TM-9-2350-277-20-3 Unit Maintenance Manual Volume 3 M113A3 M577A3 M1064A3 M1068A3 M58 Download
Page 28 of 962
TM 9-2350-277-20-3 ADJUST GENERATOR DRIVE BELT — Continued 0252 00 ADJUSTMENT NOTE To allow for initial belt stretching, make sure belt tension is rechecked after 30 minutes of operation. 1. Check generator drive belt (1) for damage. If damaged, replace drive belt (WP 0253 00). 2. Position lower O-ring (2) on tensiometer (3) at maximum allowable belt deflection of 1/4 inch (0.6 cm) to 3/8 inch (1.0 cm). 3. Position upper O-ring (4) on tensiometer (3) to zero. 4. Place yardstick (5) on pulleys (6) and (7). 5. Place tensiometer (3) on belt (1) at midspan and at right angle to belt. 6. Press on top of tensiometer (3) until lower O-ring (2) aligns with bottom of yardstick (5). Remove tensiometer. 7. Take tensiometer reading at point where upper O-ring (4) stopped. Initial reading must be 15-17 lbs (7-8 kg). After 30 minutes of operation, reading must be 12-14 lbs (5-6 kg). 0252 00-2