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The Class 8 truck gross vehicle weight rating (GVWR) is a vehicle with a GVWR exceeding 33,000 lb (14,969 kg). [ 2 ] [ 28 ] These include tractor trailer tractors, single-unit dump trucks of a GVWR over 33,000 lb, as well as non-commercial chassis fire trucks; such trucks typically have 3 or more axles. [ 29 ]
From 1972 through 1980, it was offered in two ranges: the 5050 with mid-range engines and the 5070 with heavy duty engines. Available in 4×4, 6×4, and 6×6 configurations [a], they were usually straight trucks but most offered trailer brake options. Semi tractors were also available.
Class 4 – GVWR ranges from 14,001 to 16,000 pounds (6,351 to 7,257 kg) Class 5 – GVWR ranges from 16,001 to 19,500 pounds (7,258 to 8,845 kg) Class 6 – GVWR ranges from 19,501 to 26,000 pounds (8,846 to 11,793 kg) Class 7 – GVWR ranges from 26,001 to 33,000 pounds (11,794 to 14,969 kg)
Fuller manual transmissions with 5 to 15-speeds were available. Single and tandem, rear axles were available. Gross vehicle weight ratings (total weight of the truck) could be up to 60,000 pounds (27,000 kg) and up to 140,000 pounds (64,000 kg) including trailers. [53] [62]
A Y weight class (14,000 lb) was added in 2009. C and Y weight class trailer plates started at C/A and Y/A respectively, while other trailer plates started where the 1994 series left off Heavy Truck 1992–93: Embossed green serial on white plate; "TRUCK" and "WISCONSIN" centered at top and bottom respectively; "92" at bottom right A/B 1234
This means that the "outer group" or axles 1-5 which comprises the entire Gross Vehicle Weight (GVW) of truck and all interior combination of axles must also comply with the bridge formula. State may not issue less than four citations when a truck violate each of the Federal weight limits on the Interstate System which are: 1) Single axle 2 ...
It had a higher load plate and larger coupling pin than a standard semi-trailer. Early M123 had a larger fifth wheel mounted above the frame rails, but as more standard trailers were used, the M123C and all following models had lowered fifth wheels. The pin remained larger, so any trailer towed by any M123 had to have an interchangeable pin. [3]
While the M35 was designed to act as the prime mover for the M55 Quadmount system, which included a towed trailer, the M45 mount was often removed or the wheels removed from the trailer, and the system mounted on the bed of the truck. The M55 system was also mounted on the M54 truck. [6]