TM 9-2320-387-24-2
18-4.
STARTER REPAIR (Cont’d)
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Clean all starter motor components in accordance with para. 2-14.
1.
2.
3.
4.
5.
6.
7.
8.
9.
NOTE
For general inspection instructions, refer to para. 2-15.
Inspect clutch (7) for damage, roughness, or damaged pinion. Replace clutch (7) if defective.
Check brushes (4) for roughness, galling, and wear. Replace brushes (4) if worn or brush length is
less than 0.375 in. (9.52 mm).
Check the brush springs (5) for loss of spring tension or damage. Replace brush springs (5) if weak
or damaged.
Inspect commutator end head bearing (1) for roughness, galling, or wear. Replace commutator end
head bearing (1) if worn.
Inspect pinion housing bearing (6) for roughness, galling, or wear. Replace pinion housing
bearing (6) if worn.
Check the commutator (10) for damage or evidence of excessive wear or arcing. Inspect the armature
shaft (11) for rough bearing surfaces and rough or damaged splines (8). Turn commutator (10) and
undercut insulation or replace starter motor if damaged.
The armature (91, field coils (3), and brush holder (2) should be checked for shorts, grounds, and
open circuits with armature test set. Replace starter motor if armature (91, field coils (31, or brush
holder (2) is shorted.
Inspect core spring (20) and rubber boot (23) for damage. Replace if damaged.
Inspect contact (15) for bums or damage. Replace if burned or damaged.
1 d. Assembly 1
NOTE
For general assembly instructions, refer to para. 2-17.
1.
Position core shaft (18) in solenoid housing (121, and install washer (131, spring (141, contact (151,
washer (161, and locknut (171 on core shaft (18). Hold core shaft (18) and tighten locknut (17).
2.
Install washer (241, rubber boot (231, spring retainer (191, spring (20), and spring retainer (21) on
core shaft (18) with retaining ring (22).
18-18
