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Schlegl SA3400135: EU class O4 semi-trailer with a gross weight of 39,000 kg, a length of 13,720 mm and a 9,010 mm axle spread, built in 2000.

Schlegl SA3400135
Pictured: Schlegl SA3400135

At a gross weight of 39,000 kg, the SA3400135 reaches the upper loading limit typical of three-axle semi-trailers in Europe and belongs to EU trailer class O4. Rather than its own drawbar, a semi-trailer carries its front load through the kingpin resting on the towing tractor's fifth wheel.

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With an unladen weight of 7,200 kg, the model built in 2000 reaches a payload of around 31,800 kg. Length and width, at 13,720 mm and 2,550 mm, sit close to the European maximum dimensions, and the 9,010 mm spread between kingpin and rear axle group matches the usual layout of a standard long-haul semi-trailer.

Vehicles of this class require an air brake system controlled through the towing tractor's brake line, and drivers need a category CE licence. The slim, long build is suited to palletised or packaged cargo rather than heavy or special loads with high axle weight per metre.

Buying a used semi-trailer of this age, the condition of the kingpin and its wear plate come first, since this is the direct contact point with the fifth wheel. In addition, the air lines should be checked for leaks, the axle suspension for play, and the chassis for corrosion, especially around the axle mounts after two decades of service. The landing gear legs and the tyre wear pattern across all wheels are worth a close look as well.

Sources: SpecCodex-Register: Kennwerte des Modells Schlegl SA3400135

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