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Franklin Couch 456-4RB/G1 – an EU class O3 trailer with a 6,170 kg gross weight, a length of 14,250 mm and a width of 2,700 mm on a 9,080 mm wheelbase
The Franklin Couch 456-4RB/G1 belongs to EU trailer class O3, covering trailers with a gross vehicle weight between 3.5 and 10 tonnes. Depending on the build, this class requires either an overrun brake or already a compressed-air brake.
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At a gross weight of 6,170 kg and a kerb weight of 5,600 kg, the payload comes to only about 570 kg, while the dimensions - a length of 14,250 mm, a width of 2,700 mm and a 9,080 mm wheelbase - are among the largest in this weight class. Such a tight payload alongside such large dimensions is no contradiction for a body-heavy design.
This combination of great length, great width and low payload suits a trailer whose body itself accounts for most of the structure, such as a voluminous but light transport shell for bulky goods. At a width of 2,700 mm, the applicable rules for wide loads also need to be observed before the trailer is taken onto the road.
When buying used, the long, wide body deserves particular attention for distortion, since such a low payload leaves little reserve for extra loads caused by deformation anyway. The brake system should be checked for correct operation according to its type, as should the wheel bearings along the long 9,080 mm wheelbase. Tyres and lighting also belong in the inspection. The mounting bolts of the body to the chassis are worth a close look too, since vibration over such a long overhang can work them loose over time.
Sources: SpecCodex-Register: Kennwerte des Modells 456-4RB/G1
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