4-2. ALTERNATOR TESTING AND REPAIR (ALL EXCEPT M1010)

CHAPTER 4 ELECTRICAL SYSTEMS MAINTENANCE

4-2. ALTERNATOR TESTING AND REPAIR (ALL EXCEPT M1010) (Cont) - TM-9-2320-289-34_263

/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual
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TM 9-2320-289-34 4-2. ALTERNATOR TESTING AND REPAIR (ALL EXCEPT M1010). This task covers: a. Alternator Output Testing d. Component Testing b. Disassembly e. Assembly c. Cleaning and Inspection INITIAL SETUP: Materials/Parts Too/s/Test Equipment One generator positive (+) terminal l package l One generator negative (-) terminal l package l One generator relay terminal package l Crocus cloth (Item 18, Appendix B) 500 amp test stand Belt tensioning gage Multimeter Test light Torque wrench Dry cleaning solvent (lterm 23, Appendix B) Manual References Grease (Item 36, Appendix B) l TM 9-214 Masking tape (Item 68, Appendix B) Insulating varnish (Item 71, Appendix B) General Safety Instructions • Compressed air used for cleaning purposes should never exceed 30 psi (207 kPa). l Dry cleaning solvent is flammable and must not be used near open flame. Use only in a well-ventilated area. a. ALTERNATOR OUTPUT TESTING 1. 2. 3. 4. 5. 6. 4 - 2 Mount pivot arm of 500 amp test stand to high speed side, and screw mounting flange adapter to pivot arm, Connect pulley drive shaft with shaft of high speed head. Screw pulley drive shaft to mounting flange adapter, Mount alternator to generator/starter mounting bracket on 500 amp test stand. Connect “ V“ belt from 500 amp test stand pulley to alternator pulley. Adjust belt tension, (See Appendix D) Connect cable from alternator “ BAT” terminal to 500 amp test stand “G+” terminal, Connect cable from alternator ground terminal to 500 amp test stand “G-” terminal, Make a jumper wire with an insulated female spade terminal on one end and ring terminal on other end. Jump wire from alternator “ NO. 2” terminal to alternator “ BAT” terminal. Using test light, connect one probe to alternator “ BAT” terminal and other probe to alternator “ NO, 1“ terminal. Set 500 amp test stand as follows: (a) (b) (c) (d) (e) DC ammeter switch to “x10” DC voltmeter range switch to “x2” DC voltmeter select switch to “ BAT” Tachometer switch to “ DIRECT DRIVE” Battery switch and master load switch to “OFF” Change 2

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