XA11479
Stop Block
SAF-Holland

Defined as a stop-dedicated element, this piece governs travel limits and ensures correct positioning of moving members within the coupling stack. It interfaces between structural members to arrest motion at a predetermined location, protecting hydraulic, pneumatic, and mechanical subsystems from over-travel during engagement and disengagement cycles. Machined to tight tolerances, it ensures repeatable endpoints that preserve precise latch geometry and predictable force transfer, reducing wear on adjacent components. During service, technicians replace or reposition this block to restore original travel limits after wear, impact, or heavy usage, safeguarding alignment between the kingpin interface and the hitch platform. Classified under VMRS 059-001-082 and positioned in the 42813 category, it is a safety-critical element within trailer hitching subsystems, reinforcing reliability and preventing mis-timing that could compromise coupling safety. In practice, consistent end-stops support longer component life across the linkage stack and contribute to safer, more predictable operation during daily trucking and coupling procedures.