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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.
The machine has interlock switches in the electrical
system. These switches are designed to stop the engine
when the 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.
Pushing or Towing the
Machine
In an emergency, the machine can be moved forward by
actuating the bypass valve in the variable displacement
hydraulic pump and pushing or towing the machine.
Do not push or tow the machine for more than 1/4
mile (0.4 km).
Important: Do not push or tow the machine
faster than 2-3 MPH (3-4.8 km/h) because internal
transmission damage may occur. The bypass valve
must be open whenever the machine is pushed or
towed.
1. Raise the seat and remove the battery cover. The
bypass valve is located in front of the battery
(Figure 28).
2. Rotate the valve 90 degrees (1/4 turn) in either
direction to open and allow oil to bypass internally.
Because fluid is bypassed, the machine can be slowly
moved without damaging the transmission.
28
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