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Metsävaunu HJ H 4000 US: extra-wide O4-class EU trailer with a 33,000 kg gross weight, 18,400 mm length and 3,260 mm width
The Metsävaunu HJ H 4000 US falls into EU trailer category O4 with a gross weight of 33,000 kg, the heavy trailers and semi-trailers above 10 tonnes used in heavy-haul and raw-material logistics.
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At 18,400 mm long and 3,260 mm wide, the vehicle is among the longer and wider designs in its class; both figures are well beyond what an ordinary road trailer needs.
A width well over 2.55 m makes a vehicle like this an abnormal load, requiring a special permit in most European countries and often an escort vehicle or police accompaniment. Towing a trailer of this weight requires licence category CE. Under EU rules, O3 and O4 trailers must carry retroreflective contour markings at the rear and along the sides. The route for such a heavy or oversized transport normally has to be registered with the responsible authority in advance, and bridges or tight bends along the way are often checked separately.
Buying such a long and wide vehicle used calls for checking the frame for twist along its full length, the axle mounts for play, and the abnormal-load markings for completeness. Lighting and warning panels for the oversized load should also be checked. After a test drive it is also worth checking that the wheel nuts are properly torqued and inspecting the tyre tread depth. Corner protectors, load-securing straps and any custom fittings for the oversized cargo should also be inspected for completeness and condition.
Sources: SpecCodex-Register: Kennwerte des Modells Metsävaunu HJ H 4000 US
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