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Wilhelm Kramer SA6 - trailer of EU class O3: 7,200 kg gross weight, 2,140 kg unladen weight, built 1974, width 2,450 mm, air brake system.
With a gross weight of 7,200 kg, the SA6 from Wilhelm Kramer belongs to the EU trailer class O3 (3,500 kg to 10,000 kg gross weight), the medium trailers towed behind trucks and tractor units. Year of manufacture 1974. Trailers in this class need a compressed-air brake system.
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With an unladen weight of 2,140 kg, that leaves a payload of 5,060 kg. The width is 2,450 mm.
Fifth-wheel or drawbar load and the design of the coupling decide which tractor unit suits a trailer like this. That places the trailer, in commercial use, between light car trailers and heavy semi-trailers.
On a viewing, the brake cylinders, lines and the air system's tightness are among the first points to check. The suspension and any dampers should be checked for leaks and correct ride height. On the frame and at the drawbar mounting points it is worth checking for rust and old weld repairs. Wheel bearings and steering knuckles should be checked for play and uneven running noise. The coupling head or kingpin shows heavy wear where the trailer has seen intensive use. Lighting, wiring harness and plug connectors are common weak points on older trailers. Tyres and rims should be checked for age and even wear, especially if the trailer has stood unused for a while. On bodies with tarpaulins or side boards, the condition often only shows up on close inspection for leaks and deformation.
Sources: SpecCodex-Register: Kennwerte des Modells Wilhelm Kramer SA6
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Turn the model, look inside and click an assembly — each one is explained.
