage the traction pedal
slightly and rise from the seat. The engine should shut
off.
18. Return to the seat and turn the ignition key to the
position. After several seconds, the brake system
OFF
should engage.
Note: With the key in the
light will not illuminate.
18
position. The
REVERSE
position
ON
position.
REVERSE
position.
NEUTRAL
position. The brake should
REVERSE
position, the brake
OFF
ON