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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 11Y 1. Replace coolant pump (WP 0241 00). 2. Verify no faults found. BY 1. Engage thermostatic fan speed switch (see your -10). 2. Does fan still fail to rotate? YES NO BYN 1. Replace thermostatic fan speed switch (WP 0231 00). 2. Verify no faults found. B2Y 1. Stop engine (see your -10). 2. Remove ventilating fan drive belt (WP 0243 00). 3. Manually rotate ventilating fan drive shaft pulley (1). 4. Does fan spin freely? YES NO B2YN 1. Faulty fan drive gearbox. Beyond unit maintenance repair. 2. Notify supervisor. B3Y 1. Manually rotate adjustable (1) and nonadjustable (2) ventilating fan drive idler pulleys. 2. Do pulleys spin freely? YES NO B3YN 1. Replace adjustable and/or nonadjustable idler pulleys (WP 0240 00). 2. Verify no faults found. 0014 00-5 Change 2