TM-9-2350-277-20-1 Unit Maintenance Manual Volume 1 M113A3 M577A3 M1064A3 M1068A3 M58 Download
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TM 9-2350-277-20-1 ENGINE OVERHEATS (OLD VSFD CONFIGURATION)—Continued 0014 00 7Y 1. Engage thermostatic fan speed switch (see your -10). 2. Observe ventilating fan speed. 3. Does speed stay the same? YES NO 7YN 1. Replace thermostatic fan switch (WP 0231 00). 2. Verify no faults found. 8Y 1. Observe rotation of ventilating fan (1) and generator drive pulleys (2) on drive unit. 2. Is fan pulley rotating as fast as the generator pulley? YES NO 8YN 1. Disengage thermostatic fan speed switch. 2. Replace variable speed fan drive (WP 0249 00). 3. Verify no faults found. 0014 00-3 Change 2