Compressor HVAC: Service and Repair

Fig. 16 Belt Tension Inspection:

1. Using a suitable belt tension gauge, measure drive belt deflection by pulling or pushing at mid-point of the belt between pulleys shown with a force of 22 lbs.
2. Deflection should be 0.39-0.43 inch. If deflection is not within specifications, tighten belt as follows:
a. Loosen tension pulley securing nut.
b. Adjust tension to specification with adjusting bolt, 0.32-0.35 inch for a new belt and 0.39-0.43 inch for used belt. [01]
c. Tighten securing nut.
3. Check belt tension after driving vehicle.


[01] -- A belt which has been installed and run for 15 minutes is considered "used".