Frame Fastener Torque Check

Frame brackets and components secured with Huckbolt® fasteners do not require a torque check, however, they should be inspected for damage. Frame brackets and components secured with conventional bolts and nuts are to be checked at Initial Maintenance (IM). Check the torque of frame fasteners to offset the effects of "bedding in" (or seating). When checking torque, torque the nut, not the bolt head whenever possible. This will give a true torque reading by eliminating bolt-body friction. When checking the torque of frame fasteners, inspect the frame for cracks and other damage. Set a click-type torque wrench to the maximum torque of the fastener you are checking. Apply pressure until the torque wrench clicks. Do not loosen the bolt to check the torque. See  in the 47X and 49X Workshop Manual for torque specifications.

Check the fasteners at the following locations:

• axle stops

• deck plates

• equalizer brackets

• exhaust brackets

• fifth wheel legs

• fifth wheel mountings

• frame crossmembers and gussets

• front frame brackets

• front suspension spring brackets

• fuel tank brackets

• radius rods

• rear suspension spring brackets

• shock absorbers

• all other suspension fasteners

• all other axle fasteners

• all other frame fasteners

Any component that shows signs of cracking or other damage must be repaired or replaced. Refer to the vehicle workshop manual for repair or replacement information.