XA-A812
Fifth Wheel Slide Base Assembly
SAF-Holland

The slide base assembly features precision engineered dimensions that support a stable, uniform interface for trailer coupling operations. With a substantial width of 39.50 inches, a moderate height of 7.70 inches, a travel length of 12 inches, and an overall length of 31 inches, this base provides a compact yet robust platform for smooth pivoting and retraction of the hitching surface. Its geometry is designed to maintain alignment under variable road loads, minimize side play, and promote consistent kingpin engagement during docking cycles. Operated within critical vehicle systems, the component falls under VMRS code 059-001-045, aligning with the common family of slip and slide base mechanisms used in heavy-duty tractor trailers. The unit integrates readily with standard slide rails and mounting patterns, enabling straightforward serviceability and replacement in the field. Practically, it supports dynamic load distribution during cornering, braking, and tight maneuvers, reducing wear on adjacent structure and prolonging service life of the fifth wheel assembly. In fleet applications, the described footprint and travel range facilitate compatibility with a variety of tractors and hitches, while maintaining tight tolerances and predictable performance across a broad operating envelope. Category context indicates its role as a foundational element in the fifth wheel sliding subsystem of heavy-haul and long-haul configurations.