PUMP GP-TRANSMISSION 9U8019 - 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 the belts are too loose, vibration causes unnecessary wear on the belts and pulleys. Loose belts may slip enough to cause overheating.To check accurately the belt tension, a suitable gauge should be used.
Illustration 1 g06198436
Typical example
(1) Belt Tension Gauge
Refer to the Original Equipment Manufacturer (OEM) for guard removal. Install the 144-0235 Belt Tension Gauge (1) at the center of the belt between the alternator and the crankshaft pulley and check the belt tension.
The correct tension for a new belt is 400 N (90 lb) to 489 N (110 lb). The correct tension for a used belt that has been in operation for 30 minutes or more at the rated speed is 267 N (60 lb) to 356 N (80 lb)
If twin belts are installed, check and adjust the tension on both belts.Adjustment
Illustration 2 g06198446
Typical example
Loosen bolt (3) and nut (not shown) and loosen bolt (6).Note: On some applications the bolt (2) may need to be loosened to allow full movement of the alternator.
Move the alternator (5) to adjust the belt to the required tension. Use 144-0235 Belt Tension Gauge to check belt tension, when tighten bolts (2) (3) and (4) to a torque of 25 N m (221 lb in).
Ensure that the belt is at the required tension after all bolts have been tightened.
Install the guards, refer to OEM for guard installation. For a detailed description and bolt torques refer to the "Disassembly and Assembly", V-Belts - remove and Install.