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7-3
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Table of Contents-
IndexVisual Inspection
CHECK COMPRESSOR
CLUTCH BRACKET &
MOUNTING BOLT
TENSION
CHECK COMPRESSOR
SHAFT SEAL AREA
FOR LEAKS (OIL)
CLEAN SIGHT GLASS
FOR VISUAL INSPECTION
CLEAN CONDENSER,
STRAIGHTEN FINS
CHECK BELT &
PULLEY ALIGNMENT
AND TENSION
CHECK ALL FITTINGS
& BENDS IN LINES FOR
LEAKS OR DAMAGE
A. Condenser
– Is it free of leaves, bugs, bird feathers or mud? The
condenser must be relatively clean to work well as a heat exchanger.
How you clean the condenser depends on where it is mounted. The
condenser fin comb, air hose and nozzle, or soap and water may be
used. Where possible, check condenser mounting bolts or screws and
tighten them if necessary.
Condenser failure often results from loose hoses. Hose movement
will cause fatigue failure of condenser tubing adjacent to the fittings.
Make sure the hoses are securely clamped.
While inspecting the condenser check the receiver-drier sight
glass and connections. Look to see if the sight glass has a moisture
indicator that is showing moisture in the system.
B. Components Under the Hood
– Tip the cab or raise the hood.
Look at the compressor mounting bracket, compressor clutch assem-
bly, drive belt and pulley alignment. The mounting bracket, com-
pressor, clutch and drive pulley should be fastened securely, and a
clutch groove (there may be two groves) should be in line with the
drive pulley. Tighten all bolts shown in Figure 7-3, as you inspect.
Figure 7-2
This system illustration
notes the main points for
visual inspection.
Figure 7-3
Engine and compressor
vibration can work mount-
ing bolts loose. Tighten all
mounting bolts as you in-
spect the system. Slots in
the mounting bracket are
used to move the compres-
sor clutch assembly in order
to adjust belt tension or
alignment.