MANIFOLD 8J7498 - Caterpillar

V-Belts (if equipped)
Inspection
Illustration 1 g03648357
Arrangement for the V-beltsTo 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 the belts are too loose, vibration causes unnecessary wear on the belts and pulleys. Loose belts may slip enough to cause overheating.To check the belt tension accurately, use 144-0235 Belt Tension Gauge.
Illustration 2 g01003936
Typical example (1) GaugeFit the gauge (1) at the center of the longest free length and check the tension. The correct tension for a used belt is 355 N (79.8 lb). If the tension of the belt, is below 250 N (56 lb) adjust the belt to 355 N (79.8 lb).Note: The correct tension for a new belt or new belts is 535 N (120 lb). A higher tension is required in order to compensate for the stretch that is in a new belt. Only use the higher tension on a belt that has not been used. A used belt is a belt that has been in operation for 30 minutes, or a longer time period.If twin belts are installed, check and adjust the tension on both belts.Adjustment
Illustration 3 g01430645
Typical example
Loosen alternator pivot bolt (2) and bolt (3) .
Move alternator (2) in order to increase or decrease the belt tension. Tighten the alternator pivot bolt (2) and bolt (3) to 22 N m (195 lb in). (1) .Replace
Refer to Disassembly and Assembly, "V-Belts - Remove and Install" for the correct procedure.Poly V-Belt (if equipped)
Inspection
Illustration 4 g01251375
Typical exampleTo maximize the engine performance, inspect belt (1) for wear and for cracking. Replace the belt if the belt is worn or damaged.
If the belt (1), has more than four cracks per 25.4 mm (1 inch) the belt must be replaced.
Check the belt of cracks, splits, glazing, grease, and splitting.Replace
Refer to Disassembly and Assembly manual, "Alternator Belt - Remove and Install" for the correct procedure.