a ( Pulling His Weight In the yard of. Smith Express Lines Ltd., driver Bob Bnnklow pulls his weight on the ]ob with one of few -Yard Brute tractors in Ontario. tractor is specially equipped a "fifth wheel (a witn hitch) which allows the to shunt traders driver around the yard without raising the landing gear, a time-consuming The tractor .is built by a Toronto firm strictly yard use and eannot use public highways.