Threaded-Adjustment Type

cen mm 01.02.000

  1. Apply the parking brakes, and chock the tires to prevent the vehicle from moving.
  2. Install a belt tension gauge at the center of the belt's longest free-span. Check belt tension. See Table. for belt tension specifications.

    Table 1, Drive Belt Tension

    Drive Belt Tension

    Engine

    Component

    Belt Tension: lbf (kg)

    Caterpillar C10 (3176)

    Refrigerant Compressor

    80 to 100 (36 to 45)

    Caterpillar 3406E

    Alternator and Refrigerant Compressor

    40 to 50 (18 to 23), per belt

    Fan

    80 to 100 (36 to 45)

    Cummins M11

    Alternator

    90 to 120 (41 to 55)

    Fan

    155 to 165 (70 to 75)

    Refrigerant Compressor

    80 to 100 (36 to 45)

    Cummins N14

    Alternator

    40 to 50 (18 to 23), per belt

    Fan

    80 to 120 (36 to 55)

    Refrigerant Compressor

    80 to 100 (36 to 45)

    Detroit Diesel Series 60

    Alternator and Refrigerant Compressor

    80 to 100 (36 to 45), Power Band

    Fan

    60 to 80 (27 to 36)

      Table 1, Drive Belt Tension

    1. If belt tension is not correct, see of the Century Class Trucks Workshop Manual.
    Note:
    Document Number: 0000121795
    Manual Publication Date: 2025-02-11
    Topic Publication Date: 2024-06-04