TM 9-4940-568-34
2-13
Table 2-5. Starter Motor Troubleshooting (CONT).
Malfunction
Test or Inspection
Corrective Action
5. LOW SPEED WITH HIGH CURRENT.
Excessive friction in bearing(s) or gear reduction unit, bent armature shaft or loose pole shoe, bent drive shaft.
Inspect bearings, armature, drive shaft and gear reduction gears (Para 5-23).
Shorted armature.
Inspect and test armature (Para 5-23).
Grounded armature or fields.
Inspect and test frame and field coil assembly and armature (Para 5-23).
6. LOW SPEED WITH NORMAL (OR LOW) CURRENT.
High internal electrical resistance caused by poor connections, defective leads or dirty commutator.
Inspect internal wiring, electrical connections and armature commutator (Para 5-23).
Causes listed under “Failure To Operate With Very Low Or No Current”, Malfunction 3.
Corrections listed under “Failure To Operate With Very Low Or No Current”,
Malfunction 3.
7. HIGH SPEED WITH HIGH CURRENT.
Shorted fields.
Inspect and test field and frame assembly (Para 5-23).
