Inspect rotor assembly

TM 9-2920-258-30&P

Inspect rotor assembly as follows:

Check that rotor shaft (45) is straight and has no burred or stripped threads.

Check that rotor (46) has no grounds by touching one test lead of multimeter to

rotor shaft (45) and the other test lead to one slip ring (47). Ohmmeter reading

must be more than 10,000 ohms. If ohmmeter reading is not more than 10,000

ohms, Alternator is irreparable.

Repeat step B for other slip ring (47).

Check resistance of slip rings (47) by touching test leads of multimeter to each

slip ring. Resistance must be between 1.8-2.0 ohms. If resistance is not within

limits, Alternator is irreparable.

Check runout of slip rings (47) (ref Table 3-1, page 3-13).

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