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Peter Winterthur SAT 28: an EU class O4 trailer with a gross vehicle weight of 22,000 kg, an unladen weight of 4,200 kg, a length of 12,040 mm and a 7,720 mm wheelbase, built in 1986
The Peter Winterthur SAT 28, with a gross vehicle weight of 22,000 kg, belongs to EU class O4, the heavy trailers above 10 tonnes. Vehicles in this weight class serve heavy-duty and construction-site transport, long-distance haulage, and the carriage of dense, compact goods that pack a lot of mass into a small footprint.
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The 1986 SAT 28 has an unladen weight of just 4,200 kg, giving it a payload of 17,800 kg, a high share for this weight class. At 12,040 mm long, 2,480 mm wide and with a 7,720 mm wheelbase, it is a long, light build suited to bulky rather than especially heavy goods. Such a light, long chassis suits bulky rather than dense cargo, since more of the gross weight stays available for payload.
Trailers in this weight class run with air brakes as standard, since EU rules no longer permit an overrun brake above 10 tonnes. Towing vehicle and trailer form a single braking unit matched to the combined train weight; such a combination is driven with a category CE licence.
Anyone buying a trailer of this age should check the frame for rust and past accident damage, especially around the axle mountings. Brake lines, brake cylinders and the connection to the towing vehicle need a function check, and the tyres should be judged on age rather than tread alone. Lighting, number-plate mount and underrun guard should also be complete and undamaged.
Sources: SpecCodex-Register: Kennwerte des Modells SAT 28
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