Komatsu WA250PT-5H, Operation & Maintenance Manual

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MAINTENANCE
Service procedure
When required
4-33
Check air conditioner 0.
Check level of refrigerant (gas) 0.
WARNING
If the refrigerant used in the cooler 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 refrig-
erant gas is leaking.
If there is a lack of refrigerant (gas), the cooling performance
will be poor. When operating the cooler at high speed with the
engine at full throttle, use the receiver sight glass (inspection
window) to check the condition of the refrigerant gas (Freon
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
A : Suitable
B : Lack of refrigerant
C: No refrigerant (colorless, transparent)
REMARK
When there are bubbles, the refrigerant gas level is low, so contact your refrigerant dealer to have refriger-
ant added. If the air conditioner is run with the refrigerant gas level low, it will cause damage to the com-
pressor.
Operating the air conditioner off season 0.
Even during the off-season, operate the air conditioner for 3 - 5 minutes once a month to maintain the oil film at all
parts of the compressor.
AW35793B-A
B
C
A
Sight glass
Receiver