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 TM 5-4120-393-14
5-4. Evaporator Fan Motors (B3A and B3B) (Keco Industries Model) (cont)
e.
Remove tags.
f.
Secure cable clamp (2).
3.
To replace thermal protector:
a.
Using screwdriver, remove two screws (3) from cover (4).
b.
Remove cover (4).
c.
Pull thermostat (5) away from motor.
d.
Tag and disconnect leads to the thermostat (5).
e.
Remove old thermostat (5).
f.
See tags and connect leads to new thermostat (5).
g.
Remove tags.
h.
Position thermostat.
i.
Using screwdriver, secure cover (4) with two screws (3).
4.
To replace bearings:
a.
Match-mark motor frame (6) and both end shield assemblies (7) and (8) to ease reassembly.
b. Using screwdriver and wrench, remove four screws (9), nuts (10), and lock washers (11) from each end shield
assembly.
c. Carefully separate end shields (7) and (8) from motor frame (6). Use a brass or plastic bar and hammer and tap
end shields away from motor frame. Tap opposite sides, top, and bottom in alternating sequence to break end shields
loose.
d.
Remove end shield assemblies.
5-5
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