Inspect the refrigerant level using the sight
glass (2) on the top of the receiver drier (1).
2. Inspect under the following conditions:
• Cab door .............Fully open
• Temperature control dial
Fully to the COOL side
• Air strength ..........High
• Engine speed ......1500 rpm
• Air conditioner .....On
3. Inspect by watching the flow of air bubbles
in the refrigerant through the sight glass
(2). Refer to page 190, “Condition of the
refrigerant.”
CAUTION
The high pressure pipe becomes hot [80
to 120°C (176 to 248°F)], so be careful
not to burn yourself when inspecting the
refrigerant level.
4. Open the radiator.
Refer to page 125, “Inspecting and
Adjusting the Fan Belt.”
5. Also check the temperature of the
compressor’s high pressure pipe (1) and
low pressure pipe (2). Refer to page 184,
“Condition of the refrigerant.”
Off-Season Inspection
Even off-season, run the cooler for 3 to 5
minutes at least once a week to maintain oil
in the various parts of the compressor.
Air Conditioner < CTL55 >
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