TM-5-4310-389-14
a)
Rated current draw and rpm indicate that starter motor is in normal condition.
Volts 11.3
Amps (min) 70
Amps (max) 130
RPM (min) 5,000
RPM (max) 10,000
b)
Low speed and high current draw indicate the following:
1)
Too much friction - tight, dirty, or worn bearings, bent armature shaft, or loose pole shoes.
2)
Shorted armature. Check armature on megger after disassembly.
3)
Grounded armature.
c)
Failure to operate and high current draw indicate the following:
1)
Direct ground in terminal.
2)
Frozen bearings.
d)
Failure to operate and no current draw indicate the following:
1)
Open armature windings. Inspect armature for badly burned commutator bars after disassembly.
2)
Broken brush springs, worn brushes, high insulation between commutator bars, or other causes
preventing good contact between brushes and commutator.
e)
Low speed and low current draw indicate high internal resistance due to poor connections, defective
leads, and dirty commutator.
5.
When test is complete, and if no further disassembly is required, proceed as follows:
a)
Remove test equipment.
b)
Reinstall motor.
c)
Reconnect battery cables.
d)
Remove OUT-OF-SERVICE tag from control panel.
4-85
