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TM-9-2920-258-30&P Technical and Parts Manual for 5520AB Generator Download

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TM 9-2920-258-30&P 5 Inspect rotor assembly as follows: A B C D E 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). 3-11