METHOD FOR REPLACING DOOR WIPER
1.
The blade is hooked on portion (A). Move it in the direction
of the arrow.
Remove the blade.
2.
Install a new blade by hooking it on portion (A).
Check that it is hooked securely.
METHOD FOR CHECKING AND MAINTENANCE AIR CONDITIONER
METHOD FOR CHECKING LEVEL OF REFRIGERANT (GAS)
WARNING
• Always handle the refrigerant (gas) according to the local regulations.
• If the refrigerant used in the air conditioner gets into your eyes or is splashed on your hands, it may
cause loss of sight or frostbite. Never touch the refrigerant. Do not loosen any part of the refrigerant
circuit.
• Do not bring open flame close to a refrigerant leaking point.
If the level of the refrigerant (gas) is low, the cooling effect will be reduced. Perform while running the engine at
high idle and operating the air conditioner at high speed.
Check the condition of the refrigerant gas (Hydrofluorocarbons
HFC -134a) that circulates the refrigerant circuit, through sight
glass (2) (inspection window) of receiver (1).
(A) No bubbles in refrigerant flow: Suitable
(B) Some bubbles in refrigerant flow: In sufficient (bubbles pass
continuously)
(C) Colorless, transparent: No refrigerant
REMARK
When there are bubbles, the refrigerant gas is insufficient. In this case, ask your Komatsu distributor to add re-
frigerant. If the air conditioner is run with the refrigerant gas level low, it will cause damage to the compressor.
Use Hydrofluorocarbons HFC -134a as refrigerant.
MAINTENANCE MAINTENANCE PROCEDURE
4-39
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