TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 6-44.16 Change 1 6-5.2. 400 AMPERE DUAL VOLTAGE ALTERNATOR (12469057) TESTING AND REPAIR (Cont'd) Table 6-I. Full-Load Test. AMPS 28VDC 14VDC DIAGNOSIS 322-400 21-25 10.5-12.5 Test bench battery is discharged (or defective). Allow to charge (or replace). 322-400 26-30 13-15 Charging system OK. 322-400 31-35 15.5-17.5 STOP TEST. Regulator and/or tube assembly must be replaced. Refer to static testing, task c. 160-238 21-25 10.5-12.5 Alternator and/or regulator must be replaced. Refer to table 6-K. 160-238 26-30 13-15 Increase load. 160-238 31-35 15.5-17.5 STOP TEST. Test bench malfunction or wiring error. ALTERNATOR 28VDC 14VDC SPEED OUTPUT CURRENT OUTPUT CURRENT (RPM) ±5 AMP MINIMUM AMP *3 45 10 38 1200 20 28 30 18 **44 4 *5 20 10 30 1500 50 50 100 50 140 50 160 30 *187 3 *5 16 2000 60 30 97 50 120 50 ALTERNATOR 28VDC 14VDC SPEED OUTPUT CURRENT OUTPUT CURRENT (RPM) ±5 AMP MINIMUM AMP 255 50 2000 275 30 **302 3 *5 10 70 20 3500 200 50 350 50 380 20 **397 3 *5 10 5000 70 20 TO 200 25 8000 350 40 380 20 **397 3 Table 6-J. Alternator Speed and Current Tracking. * Dependent on ammeter location in test circuit. **Minimum acceptable current with no load on 28 VDC system. 24. Perform full-load test. Ensure all load switches are in ON position on test stand, and increase alternator speed to 5000 rpm. Set load to 364 amps/min; record results. Refer to table 6-I, Full-Load Test, for diagnosis. 25. Alternator speed and current output tracking values. Refer to table 6-J.