5-14. STARTER REPAIR AND TESTING-Continued
Remove insulator bushing (78) from terminal stud (79).
b. Cleaning and Inspection.
Dry cleaning solvent P-D-680 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
deg. F (38 to 59 deg. C).
Clean all metal parts in dry cleaning solvent (Item 3, Appendix E) except armature, field coil, and
Clean starter drive with clean, dry, lint free cloth (Item 42, Appendix E).
Inspect field frame for cracks, breaks, or other obvious damage.
Inspect armature shaft for rough surfaces or damaged splines.
Inspect commutator contact surface for rough surface, pits, scoring, burns, hard carbon, oil coat,
and out-of-round. Commutator diameter, when new, is approximately 2.3125 to 2.3250 in. (58.74
59.06 mm). Commutator diameter may not be less than 2.000 in. (50.8 mm) when returned to
service. Commutator may not be more than 0.0020 in. (.051 mm) out-of-round.
Check length of brushes. If length is less than 0.50 in. (12.7 mm), replace brushes.
Inspect brush springs for distortion.
Inspect splines and gear teeth on starter drive for damage.
Check bushings for damage or wear. If inside diameter of bushings is more than 0.005 in. (0.127
mm) larger than shaft diameter, replace bushings.
Replace unserviceable parts.