Checking The Interlock; Switches - Toro 30411 Groundsmaster 4100-D Operator's Manual

Important: Allow engine to idle for 5
minutes before shutting it off after a full
load operation. Failure to do so may lead to
turbo-charger trouble.

Checking the Interlock

Switches

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 or 1500
hours, whichever occurs first, regardless
of whether they are operating properly
or not.
The machine has interlock switches in the electrical
system. These switches are designed to stop the
engine when operator gets off of the seat when the
traction pedal is depressed. However, the operator
may get off of the seat while the engine is running
and the traction pedal is in neutral. Although the
engine will continue to run if the PTO lever is
disengaged and the traction pedal is released, it is
strongly recommended that the engine be stopped
before rising from the seat.
To check the operation of the interlock switches,
perform the following procedure:
1. Drive the machine slowly to a large, relatively
open area. Lower the cutting unit, stop the
engine, and apply the parking brake.
2. Sit on the seat 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.
3. Sit on the seat and start the engine. Rise from
the seat and move the PTO lever to On. The
PTO should not engage. If the PTO engages,
there is a malfunction in the interlock system
that should be corrected before beginning
operation.
4. Sit on the seat, engage the parking brake and
start the engine. Move the traction pedal out
of the neutral position. The engine should
kill. If the engine does not kill, there is a
malfunction in the interlock system that should
be corrected before beginning operation.
5. Sit on the seat, start the engine and set speed
range to low. Move PTO switch forward to
engage cutting units.
Important: The center lift lever must
momentarily be pushed to the lower
position to enable PTO circuit actuation
by PTO switch.
• Raise either wing cutting unit to the transport
position. The cutting unit should turn off.
If the cutting unit does not stop, there is a
malfunction in the interlock system that should
be corrected before resuming operation.
• If the cutting unit is lowered again the motor
should re-start. If the cutting unit does not
re-start, there is a malfunction in the interlock
system that should be corrected before
resuming operation.
• Raise the center cutting unit to the transport
position. All the cutting units should stop
running and not re-engage when lowered to the
ground. If the cutting unit does not stop when
it is raised or if it re-starts when it is lowered,
there is a malfunction in the interlock system
that should be corrected before resuming
operation.
• With the cutting units engaged, switch the
speed range from low to high. The cutting
units should stop. If the cutting units do not
stop, there is a malfunction in the interlock
system that should be corrected before
resuming operation.
• If the operator rises from the seat with the
cutting units engaged and/or the traction pedal
out of neutral, the cutting units must stop in
approximately one second and engine must
shutdown in approximately two seconds. If
the cutting units do not stop and the engine
does not shutdown, there is a malfunction in
the interlock system that should be corrected
before resuming operation.
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