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ALTERNATOR REPAIR - TM-5-4210-224-14-P0473
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ASSEMBLY - TM-5-4210-224-14-P0475
TM 5-4210-224-14&P
5-9. ALTERNATOR REPAIR (Continued).
TEST
NOTE
Before preforming these tests inspect all parts for wear, cracks, or other mechanical defects.
Replace all damaged parts.
a. Positive Heat Sink Test.
NOTE
The positive heat sink is the one to which positive output terminal is connected. The square
hole in the positive heat sink is larger than the negative heat sink hole.
(1) Connect the positive lead of the test lamp to the positive heat sink and touch the negative test lead to each
of the three diode terminals. The test lamp should not light. If the test lamp lights, the diode is shorted.
(2) Reverse the test leads so that the negative test lead is connected to the positive heat sink. The positive
test lead should now be touched to each diode terminal. If the test lamp fails to light, an open diode is
indicated.
(3) If a shorted or open diode isetected replace the entire heat sink assembly.
d
b. Negative Heat Sink Test.
(1) Connect the negative lead of the test lamp to the negative heat sink and touch the positive test lead to
each of the three diode terminals. The test lamp should not light. If the test lamp lights, the diode is
shorted.
5-17

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