5-47
MAINTENANCE
EVERY 250 HOURS
INSPECTING THE REFRIGERANT (GAS)
LEVEL (AC)
The cooling capacity decreases if the
amount of refrigerant is insufficient.
Inspect the refrigerant level using the sight
glass (2) on the top of the receiver dryer .
1. Open the left side cover.
2. Inspect the places for the conditions
below.
Places for inspection
Conditions
Cab door Fully open
Temperature control
dial
Set fully to the COOL
side
Fan speed High
Ventilation/circulation Circulation
Engine speed Maximum speed
Air conditioner
switch
ON
3. Inspect the refrigerant by watching the flow
of air bubbles through the sight glass (2).
Refer to “Check list for refrigerant volume”
on page 5-48.
4. Open the engine food.
5. Check the temperature of the
compressor’s high pressure pipe (1) and
low pressure pipe (2).
Refer to “Check list for refrigerant volume”
on page 5-48.
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