TM-5-4310-389-14
4-21. STARTING MOTOR.
DESCRIPTION
This task covers: Repair. Test.
INITIAL SETUP
Tools:
Equipment condition:
General Mechanic Tool Kit
Engine secured (paragraph 2-11)
Starter removed from
Materials/parts:
engine (paragraph 3-34)
Grease MIL-G-21164, item 20 Appendix E
REPAIR
NOTE
Two tests should be performed on the starter motor before repairs are made. These tests will help
determine what repairs will be necessary during starter motor over haul. The two tests are a no-load
test and a locked rotor test.
TEST
a.
No-Load Test.
1.
Remove starter motor with solenoid from engine.
2.
Check armature for freedom of operation by turning pinion.
a)
Tight, dirty, or worn bearings, bent armature shaft, or loose pole shoe screws will cause armature to drag. If
armature does not turn freely, do not perform no-load test. Disassemble motor and repair.
b)
If armature does operate freely, proceed with no-load test.
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