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Erhardt ESA 10L1 – EU class O4 trailer: 28,000 kg gross vehicle weight, 7,510 kg unladen weight, 2,550 mm wide, built 1995
With a gross vehicle weight of 28,000 kg, the Erhardt ESA 10L1 falls into EU trailer class O4, the heavy trailers and semi-trailers above 10 tonnes hauled with their own air brake system behind trucks or tractor units in heavy-goods transport. Vehicles of this weight class carry their load across several axles and need a correspondingly load-bearing chassis.
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The ESA 10L1 was built in 1995 and has an unladen weight of 7,510 kg; against a gross vehicle weight of 28,000 kg, that leaves a payload of 20,490 kg. Width is 2,550 mm.
Trailers of this size carry the actual load volume in road haulage, while the towing vehicle supplies drive and steering. From class O3 upward, the EU requires a dedicated air brake system with sound lines and working brake cylinders on every axle so that braking takes hold reliably along the whole length of the vehicle.
When buying used, an air-braked trailer of this size and age lives or dies on the brake system: check lines, brake cylinders and linings on every axle for corrosion, leaks and wear. Inspect the chassis and frame for rust, cracks and earlier repair welds, along with axle bearings, suspension, tyres and tread depth, lighting, and the coupling to the towing vehicle. With a build year of 1995, pay particular attention to the condition of the frame and axle suspension after decades in service.
Sources: SpecCodex-Register: Kennwerte des Modells Erhardt ESA 10L1
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