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 TM9-4120-423-14&P
2
Blind rivet nuts (rivnuts) can be replaced by drilling the old one out with a drill slightly smaller
than the body diameter of the old nut. Then install a new one.
3
Repair of the evaporator fan motor is limited to the replacement of the electrical connector. For
further information on electric motor repair, refer to FM 20-31 (Electric Motor and Generator
Repair).
INSTALLATION
1
Be sure the motor rotation is correct.
2
Carefully slip motor into place.
3
Using socket and ratchet, secure the motor to the base with two each hex head cap screws,
lockwashers, and flat washers.
4
Align impeller setscrew with flat surface on extension shaft.
5
Slip impeller on extension shaft as far as possible and tighten setscrew.
6
Be sure that the direction of rotation arrows on motor and fans agree. Take care that impellers
are not reversed.
7
Using a screwdriver, install inner fan inlet rings to housings with three screws and flat washers.
8
Using screwdriver and wrench, secure the fan housings to the base with sixteen screws and
locknuts.
9
Slip impeller and extension shaft assembly on motor shaft.
10
Check to see that the impellers are located an equal distance between the two walls of the blower
housing.
11
Using allen wrench, tighten the four extension shaft setscrews.
12
Spin the impeller by hand to check for interference.
13
Install the outer fan inlet rings and secure each with three screws and flat washers.
14
Carefully lower the evaporator fan and motor assembly down into the unit and align the holes.
15
Using socket and ratchet, secure with ten each hex head cap screws, lockwashers, and flat
washers.
16
Place the electrical module in position and align the module mounting screws. See WP0032.
0030 00-6
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