TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 316 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION ALTERNATOR Change 1 2-224.7 1. Connect RED clip to the indicated test point, BLACK clip to negative or ground. 2. Start Test 89, DC Volts. 3. Displayed reading is in volts. 0-45 DC VOLTS STE/ICE-R TEST 89 NOTE The regulator for this alternator has overvoltage protection. Any output voltage over 30.5 volts is an overvoltage. 1. Start test 10, Engine RPM. 2. Crank or start the engine. Displayed reading is RPM. Engine RPM should be 1200-1500. ENGINE RPM STE/ICE-R TEST 10 Output voltage of 26-30.5 is acceptable for this alternator. NOTE For 60 amp Prestolite alternator, go to B, page 2-204. For 100 amp Prestolite alternator, go to C, page 2-208. For 200 amp Prestolite alternator, go to D, page 2-212. For 200 amp single voltage Niehoff alternator, go to E, page 2-218. For 100 amp single voltage Niehoff alternator, go to F, page 2-222. For 100 amp dual voltage Niehoff alternator, go to F.1, page 2-224.2. For 200 amp dual voltage Niehoff alternator, continue with G. For 400 amp dual voltage Niehoff alternator, go to H, page 2-224.10. NOTE The regulator for this model alternator has overvoltage protection. Any output voltage over 30.5 volts is an overvoltage. Output voltage of 26-30.5 is acceptable for this alternator.