TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download
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TM 9-2320-387-24-2 1 18-4. STARTER REPAIR (Cont’d) I I I 6. Connect 24 volts direct current to starter motor (10). CAUTION Do not operate starter motor for more than 30 seconds at a time. Allow starter motor to cool at least 2 minutes between tests, or damage to starter motor may result. 7. Close switch (9), adjust voltage to 20 volts on voltmeter (13) using carbon pile (121, and check rotating speed of armature with tachometer. Check current draw on ammeter (11). 8. Maximum current draw should be 65 amperes with a minimum armature speed of 5,000 rpm. If low- speed, high-current draw condition exists, check bearing alignment or inspect armature for shorts or grounds. If low-speed, low-current draw exists, inspect starter motor for faulty connections or poor brush contact. FOLLOW-ON TASK: Install starter (para. 4-11). 18-27