24. SERVICE PROCEDURE ADJUSTING With the automatic belt tensioner, no adjustment is required. REPLACEMENT To replace the drive belt, place a 3/8 in. drive rachet @ in the 3/8 in. square drive hole in the belt tensioner. Push the rachet “UP” to loosen the tensioner. Remove the old belt @. Inspect belt tensioner. The tensioner pulley should spin freely with no rough spots detected under hand pressure. Install the new belt. 24.4.7 CHECK ALTERNATOR AND WATER PUMP BELT TENSION, ADJUST CHECKING TENSION The engine is equipped with an automatic belt tensioner that main- tains correct tension on the drive belt. To check belt tension a Gates type gauge must be used because of the wide drive belt.
Proper tension should be 355 to 455 Nem (80 to 110 Ibs.) gauge value. lf a Gates type gauge is not available, tension may be checked by belt deflection. Press the belt with your finger at the longest span and measure the deflection. Maximum deflection 9.5 to 12.7 mm (0.37 to 0.50 in). ADJUSTMENT With the automatic belt tensioner, no adjustment is required. REPLACEMENT To replace the drive belt, place a 3/8 in. drive rachet in the 3/8 in. square drive hole in the belt tensioner. Push the rachet “UP” to loosen the tensioner. Remove the old belt. Inspect belt tensioner. The tensioner pulley should spin freely with no rough spots detected under hand pressure. Install the new belt. NOTE:
The belt tensioner is spring loaded and must be pivoted away PC160/180/200-6k-ENG from the belt. Pivoting in the wrong direction can result in damage to the belt tensioner. 3-59