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SERVICE PROCEDURE
CHECK REFRIGERANT (GAS) LEVEL
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 the cooling effect is poor, there is probably lack of refrigerant
(gas).
In this case, check sight glass (2) of receiver drier (1) near the left
side of the radiator guard.
Before carrying out inspection, set to the following conditions.
Start the engine and run it at approx. 1,500 rpm.
Turn the air conditioner ON/OFF switch to the ON position.
Set the air flow to the maximum position.
Set the temperature to the lowest position.
Open the doors and windows fully.
Turn the air conditioner switch ON.
If the condition of sight glass (2) is "correct" as shown in the
diagram on the right, the condition is normal. (After the air
conditioner switch is turned ON, a small number of bubbles will be
seen, but after that, the fluid becomes a transparent, milky white
color.)
If the condition of sight glass (2) is "insufficient" as shown in the
diagram on the right, there is lack of refrigerant, so ask your
Komatsu distributor to charge with refrigerant. (After the air
conditioner switch is turned ON, bubbles can be seen
continuously.)
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WARNING
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