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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.
Engine Cooling Fan Operation
The engine cooling fan switch has two positions for
controlling the operation of the fan. The two positions
are R and Auto. The fan has the ability to reverse
to blow debris off of the rear screen. Under normal
operating conditions, the switch will be in the Auto
position. In Auto, the fan speed will be controlled
by the coolant or hydraulic oil temperature and will
automatically reverse to blow debris off of the rear
screen. A reverse cycle is automatically initiated when
either the coolant or hydraulic temperature reaches
a certain point. By pressing the fan switch forward
into the R position, the fan will complete a manually
initiated reverse cycle. It is recommended to reverse the
fan when the rear screen is clogged or prior to entering
the shop or the storage area.
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.
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 31).
2. Rotate the valve 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. Note the position of
the valve when opening or closing.
3. Close the bypass valve before starting the engine.
However, do not exceed 5 to 8 ft-lb (7 to 11 N⋅m)
torque to close the valve.
29
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