Precaution When Using Air Conditioner; Set So That Cold Air Does Not Directly Blow Onto The Glass Surface; Inspection During Off-Season; Procedure For Replacing Receiver - Komatsu Galeo D61EX-15 Operation & Maintenance Manual

OPERATION

PRECAUTION WHEN USING AIR CONDITIONER

PRECAUTION WHEN USING COOLING OPERATION
q If you smoke when using the air conditioner, your eyes may start to itch or burn. Ventilate the cab ever so often
to remove the smoke.
q When using the air conditioner for a long period of time, carry out ventilation process at least once every hour.
When using the air conditioner, it is recommended for health reasons, that it should only feel slightly cooler (5 or
6°C (9 or 10.8°F) lower than the outside temperature) when you enter the cab.
Therefore, adjust the temperature to a suitable level.

SET SO THAT COLD AIR DOES NOT DIRECTLY BLOW ONTO THE GLASS SURFACE

q 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, close the louvers of the vent and change the direction to prevent the cold air from playing
directly on the surface of the glas

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 6.5°C (35.6 to 43.7°F).

PROCEDURE FOR REPLACING RECEIVER

Replace the receiver once every two years.
After replacing the receiver, add compressor oil. Turn the receiver at an angle and measure the oil remaining
inside the receiver, then add the same amount of oil (Denso Oil 6) to fill the receiver.
REMARK
The replacement interval may become shorter depending on the conditions during use.
If the receiver is used when the moisture absorption limit of the desiccant has been exceeded, the refrigerant cir-
cuit may become blocked and cause the compressor to break down.
PRECAUTIONS WHEN REPLACING RECEIVER
q If the receiver is left for more than 15 minutes with the blind cover removed, the moisture in the air will be
absorbed, and this will reduce the life of the desiccant. If you remove the blind cover, connect the piping
quickly, evacuate the system and fill with refrigerant.
q When removing the refrigerant from the refrigerant circuit, release it gradually from the low pressure side to
prevent oil from flowing out.

CHECK COMPRESSOR BELT TENSION AND REFRIGERANT (GAS) LEVEL

If the compressor belt is loose, or the refrigerant level is low, cooling is not carried out efficiently.
For details, see "WHEN REQUIRED (4-19)".
EXPLANATION OF COMPONENTS
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