GENERATOR AR 7C1622 - Caterpillar

Hydraulic Pump Belts
Inspect
For maximum performance, inspect the belts for wear and cracking. Check and adjust the belt tension to minimize belt slippage which will decrease belt life and cause poor performance of alternator, water pump, and any driven equipment. To check the belt tension, apply 110 N (25 lbs) of force midway between the pulleys. Correctly adjusted belts will deflect 14 to 20 mm (9/16 to 13/16 in).If new belt(s) are installed, check belt adjustment again, after 30 minutes of operation. For multiple belt drive applications, always replace belts in matched sets.If only one belt of a matched set is replaced, it will carry more of a load than the belts not replaced since the older belts are stretched. The additional load on the new belt could cause it to break.Belt Adjustment
1. Loosen jam nut (1) and turn bolt (2) clockwise to tighten the belts or counterclockwise to loosen the belts to obtain the correct adjustment.2. Tighten the jam nut.3. Check the belt deflection. Readjust if necessary until the correct deflection is attained.