Jost fifth wheels for T680

Kenworth T680 on-highway trucks now come standard with the Jost JSK37USB fifth wheel.

The fifth wheel actually has just four moving parts, with a simple mechanism that allows infinite adjustments, rather than the restricted motion associated with notched adjustments. Wear adjustments are easily made with a single screw, the company adds.

Maintenance and minor rebuilds can also be performed without removing the fifth wheel from the chassis.

There’s a 60-lb.-pull-force handle, and a five-year warranty on the cast ductile iron top plates.

John G. Smith is the editorial director of Newcom Media's trucking and supply chain publications -- including Today's Trucking,, TruckTech, Transport Routier, Inside Logistics, Solid Waste & Recycling, and Road Today. The award-winning journalist has covered the trucking industry since 1995.

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