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OPERATION
PREVENTION METHOD OF ENTRY OF DUST
Entry of dust into the cab can be prevented by starting the blower fan for the air conditioner to raise the pressure in
the cab a little higher than outside.
When working in a dusty job site or when preventing dust from entering the cab, use this function.
Close the windows and doors.
Set lever (1) to the FRESH position.
Set switch (2) to any of positions 1, 2, or 3.
Set switch (3) to the desired position.
Set lever (4) to the desired position.
PRECAUTION WHEN USING AIR CONDITIONER
CARRY OUT VENTILATION FROM TIME TO TIME WHEN USING THE COOLER.
If you smoke when the cooler is on, the smoke may start to hurt your eyes, so turn the lever to FRESH to
remove the smoke while continuing the cooling.
When the air conditioner is used for long periods, carry out ventilation once every hour.
BE CAREFUL NOT TO MAKE THE TEMPERATURE IN THE CAB TO LOW.
When the cooler is on, set the temperature so that it feels slightly cool when entering the cab (5 to 6ºC lower
than the outside temperature). This temperature difference is considered to the most suitable for your health,
so always be careful to adjust the temperature properly.
DIRECTION OF VENTS WHEN COOLING
If the vents (left and right) in the middle of the dashboard are turned so that cold air plays directly on the cab
door glass, moisture may condense on the outside of the cab door glass and reduce the visibility. (This occurs
particularly in high temperatures.)
If this happens, turn the vent fully to the rear and raise the air conditioner temperature setting slightly.
INSPECTION DURING OFF-SEASON
Even during the off-season, run the compressor at low speed for several minutes once a week to prevent the loss
of the oil film at the lubricated parts of the compressor. (Run the engine at low speed and set the temperature con-
trol lever at the central position.)
REMARK
When the ambient temperature is low, if the compressor is suddenly run at high speed, it may cause failure of the
compressor. Note that the system is set so that the compressor will not run when the cooler switch is turned on if
the ambient temperature is less than 2 to 6.5ºC.
EXPLANATION OF COMPONENTS
3-37
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