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MAINTENANCE
SERVICE PROCEDURE
CHECK AIR CONDITIONER
(Machine equipped with cab) (If equipped)
CHECK LEVEL OF REFRIGERANT (GAS)
WARNING
If the refrigerant used in the air conditioner gets into your eyes or on your
hands, it may cause loss of sight or frostbite. Do not touch the refrigerant.
Never loosen any part of the refrigerant circuit.
Do not bring any flame close to any point where the refrigerant gas is
leaking.
If there is a lack of refrigerant (gas), the cooling performance will be
poor. When operating the air conditioner at high speed with the
engine at full throttle, use the receiver sight glass (inspection
window) to check the condition of the refrigerant gas (R134a)
flowing in the refrigerant circuit.
No bubbles in refrigerant flow: Suitable
Some bubbles in flow
(bubbles pass continuously): Lack of refrigerant
Colorless, transparent: No refrigerant
REMARK
When there are bubbles, the refrigerant gas level is low, so contact your Komatsu distributors to have refrigerant
added. If the air conditioner is run with the refrigerant gas level low, it will cause damage to the compressor.
OPERATING THE AIR CONDITIONER OFF-SEASON
Even during the off-season, operate the air conditioner for 3 to 5 minutes once a month to maintain the oil film at all
parts of the compressor.
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