Buhler 2180 - Manual (Page 221)

SECTION 3 - LUBRICATION AND MAINTENANCE
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EVERY 300 HOURS
OPERATION 35
CHECK A/C RECEIVER DRIER SIGHT
GLASS AND MOISTURE INDICATOR
Check the sight glass for bubbles and the color of the
moisture indicator when the outside temperature is
21° C (70° F) or warmer.
To check the sight glass:
1. Start engine and run at 2000 RPM.
2. Depress A/C switch, 1.
3. Position temperature switch, 2, full counterclock-
wise and blower switch, 3, full clockwise.
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4. Inspect the sight glass, 1, ten minutes after
depressing the A/C switch. The compressor
must be turning when inspecting the sight glass.
If bubbles are visible in the sight glass or the
moisture indicator, 2, is pink in color, the air
conditioning system should be serviced. Contact
your authorized dealer.
IMPORTANT: Do not allow R-134a refrigerant to
escape into the atmosphere. Your authorized dealer
has the proper handling and recycling equipment to
service the system.
WARNING
The air conditioning system contains environ-
mentally safe R-134a refrigerant. This system is
not compatible with R12 refrigerant. do not use
gauges or test equipment with R12 refrigerant as
damage to the system will result.
CAUTION
Do not attempt to service the air conditioning
system. It is possible to be severely frostbitten or
injured by escaping refrigerant.
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