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ELECTRIC MOTOR REPAIR - continued - TM-5-4120-347-140123
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TM-5-4120-347-14 Air Conditioner Horizontal Compact 9 000 BTU/HR 208 Volt 3 Phase 60 Hertz Manual
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DISCHARGING THE REFRIGERANT SYSTEM - TM-5-4120-347-140125
TM5-4120-347-14
(l) Insert screws through holes in both brackets and tighten finger-tight.
(m) Tap around both brackets with a plastic or rawhide mallet while tightening screws. Tighten in 1-2
turn increments in alternating sequence until all the screws are equally tightened. Check for freedom of
rotation by turning the motor shaft by hand. There should be no drag or binding.
(n) Check end-play of shaft. End play should be 0.002-0.005 inch (0.051-0.127 mm), If end-play is not
within limits, disassemble motor and add or remove washers to adjust,
c. For further information on electric motor repair, refer to FM 20-31 (Electric Motor and Generator Repair).
REFRIGERATION SYSTEM REPAIRS GENERAL
The refrigeration system must be totally discharged before any maintenance action is performed on any
system component. Leak testing and dehydrator replacement is required after any system component has been
removed and replaced. The system must be evacuated before it is charged, The system must be properly
charged to function properly.
DANGEROUS CHEMICAL
is used in this equipment.
DEATH
Death or severe damage may result if personnel fail to observe safety precautions. Use great care to avoid
contact with liquid refrigerant gas being discharged under pressure. Sudden and irreversible tissue damage
can result from freezing. Wear thermal protective gloves and a face protector or goggles in any situation where
skin-eye contact is possible.
Prevent contact of refrigerant gas with flame or hot surfaces, Heat causes the refrigerant to break down and
form carbonyl chloride (phosgene), a highly toxic and corrosive gas.
REFRIGERANT UNDER PRESSURE is used in the operation of this equipment.
DEATH
Death or severe injury may result if you fail to observe safety precautions.
Never use a heating torch on any part that contains Refrigerant R-22. Do not let refrigerant touch you, and do
not inhale refrigerant gas.
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