TM-9-2920-258-30&P Technical and Parts Manual for 5520AB Generator Download
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TM 9-2920-258-30&P 10 Using a multimeter, place the red lead on terminal “ac” and ground the black lead. Check for 12- 16 volts AC. 11 If the Alternator meets the above requirements, it is serviceable. e Test Stand Shutdown 1 Turn the field current (0-30 amps) counterclockwise. 2 Turn the battery select switch to the OFF position. 3 Turn the master load switch to the OFF position. 4 Turn the speed control clockwise and reduce speed to 1000 rpm. 5 Depress the STOP button. 6 Return ail switches to the base setting. D-3 Testing Procedure With Regulator Refer to TM 9-4910-663-12 for test stand general preparation and operation procedures. Use the following information for testing procedures specific to the 180 ampere Alternator (ref Figure D-4). a Preparation 1 Connect the test cable to the Alternator. 2 Mount the Alternator on the test stand. 3 Set the controls and switches of the test stand to the base setting. The base setting is as follows: A DC bad ammeter range switch at X 10. B DC field ammeter range switch at X 6. C Millivottmeter range switch at X 10. D DC voltmeter range switch at X 5. E DC voltmeter select switch in the RECT/GEN position. (NOTE: Select switch position for test stand model 7458-4 set to EXT.) F AC ammeter range switch at X 5. G AC ammeter select switch in the T1 position. H AC voltmeter range switch at X 2. I AC voltmeter select switch in the T1-T2 position. J External field exciter switch (AC system) in the OFF position. K Generator field in the INT GND position. L Polarity reversing switch in the NEG GND position. D-12