TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
Page 363 of 1258
6-5. 200 AMPERE ALTERNATOR (12338796-1) TESTING AND REPAIR This task covers: a. Alternator Output Testing d. Cleaning b. Disassembly e. Assembly c. Static Testing a. Alternator Output Testing 1. Mount pivot arm of 500 amp test stand to high speed side and screw mounting flange adapter to pivot arm. Connect pulley drive shaft to high speed head. Screw pulley drive shaft to mounting flange adapter. 2. Mount alternator to starter/alternator mounting bracket on 500 amp test stand. Connect “V” belt from 500 amp test stand pulley to alternator pulley. Adjust belt tension. 3. Connect cable from alternator ground terminal to 500 amp test stand “G-” terminal. Connect cable from alternator “Bat” terminal to 500 amp test stand “G+” terminal. Connect cable from alternator regulator “IGN” to 500 amp test stand “F” terminal. 4. Make a jumper wire with a ring terminal at both ends. Connect jumper wire on 500 amp test stand from IGN SWITCH terminal to “F-B” terminal. 5. Set 500 amp test stand as follows: Model GSAR-500 Model AGT -99A (a) DC ammeter load and starter selector X10 500 amp (b) DC ammeter field and battery charge selector X1 5 amp (c) Field circuit switch Regulator Regulator (d) DC voltmeter circuit selector RECT/GEN RECT/GEN 6. Turn 500 amp test stand master power switch and master load switch to “ON” and battery switch to 24V DC. Green lamp on 500 amp test stand must illuminate. INITIAL SETUP: Applicable Models _______________ M996, M996A1, M997, M997A1, M997A2 Tools ____ General mechanic's tool kit: automotive (Appendix G, Item 1) Puller (Appendix G, Item 136) Test Equipment _____________ Multimeter (Appendix G, Item 120) Test stand (Appendix G, Item 94) Materials/Parts ____________ Sealing Compound (Appendix B, Item 57) Sealant (Appendix B, Item 43) Locknut (Appendix E, Item 63) Eighteen locknuts (Appendix E, Item 64) Three lockwashers (Appendix E, Item 87) Twelve locknuts (Appendix E, Item 65) Personnel Required ________________ One mechanic One assistant Manual References ________________ TM 9-2320-280-20 TM 9-2320-280-24P TM 9-4910-663-12 TM 9-4910-485-12 Equipment Condition _________________ Alternator removed (TM 9-2320-280-20). General Safety Instructions ______________________ Always support alternator core and shaft assembly during removal and installation. Maintenance Level _______________ Direct support TM 9-2320-280-34 6-38 Change 1 NOTE Prior to operation of the test stand, make certain that all switches and controls are in the “initial” positions as referenced in: Operator and Maintenance Manual, TM 9-4910-663-12 (UMC Model GSAR-500), or Operator and Maintenance Manual, TM 9- 4910-485-12 (Sun Model AGT-99A).