III-70
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 connec-
tions. 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 assembly, drive belt and pulley
alignment. The mounting bracket, compressor, 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.
Visual Inspection
Figure 7-3
Engine and compressor
vibration can work mount-
ing bolts loose. Tighten
all mounting bolts as you
inspect the system. Slots in
the mounting bracket are
used to move the compressor
clutch assembly in order to
adjust belt tension or align-
ment.
Figure 7-2
This system illustration
notes the main points for
visual inspection.
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