TM 9-4120-370-14
TO 35E9-229-1
5-5.
CONDENSER FAN MOTOR (62) REPAIR - Continued.
-
(c) Carefully separate end brackets from motor frame. Use a brass or plastic bar and hammer and tap
end brackets away from motor frame, Tap opposite sides, top, and bottom in alternating sequence
to break end brackets loose,
(d) Remove end brackets.
-
(e) Press out or carefully drive bearing out of front end bracket. Remove spacer washers and bearing
loading springs for use at reassembly if they are not damaged, They should be replaced if they are
broken, nicked, or worn.
Using screwdriver, remove four screws and two bearing retainers from rear end bracket.
(f)
(g) Remove bearing from rear end bracket.
(h) Examine rotor, stator, and shafts for nicks, gouges, deformations, and evidence of overheating.
(i)
Dress high metal defects in shafts with a fine file or stone. If rotor or stator are beyond repair, replace
motor.
Coat shaft surfaces with oil (MILL-2104, Grade 20), or equal.
(j)
(k) Coat the bearing cavity of each end bell with oil (M ILL2104, Grade 20) or equal and insert spacer
washers, loading springs, and bearings in same locations as removed in step (e) above.
(l) Insert bearing in rear end bracket and secure it with four screws and two bearing retainer halves.
(m) Carefully work end brackets onto shaft ends keeping the matchmarks made at time of disassembly
in alinement.
(n) Check that a nut is in place on the end of each stud.
(o) Using a wrench and vice grips or pliers, retain studs and evenly tighten the nuts onto stud ends. Before
final tightening, check for freedom of rotation by turning shaft by hand, There should be no drag or
binding. Adjust as necessary and tighten screws. Check again for binding and drag.
(P) Check endplay of shaft. End-play should be 0.0020.005 inch (0,0510.127 mm). [fend-play is not
within limits, disassemble motor and add or remove shims to adjust,
Followon procedure:
Install motor. (See para 464.)
REFRIGERATION SYSTEM REPAIRS GENERAL
The refrigeration system must be totally discharged before any maintenance action that requires opening of the pressur-
ized system. Leak testing and dehydrator replacement are 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
(R22)
is used in this equipment.
DEATH
or severe damage may result if personnel fail to observe safety precautions, Use
great care to avoid contact with liquid refrigerant or refrigerant gas being dis-
charged 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 poisonous and corrosive gas.
