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Do not clean overrunning clutch in solvent or other cleaning solution.
Washing clutch will remove grease which may result in premature fail-
ure of the clutch.
a.
Wipe all metallic parts with a cleaning cloth (TX-1250) that has been slightly dampened with cleaning solvent.
b.
Inspect all parts for damaged threads, cracks, distortion, or other visible damage.
c.
Inspect armature commutator. If commutator is dirty or discolored, clean with abrasive paper (#400). Use
compressed air to blow sand out from between commutator segments.
d.
Inspect commutator for pits, scoring, excessive carbon, and oil. Turn armature commutator in a lathe to re-
move surface pits, scoring, and contamination. Normal diameter is 1.89 in. (48.0 mm), minimum after turning
is 1.77 in. (45.0 mm). Maximum runout should be 0.016 in. (0.4 mm) Total Indicator Reading (TIR).
e.
Clean around brushes and holders by wiping off all brush dust and dirt. If brushes are shorter than 0.45 in.
(11.5 mm) they should be replaced.
f.
Check for free movement of brushes. Brushes should move freely when placed in brush holders. Replace
brush springs if weak or worn.
Inspect brush holders for discoloration, burrs, or signs of high temperature indicating defective insulators.
g.
Replace brush holder.
h.
Inspect armature shaft for damage and wear. Replace armature if damaged.
If pinion gear is worn or damaged, inspect flywheel ring gear also.
i.
Inspect armature shaft gear, bearings, and pinion gear for wear or damage. Replace any part that is damaged.
NOTE
ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
3-91
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