George Neville single-axle tipping trailer
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• An important variation of the George Neville frameless tipping trailer, shown at Earls Court and described in the September 27 1968 issue of Commercial Motor, has been announced by the York Trailer Co. Ltd. The trailer is a single-axle version of the original two-axle unit, the TandemDump, which is known as the Uni-Dump and is being produced by Neville Truck Equipment Ltd.
As in the case of the Tandem-Dump, the Uni-Dump is being marketed exclusively by the York company under the York /Neville banner. It is plated for 19.75 tons g.v.w., with a choice of 15 cu.yd. and 18 cu.yd. bodies, and provides for payloads of over 16'tons when coupled to a modern mediumweight tractive unit. Unladen weight of the trailer is 2 tons 18cwt with a 15 cu.yd. body and 3 tons 2cwt when the 18 cu.yd. body is fitted. The Tandem-Dump (exhibited at Earls Court) is a 31-ton-gross machine with a 20 cu.yd. body. The body of both versions is of all-steel, all-welded fabrication.
The geometric configuration of the new tipping trailer is such that its centre of gravity is well within the wheelbase when it is tipped, and this would normally be the case if there were a payload residue lodged in the scow end of the body. Return of the body under gravity to the horizontal posidon after tipping is therefore normally assured.
In common with the Tandem-Dump, the Uni-Dump is equipped with Chevron rubber-springs (designed by Mr. Neville) which give the York 10-ton axle a laden/unladen deflection of lin. and contribute to tipping stability. Axle inclination is controlled by bump stops located under the axle tube. Tipping stability is augmented by the low height of the tipping axis which is only 20in. above ground level.
Body details include box-section capping rails and floor-stiffening longitudinals that resist body twist. Load-sticking tendencies are reduced by giving the corners a radius of 10in.
When it is being tipped, the trailer is moved towards the tractive unit, or the latter is moved rearwards, depending on whether the tractive-unit or trailer brakes are applied. Both units are designed to work with Barber-Greene and other types of road finisher.
Operated by a three-line air-pressure system, the 15/2-in. by 8+in. brake shoes provide a total braking area of 512 sq.in. brake reaction being taken by rubber-bushed steel radius rods. Operation of the Edbro singleram 5SC tipping gear is stabilized by robust radial arms.
The 10-stud wheels may be equipped with Michelin X D.22.5 tubeless tyres or with 10.00-20, 16-ply covers.