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TM 5-4320-306-24
3-17. TEST/REPAIR STARTER MOTOR (Continued)
19
Remove retainer (33) from armature (24). Remove stop ring (34), bushings (35), overrunning clutch drive (32),
and intermediate bearing (30) from armature (24).
20
Remove bushing (31) from intermediate bearing (30).
21
Remove bushing (36) from drive end shield (37).
CLEANING/INSPECTION/REPAIR:
WARNING
Dry cleaning solvent P-D-680 (safety or Stoddard's Solvent) is potentially dangerous. Avoid
repeated and prolonged breathing of vapors and skin contact with the liquid. Do not use near
open flame, arcing equipment, or other ignition sources. Always wear eye protection and
protective clothing. The flash point of P-D-680 is 100° to 138 °F (38° to 59°C).
Death or serious injury could occur if compressed air is directed against the skin. Do not use
compressed air for cleaning or drying unless the pressure is/has been reduced to 30 psi (2.11
kgcm2) or less. When working with compressed air always use chip guards, eye protection, and
other personal protective equipment.
1
Clean starter components with P-D-680 solvent and dry with compressed air. When cleaning armature,
excitation winding, and solenoid switch, use soft cloth wet with solvent. Do not soak these components in
solvent. Dry with soft cloth or compressed air.
2
Clean accumulated dirt, carbon, or other foreign material from brush holder, carbon brushes, and other brush
components with P-D-680 solvent. Dry with soft cloth or low pressure compressed air. Inspect for excessive
wear or damage. Inspect commutator end of brushes for dirt, glaze, or other material preventing good electrical
contact with commutator. Replace glazed brushes or brush components that are excessively worn or damaged.
Replace brushes and leads if leads are frayed or broken.
3
Remove dirt and carbon from between commutator bars. Inspect armature and its commutator for excessive
wear, missing bars, or broken solder connections. Replace armature if commutator is excessively worn or has
missing commutator bars. Repair any loose or frayed solder connections at commutator.
4
Rotate armature shaft in bushings to determine if bushings are frozen or excessively worn. Worn bushing will
permit the shaft to be moved sideways. Replace bushings if excessively worn or frozen.
5
Inspect excitation winding and wire to solenoid switch for loose, burned, frayed, or shorted wires.
6
Repair loose connections on excitation winding or solenoid switch if necessary. Replace excitation winding if
frayed, shorted, or damaged.
7
Inspect all other starter components for excessive wear or damage. Replace any worn, damaged, cracked, or
broken components.
3-83
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