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3. Inspect all air, oil, and coolant lines and fittings before
reconnecting them to the compressor. Make certain
o-ring seals are in good or new condition, the threads
are clean, and the fittings are free of corrosion. Replace
as necessary.
4. Install the discharge, inlet, coolant and governor
adapter fittings, if applicable, in the same position on
the compressor noted and marked during disassembly.
See the Torque Specifications for various fitting sizes
and types of thread at the rear of this manual.
Tighten
all hose clamps.
5. Before returning the vehicle to service, perform
the Operation and Leakage Tests specified in this
manual. Pay particular attention to all lines and hoses
disconnected during the maintenance and check for
air, oil, and coolant leaks at compressor connections.
Also check for noisy operation.
TESTING THE REBUILT COMPRESSOR
In order to properly test a compressor under operating
conditions, a test rack for correct mounting, cooling,
lubricating, and driving the compressor is necessary. Such
tests are not compulsory if the unit has been carefully
rebuilt by an experienced person. A compressor efficiency
or build-up test — which is not too difficult — can be run. An
engine lubricated compressor must be connected to an
oil supply line of at least 15 psi pressure during the test:
an oil return line must be installed to keep the crankcase
drained. Connect to the compressor discharge port to a
reservoir with a volume of 1,500 cubic inches, including
the volume of the connecting line. With the compressor
operating at 2,100 RPM, the time required to raise the
reservoir(s) pressure from 85 psi to 100 psi should not
exceed 5 seconds. During this test, the compressor should
be checked for gasket leakage and noisy operation, as
well as unloader operation and leakage. If the compressor
functions as indicated, reinstall on the vehicle connecting
all lines as marked in the disassembly procedure.
