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TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download

Page 697 of 1555

TM 9-2320-387-24-2 Change 1 18-10.5 18-3.1. 400-AMPERE DUAL VOLTAGE ALTERNATOR TESTING AND REPAIR (Cont'd) Table 18-5. No-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 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. 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 repaired or replaced. Refer to table 18-8. 160-238 26-30 13-15 Regulator OK. Refer to table 18-6. 160-238 31-35 15.5-17.5 STOP TEST. Bench malfunction or wiring error.