TM 5-3895-373-34
C.
INSPECT - Continued.
4.
INSPECT SLEEVE BEARING (46) FOR SCORING
AND DAMAGE. REPLACE SLEEVE BEARING IF
DAMAGE OR SCORING IS DETECTED. REFER
TO REMOVE AND REPLACE SLEEVE BEARING
IN DRIVE HOUSING (29), IN STEP D.
5.
INSPECT BEARINGS ON DRIVE SHAFT AND
ARMATURE.
a.
Slowly turn bearing (47) on drive shaft (45) and
bearings (48 and 49) on armature (12) by hand.
b.
Check for binding and the feel of flat spots while
turning bearings.
c.
Replace damaged or worn bearings. Refer to
steps D.2 and D.3.
6.
INSPECT
ARMATURE
FOR
DAMAGED
TEETH, WORN COMMUTATOR, AND
ROUGH COMMUTATOR SURFACE.
a.
Inspect armature (12) surface E for broken gear
teeth, step wear, and root interference on gear
teeth.
b.
Use an outside micrometer (Item 16, Appendix
D) to measure commutator outer diameter
surface F.
c.
If commutator outer diameter is less than 1.378
in.
(35 mm)
or if undercut depth at any point is less
than 0.008 in. (0, 2 mm), replace armature (12).
d.
Feel for roughness on commutator surface F.
Refer to step D.4 if commutator feels rough.
7.
INSPECT DRIVE SHAFT (45) FOR SCORING,
DAMAGE, BROKEN OR DAMAGED INTERNAL
GEAR TEETH, AND SPLINE DAMAGE. REPLACE
DRIVE SHAFT IF SCORED, DAMAGED, OR IF
GEAR TEETH OR SPLINE IS DAMAGED.
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