Frame Fastener Torque Check

Frame brackets and components are to be checked at initial maintenance (IM). Check the torque of frame fasteners to offset the effects of "bedding in" (or seating). When possible, always check the torque of the nut, not the bolt head. 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 fastener to check the torque. See  in the vehicle workshop manual for torque specifications.

Inspect and check the fasteners at the following locations:

• air tank mounting brackets

• axle stops

• cab mount brackets

• deck plates

• battery and tool box brackets

• engine supports

• equalizer brackets

• exhaust brackets

• fifth wheel legs

• fifth wheel mounting

• frame crossmembers and gussets

• front frame brackets

• front suspension spring brackets

• fuel tank brackets

• radius rods

• rear engine supports

• rear suspension spring brackets

• shock absorbers

• all other suspension fastenersc

• 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.