FRAME Every 60,000 miles or 6 months: Frame Fastener Torque Requirements Refer to specific manufacturer's literature for any special instructions. Standard Grade 8 UNF or UNC and Metric Tighten all frame fasteners with a torque wrench. Torque specifications apply to the following fasteners with lightly lubricated threads. Remove fifth wheel from vehicle. Refer to the Shop Manual, “Fifth Wheel Removal.” Steam clean the fifth wheel and mounting brackets. Whenever possible, torque all frame fasteners on the nut end, not the bolt head. NOTE Check all moving parts for excessive wear or damage. Replace all worn or broken parts. 5 Complete two-month service procedure. Install fifth wheel.
Refer to the Shop Manual, “Fifth Wheel Installation.” 5-114 Y53-6077-1B1 (03/17) FAS- TENER SIZE TORQUE * Nm Lb-Ft 5/16 22-30 16-22 3/8 41-54 30-40 7/16 75-88 55-65 1/2 109-122 80-90 9/16 156-190 115-140 5/8 224-265 165-195 3/4 394-462 290-340 7/8 517-626 380-460 1 952-1,129 700-830 1-1/8 1,346- 1,591 990-1,170 1-1/4 1,877- 2,217 1,380- 1,630 METRIC WITH NYLON INSERT NUTS M5 8-12 6-9 M6 9-15 7-11 M8 23-31 17-23 M10 33-43 24-32