Electrical (Rev 1/97)
106
Check Field Coil
b. Check the stator insulation with an ohmmeter set
on the RX1000 scale. There should be infinite
resistance between the stator lead and the stator
frame. Replace the stator if there is any continuity
between the stator lead and the stator frame.
Check Stator Insulation
3. Check the armature.
a.
To check the bearings, turn them by hand. Replace
the bearings if they are rough or seem loose.
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b. Visually check the armature. Replace the armature
if there is any sign of thrown solder, discolored
windings, bubbled insulation, burned or damaged
commutator bars, or damaged shafts.
c.
Place the armature in a lath and check the commu-
tator and the core with a dial indicator. The distor-
tion, run out, or out of round should not exceed
.015 in. (0.40 mm).
Check Armature Distortion
Clean Up Commutator
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