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Page Title:
EVAPORATOR MOTOR-INSPECT/TEST/REPLACE - continued |
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 TM 5-4120-386-14
4-31. EVAPORATOR MOTOR-Continued.
LOCATION/ITEM
REMARKS
ACTION
f.
Use an ohmmeter to check
See Figures
resistance between pins of
E-1 and
the electrical connector (P3).
E-2, Wiring
Diagrams.
The motor is capable of opera-
g.
ting at two speeds; therefore,
there are two sets of field
coils.
h.
Check the resistance between
connector pins A and B and
E and D (33 to 40 ohms).
Resistance reading indi-
cates that no open circuits
exist.
i.
Then check from pin G to pins
A,B,E and D. No continuity
should exist, which indicates
that there is no internal short
circuit. Replace the motor if
either short or open circuits
exist.
Removal
Remove four cap screws and
a.
four lockwashers from
underside of base (40).
Loosen the setscrew (38) on
b.
shaft extension (39) and remove
motor.
Installation
a.
Set the motor on base (40)
with the motor shaft in the
shaft extension (39).
b. Install four cap screws (41)
and four lockwashers (42)
through the underside of the
base to secure the motor.
c. Tighten setscrew (38) of
shaft extension.
d. Place the fan and motor
assembly on resilient mounts
(3 and 4) and install four
screws (5) and four lock
washers (6).
4-82
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