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Bergwerff BT3500: the only trailer of this brand outside the named ranges, model year 2006, 3,500 kg gross weight, 710 kg unladen weight
This page carries the only trailer model of Bergwerff that the register did not assign to a named range: the BT3500 from 2006. The model designation already gives the gross weight in kilograms with its number 3500, as is common practice among many smaller trailer makers.
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The BT3500 has a gross weight of 3,500 kg against an unladen weight of 710 kg, giving a payload of 2,790 kg. At a width of 2,450 mm and an axle spacing of 750 mm, it is a compact, light chassis with a closely spaced axle layout.
With a gross weight of 3,500 kg, the BT3500 falls into EU category O2, where the brakes are usually an overrun design. This weight and payload class is typical for general-purpose trailers towed behind vans or stronger cars for house-moving loads, building material or small machines, wherever a light, easily manoeuvred chassis matters more than sheer length.
On a used example, what counts is the condition of the axle and wheel bearings, the function of the overrun brake and its linkage, rust on the frame and drawbar, the state of lighting and plug, and tyres and rims. On such a closely spaced axle layout, it is also worth checking the axle mounts on the frame, since this design loads the bearings more than a chassis with wider-set axles, and uneven tread wear can point to misaligned geometry, together with the condition of the jockey wheel and its clamp.
Sources: SpecCodex-Register: Kennwerte des Modells BT3500
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