SLEEVE AS-EXHAUST 2629103 - Caterpillar

Inspection
To maximize the engine performance, inspect the belts for wear and for cracking. Replace belts that are worn or damaged.For applications that require multiple drive belts, replace the belts in matched sets. Replacing only one belt of a matched set will cause the new belt to carry more load because the older belt is stretched. The additional load on the new belt could cause the new belt to break.If belts are too loose, vibration caused unnecessary wear on the belts and pulleys. Loose belts may slip enough to cause overheating.If belts are too tight, unnecessary stresses are placed on the pulley bearings and the belts which can shorten the life of those components.To check the belt tension, apply 110 N (25 lb ft) of force midway between the pulleys. A correctly adjusted belt will deflect 13 to 19 mm (.5 to .75 inch).Adjustment
Alternator Belts
(1) Mounting bolt. (2) Adjusting nuts.1. To adjust the alternator belts, loosen mounting bolt (1) and adjusting nuts (2).2. Adjust the alternator in or out by either tightening or loosening adjusting nuts (2), as necessary, in order to obtain the correct adjustment.3. Tighten mounting bolt (1) and adjusting nuts (2).If new belts are installed, check the belt tension again after 30 minutes of engine operation.Fan Drive Belts
1. To adjust the fan drive belts, loosen the mounting bolts and use the adjusting bolt.2. Move the fan drive up or down, as necessary, in order to obtain the correct adjustment.3. Tighten the mounting bolts.If new belts are installed, check the belt tension again after 30 minutes of engine operation.Replacement
Refer to the Service Manual for more information on the procedures for the following topics: belt removal and belt installation procedure.