TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 238 of 953
4-5.13. (6.5L) 400 AMPERE DUAL VOLTAGE ALTERNATOR (12446760) REPLACEMENT This task covers: a. Removal b. Installation NOTE Prior to removal, tag leads for installation. 1. Position 3/8-in. breaker bar on belt tensioner (4), move tensioner (4) clockwise, and remove drivebelt (1) from power steering pump pulley (3) and alternator pulley (2). 2. Remove nut (5), lockwasher (6), washer (7), ground strap (8), and washer (10) from stud (9). Discard lockwasher (6). WARNING Alternator must be support during removal and installation. Failure to do so may cause injury to personnel or damage to equipment. 3. Remove screw (12), lockwasher (13), and washer (14) from alternator bracket (17) and alternator mounting bracket (11). Discard lockwasher (13). 4. Remove screw (15), washer (16), and bracket (17) from alternator (18) and alternator mounting bracket (11). 5. Remove nut (24), lockwasher (23), washer (22), screw (19), washer (20), and alternator (18) from alternator support bracket (21) and alternator mounting bracket (11). Discard lockwasher (23). 6. Remove alternator pulley (2) (para. 4-3). 1. Install alternator pulley (2) (para. 4-3). 2. Position alternator (18) on alternator mounting bracket (11). 3. Install alternator (18) on alternator mounting bracket (11) and alternator support bracket (21) with washer (20), screw (19), washer (22), lockwasher (23), and nut (24). Do not tighten nut (24). 4. Install alternator bracket (17) on alternator mounting bracket (11) and alternator (18) with washer (16) and screw (15). Do not tighten screw (15). 5. Install washer (14), lockwasher (13), and screw (12) on alternator mounting bracket (11) and alternator bracket (17). 6. Tighten screw (15) to 40 lb-ft (54 N•m). 7. Tighten nut (24) to 155 lb-ft (210 N•m). 8. Install ground strap (8) on stud (9) with washers (10) and (7), lockwasher (6), and nut (5). 9. Position 3/8-in. breaker bar on belt tensioner (4) and move tensioner (4) clockwise and install drivebelt (1) on power steering pump pulley (3) and alternator pulley (2). b. Installation a. Removal INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Maintenance and repair shop equipment: automotive (Appendix B, Item 2) Materials/Parts Lockwasher (Appendix G, Item 191) Lockwasher (Appendix G, Item 133) Lockwasher (Appendix G, Item 151) Personnel Required One mechanic One assistant Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition • Hood raised and secured (TM 9-2320-280-10). • Battery ground cables disconnected (para. 4-73). • Engine access cover removed (para. 10-15). • Alternator cables removed (para. 4-5.12). General Safety Instructions Alternator must be supported during removal and installation. 4-12.38 Change 3 TM 9-2320-280-20-2