XA-S1A80L-P
Fifth Wheel Top Plate
SAF-Holland

This high-strength load-distributing interface forms the primary connection between tractor and trailer within heavy-duty fifth-wheel couplings, transmitting horizontal torque and vertical loads through countless cycles of hitching and towing. Engineered for durability, its robust body resists deformation under full payloads while maintaining precise alignment at the kingpin interface. The VMRS code attached to this component anchors it to the standardized maintenance and service framework for fifth-wheel assemblies, aiding fleet technicians in planning replacement and inspection intervals. Design considerations include compatible mounting footprints and standardized clearances to accommodate a wide range of tractor-trailer combinations, reducing retrofit complexity and aftermarket uncertainty. In service, the assembly contributes to smoother coupling, improved hitch stability during acceleration and braking, and controlled load transfer that protects mating components such as base rails and slider assemblies. Regular inspection for wear, corrosion, and surface degradation, along with appropriate lubrication of bearing and contact surfaces, extends service life and minimizes the risk of hitch-related failures in demanding applications such as regional and long-haul operations. Within the overall category of heavy-duty fifth-wheel components, this element provides consistent performance, dependable safety margins, and a straightforward path to proactive maintenance planning.