Annotation of standard text SAE J2228 :
This SAE Recommended Practice applies to upper coupler kingpins for commercial trailers and semitrailers conforming to the dimensional requirements of SAE J700 when new and originally installed. The dimensions of SAE J700 are the frame of reference for this document.
SUBJECT TAXONOMY: Maintenance, repair, and service operations, Wear, Vehicles, Trucks, Buses, Trailers
SUBFILE: Commercial Vehicle
TYPE OF DOCUMENT: Ground Vehicle Standard
Stabilized: Sep 2011 