Trailer upper coupler or bolster plate and kingpin inspection and maintenance is just as important as the inspection and maintenance of the fifth wheel. The following ...
Minimizer has launched the Trailer Slick Plate, a self-lubricating polymer plate that attaches to a trailer’s upper coupler. The device makes maintenance easier, not requiring grease and is designed ...
GREENSBURG, Ind. — A rollover involving one of his tanker trucks has prompted an Indiana-based entrepreneur to design an upper coupler that promises to improve safety and extend trailer life. Elvin ...
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