TM 9-4120-388-14
5-21. COMPRESSOR (B1) - Continued.
(8) Lever or tilt the compressor and remove rubber washer and bushing from under each of the four mounting feet.
If compressor burn out is suspected, use care when handling compressor to
avoid touching compressor sludge. Acid in sludge can cause bums. Avoid inhal-
ing fumes from any acid formed by burn-out of oil and refrigerant.
(9) Carefully slide compressor from air conditioner.
(10) Check the compressor to see if a motor burn out is indicated.
f. Compressor motor burn out.
(1) After removal of a bad compressor from the refrigeration system, remove all external tubing and tip the com-
pressor toward the discharge part to drain sample of oil into a clear glass container.
(2) If the oil is clean andclear, and does not have a burnt add smell, the compressor did not fall because of
motor burn out. If a burn out is not indicated, proceed to para. g.
(3) If the oil is black, contains sludge, and has a burnt acid odor, the compressor failed because of motor burn out.
Avoid inhaling fumes and burns from any acid formed by burn out of oil and refrig-
erant. Wear a mask if area is not thoroughly ventilated. Wear protective goggles
or glasses to protect eyes. Wear rubber gloves to protect hands.
(4) You must clean the entire refrigeration system after a burn out has occurred, since contaminants will have
been carried to many corners and restrictions in the piping and fittings. These contaminants will soon mix
with new refrigerant gas and compressor oil to cause repeated burn outs.
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