Coupling Trailer To Truck
Figure 3-2 – Kingpin Plate Adjustment
^ WARNING
Uncoupling hazard. Kingpin plate can separate from trailer if all bolts are not used, not properly tightened and/or damaged, which can result in death or serious injury. When adjusting kingpin plate, all hardware must be replaced and bolts must be installed through trailer mounting rail and kingpin plate mounting holes. Tighten to 155 lb-ft of torque. 5. All bolt holes in kingpin plate MUST have a bolt and locknut. Install all kingpin plate bolts and locknuts. 6. Tighten to 155 lb-ft of torque. 3.4 BEFORE ATTEMPTING TO COUPLE TRUCK TO TRAILER 1. Check the condition of the kingpin and mounting plate. Wipe the kingpin clean and inspect it for flat spots, cracks and pits.
^ WARNING
Uncoupling hazard. A worn, bent or damaged kingpin can fail while towing, which can result in death or serious injury. Inspect the kingpin and kingpin plate for wear and damage. Replace a worn or damaged kingpin or kingpin plate before towing trailer.
2. Verify that the kingpin plate and fifth wheel fasteners are tight and welds are sound.
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