Belt Tension

On most applications, drive belt adjustment for the Air Pump is accomplished by adjusting other component position (alternator and example-idler). For those applications that utilize an automatic tensioner, no adjustment is necessary. For those applications requiring Air Pump movement to adjust belt tension, proceed with the following:

A. Check all air pump pulleys and mounting bolts, and tighten to specification, if required.
B. Install the belt tension gauge (Tool T63L-8620-A or equivalent) on the drive belt, and check the tension. Compare the belt tension to the specified belt tension and adjust as necessary. Refer to SPECIFICATIONS.
C. If adjustment is necessary, loosen the air pump mounting and adjusting arm bolts, move the air pump toward or away from the engine until the correct tension is obtained. Use air pump belt tensioning tool to hold belt tension while tightening the mounting bolts. Install the tension gauge and check the belt tension.

CAUTION: Do not use a pry bar.