24. SERVICE PROCEDURE 24.6.5 CHECK FAN BELT TENSIONER BEARING BELT AND FAN HUB Check fan belt Remove the drive belt by lifting tensioner using a 3/8 inch square drive wrench to release the tension. Inspect the blet for damage. Replace belt if any damage is found. Check the tensioner bearing With the fan belt removed rotate fan hub. The tensioner pulley should spin freely with no rough spots defected under hand pressure. Check the tensioner bearing. Replace bearing if damaged. Check fan hub. With the drive belt removed, rotate fan hub. The fan hub should spin freely without excessive end play. Check the fan hub bearing. Replace bearing if damaged.
24.6.6 CHECK FAN BELT TENSION Measure the belt deflection at the longest span of the belt. Maximum deflection: 9.5-12,7 mm (3/8-1/2 inch) If tension is low (deflection is outside range): (see 24.6.5. “Check fan belt tensioner bearing, belt and fan hub.”) Check belt & replace if damaged. PC160/180/200-6k-ENG Check tensioner & replace if damaged. 3-71