TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 6-44.4 Change 1 Table 6-D. No-Load Test. Table 6-E. Full-Load Test. AMPS 28VDC 14VDC DIAGNOSIS 162-200 21-25 10.5-12.5 Test bench battery is discharged (or defective). Allow to charge (or replace). 162-200 26-30 13-15 Give time to stabilize while monitoring VOLTS. If VOLTS rise above normal range (26-30 volts), regulator and/or tube assembly must be replaced. If AMPS fall, charging system is OK. 162-200 31-35 15.5-17.5 STOP TEST. Regulator and/or tube assembly must be replaced. Refer to static testing, task c. 80-118 21-25 10.5-12.5 Alternator and/or regulator must be repaired or replaced. Refer to table 6-F. 80-118 26-30 13-15 Regulator OK. Refer to table 6-E. 80-118 31-35 15.5-17.5 STOP TEST. Test bench malfunction or wiring error. AMPS 28VDC 14VDC DIAGNOSIS 162-200 21-25 10.5-12.5 Test bench battery is discharged (or defective). Allow to charge (or replace). 162-200 26-30 13-15 Charging system OK. 162-200 31-35 15.5-17.5 STOP TEST. Regulator and/or tube assembly must be replaced. Refer to static testing, task c. 80-118 21-25 10.5-12.5 Alternator and/or regulator must be replaced. Refer to table 6-G. 80-118 26-30 13-15 Increase load. 80-118 31-35 15.5-17.5 STOP TEST. Test bench malfunction or wiring error. NOTE • When tachometer reaches 3000 rpm, green lamp should go off, indicating proper charging from alternator. • Normal voltage range is 26-30 VDC. High amperage is +10 percent over the rated alternator output of 162 amps at 5000 rpm. 9. Perform full-load test. Ensure all load switches are in ON position on 500 amp test stand, and increase alternator speed to 5000 rpm. Set load to 81 amps/min; record results. Refer to table 6-E, Full-Load Test, for diagnosis. 10. For alternator speed and current output tracking values, refer to table 6-F. 11. Perform regulator bypass test. Prepare alternator as in full-load test. 6-5.1. 200 AMPERE DUAL VOLTAGE ALTERNATOR (12447109) TESTING AND REPAIR (Cont'd)