TM 9-4120-403-14
(b) Bearing or Rotor
(1) Position motor vertically with end bell up (heads of thru bolts accessible).
(2) Match-mark motor stator and endplate (end bell) to ease reassembly.
(3) Remove four thru bolts from end plate (end bell).
(4) Carefully separate end plate (end bell) from motor stator.
(5) Carefully pull rotor shaft from the stator.
CAUTION
Exercise care not to deform fan blades during disassembly, handling, and assembly
CAUTION
Bearings are permanently lubricated and sealed at the time of manufacture. Do not attempt to clean or
relubricate them. Keep bearings in plastic bags or wrap securely in grease-proof paper until needed for
assembly.
(6) Carefully remove bearings.
(7) Examine rotor, stator, and shafts for nicks, gouges, deformations, and evidence of overheating.
(8)
Dress high metal defects in shafts with a fine file or stone. If shaft is beyond repair, repla e rotor and
c
shaft.
(9)
Examine motor stator and front end plate for broken flange, stripped threads, visible damage, shorted
windings (para 4-57) and evidence of overheating. If motor stator is beyond repair, replace motor.
(10) Coat shaft surfaces with oil.
(11) Coat the bearing cavities of end plate (end bell) and front end plate with oil.
(12) Press bearings onto rotor shaft until they bottom against shoulder at both ends.
(13) Install finger spring and bearing guard.
(14) Carefully insert rotor assembly into stator and front end plate. Bearing is a slip-fit into front end plate.
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