TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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CAUTION TM 9-2320-280-20-1 REFERENCE INFORMATION ALTERNATOR FULL FIELD TEST 1. Disconnect battery ground cable. NOTE Tag leads before removal. 2. Remove five screws, lockwashers, and leads from bottom of regulator. 3. Insulate leads from V,P, and Z terminals. 4. Connect 6 volt lantern battery NSN 6135-00-643-1310, (or equivalent that can supply 1.0 amp current at 6 volts) with (+) battery and lead connector to W lead and (-) battery and lead connector to Y lead. Insulate all connections. 5. Monitor voltage across alternator output studs. Meter must be capable of reading 50 volts. Ensure all vehicle and on board equipment are turned off. Higher voltages could damage components. 6. Connect battery ground cable. 7. Start vehicle and run engine to 900 rpm. Run only long enough to obtain a stable output voltage reading. 8. Stop engine, remove 6 volt battery and leads. NOTE If installing alternator, reconnect regulator (para 4-114). 0-45 DC VOLTS STE/lCE-R TEST 89 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. 2-217