Figure 10-8.--Marking a motor frame and end bell.
Figure 10-7.--Measuring brush tension.
parts as you dismantle them. Store them in an
orderly arrangement in a safe place. Note the
necessary information so you will have no trouble
in reassembly.
Follow these simple steps when disassembling
a motor or generator. Make sure you mark the
frame and mating end bells (fig. 10-8); use a
different mark for each end. When separating the
end bells from the frame, use a mallet or block
of wood with a hammer (fig. 10-9). Never pry
mating surfaces apart with a metal object such
as a screwdriver. Protect the windings, when
necessary, by inserting thin strips of waxed paper
between the rotor and the stator when the rotor
is not supported.
When removing bearings, you can use an
arbor press if you take proper precautions. Place
a pair of flat steel blocks under the inner ring or
Figure 10-9.--Parting end bells with a hammer and wood
block.
both rings of the bearing. Never place blocks
under the outer ring only. You may use a gear
puller to remove a rotor bearing. However, be
CIRCUIT BREAKER
careful.
MAINTENANCE
Clean the end bells with a brush and an
approved solvent. Check them for cracks, burrs,
The circuit breakers (CBs) require careful
nicks, excessive paint, and dirt.
inspection and cleaning following the MRC, the
10-9
