Section 03-05: Drive Belts, Accessory
1996 F-Series, Bronco Workshop Manual
ADJUSTMENTS

Drive Belt Tension Adjustment, Manually Tensioned Belts, 7.5L Gasoline Engine

 

  1. Use Rotunda Belt Tension Gauge 014-R1056 or equivalent for checking tension.

  1. Loosen generator adjustment bolts.

  1. Tighten pivot bolt enough to remove all free play from pivot area but not enough to prevent the generator (GEN) (10300) from rotating to allow belt tensioning.

  1. Place an adjustable wrench on the top lug of the generator and rotate generator until the drive belt (8620) is tightened to the proper tension.

    Be sure to use the new belt tension for new drive belts and the used belt tension for used drive belts. A used drive belt is one with more than 5 minutes of engine (6007) operation. See Drive Belt Specifications chart in the Specifications portion of this section.

  1. Tighten adjustment bolt to specification while maintaining belt tension. Refer to illustration for torque specification.

  1. Tighten pivot bolt to specification. Refer to illustration for torque specification.

  1. Check and readjust belt tension if necessary.

  1. Start engine and idle for 5 minutes.

  1. Recheck belt tension.

  1. If tension is less than the minimum tension after 5 minutes of operation as indicated on the table, then reset belt tension to within used belt tension limits. Start engine and idle for 5 minutes. Recheck belt tension.

  1. If belt will not hold tension, then replace drive belt.

    ItemPart NumberDescription
    18620Drive Belt
    2N811023-S309Screw
    3391319-S2Bolt
    4021-00019Belt Tension Gauge
    A—Belt Tension Range 800 Nm
    (180 Lbs.)
    B—Tighten to 40-55 Nm
    (30-41 Lb-Ft)
    C—Tighten to 54-71 Nm
    (40-52 Lb-Ft)