Figure 3-87. Removing armature from stator.

Figure 3-89. Removing shims.

(1) Check armature for shorts by placing it on

a "growler" and with a steel strip or a hacksaw blade held

on armature core, rotate armature. If blade vibrates,

armature is shorted in area of the core below the

vibrating blade. Copper or brush dust in slots between

Figure 3-87. Removing armature from stator.

commutator bars sometimes cause shorts which can be

eliminated by cleaning out slots. Shorts at crossovers of

coils at core end can often be eliminated by bending wire

slightly and re-insulating exposed bare wire. If short

cannot be eliminated, armature must be replaced.

(2) To test armature for grounds, place one

probe of test lamp on armature core or shaft and place

other probe on each commutator bar in turn.

Figure 3-88. Removing bearing retainer.

3-99