TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 319 of 890
TM 9-2320-280-20-1 ALTERNATOR 2-224.10 Change 1 KNOWN INFO POSSIBLE PROBLEMS VOLTAGE OUTPUT INCORRECT ALTERNATOR REGULATOR WIRING TEST OPTIONS REASON FOR QUESTION VISUAL Must know model of alternator to perform tests. DIAGNOSTIC FLOWCHART C H FROM B1, Page 2-204 NO SEE NOTE OPPOSITE PAGE KNOWN INFO POSSIBLE PROBLEMS ALTERNATOR REGULATOR VOLTAGE OUTPUT INCORRECT REGULATOR HAS ENERGIZING VOLTAGE TEST OPTIONS REASON FOR QUESTION STE/ICE-R TEST 10 (Interleave with control function 01 of page 2-734 then 89, page 2-750) Determine if high or low output voltage. H1 IS THIS A NIEHOFF 400 AMP DUAL VOLTAGE ALTERNATOR? H2 START ENGINE AND ALLOW TO IDLE AT 1200-1500 RPM FOR 2-3 MINUTES. RECHECK VOLTAGE OUTPUT. IS ALTERNATOR OUTPUT LESS THAN 26 VOLTS? NO IF OUTPUT VOLTAGE IS OVER 30.5 VOLTS, REPLACE REGULATOR (Para 4-5.11) YES YES GO TO H4, Page 2-224.12 TEST OPTIONS REASON FOR QUESTION MULTIMETER Determine if high or low output voltage. H3 IDLE ENGINE AT 1200-1500 RPM. DOES VOLTAGE ON 14 VOLT OUTPUT TERMINAL (YELLOW INSULATOR) MEASURE BETWEEN 13.4-14.6 VOLTS? NO IF OUTPUT VOLTAGE IS NOT CORRECT, REPLACE REGULATOR (Para 4-5.14) RECHECK VOLTAGE. IF VOLTAGE IS STILL NOT CORRECT, REPLACE ALTERNATOR (Para 4-5.12) YES