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Page Title:
CONDENSER FAN AND HOUSING AND MOTOR-Continued. |
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 TM 5-4120-386-14
4-34. CONDENSER FAN AND HOUSING AND MOTOR-Continued.
REMARKS
LOCATION/ITEM
ACTION
disassembly
a.
Remove three screws (5) and
three flat washers (6) from
inlet ring (7) and remove inlet
ring from scroll.
b.
Remove impeller gently from
scroll. (Do not force. )
Install impeller (8)
Assembly
a.
in scroll (10).
b.
Secure inlet ring (7)
with three screws (5)
and three flat washers
(6).
Replace de-
Inspect exterior case of
Test
a.
fective motor.
motor for cracks, dents,
oil, evidence of overheat-
ing any other abnormalities.
b.
Turn motor shaft by hand and
listen for clicking sounds
that indicate bad bearings.
Report condition to direct
support maintenance personnel.
If the shaft cannot be rotated,
c.
the bearings may have seized.
d.
Test the thrust bearings by
attempting to push and pull
the motor shaft axially.
Report condition to direct
support maintenance personnel.
See paragraph
If end play is excessive
e.
(i.e. can be felt on manual
push-pull), the thrust bear-
ings and shims are worn beyond
limits and should be replaced.
See Wiring
f.
Use an ohmmeter or continuity
Diagrams.
tester to check continuity
(Figures E-1
between pins of the electrical
and E-2)
connector (P5).
Check resistance (8 to 12 ohms)
g.
between connector pins A
and B and (0.6 to 1.0 ohms)
Replace motor
between E and D. This means
if either open
that open circuits do not
or short cir-
exist.
cuits exist.
4-95
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