New Seddon 8-tonner has Gardner Engine

24th September 1954, Page 121

24th September 1954

Page 121

Page 121, 24th September 1954 — New Seddon 8-tonner has Gardner Engine

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Last-minute Entry to Commercial Motor Show hag 5LW Engine

,AST-MINUTE surprise at the thrunercial Motor Show appears in the shape of a new Seddon 8mr-wheeler, with a Gardner 5LW sgine and full forward control.

s the first time that Seddon Diesel lea, Ltd., have been known to

t from their usual practice of Perkins oil engines to all their• es. The reason is that the new Ic has been designed primarily fficult haulage conditions overseas, which a larger, slower-revving e is considered by the manuel.'s to be more suitable.

power unit, which develops hp. at 1,700 r.p.m., with a maxitorque output of 300 lb.-ft. at r.p.m., is mounted in the frame as t with the four-speed synchromesh ox. Gardner swinging links at the and rubber mountings at the rear the suspension system, and a ulic torque-reaction damper is ,orated. The 16-in.-diameter clutch a sprung centre-plate and is ted hydraulically.

gearbox, which gives a directtop-gear ratio, is of the type that 'roved successful in the Seddon ne central-engined coach chassis. kinds of rear axle are offered. These are an overhead-worm-drive unit and an Eaton 18,500 two-speed axle, a wide range of ratios being available in each case.

A two-piece propeller shaft, with a Layrub flexible coupling behind the gearbox and Hardy Spicer needle-roller joints at the flexibly mounted centre bearing and rear axle, is used. The combination of a flexible clutch centre and Layrubcoupling at the gearbox is known to be effective in damping out transmission vibration, especially on the overrun, with corresponding reduction in bearing wear throughout the transmission line.

Semi-elliptic springs are fitted to front and rear axles, and telescopic dampers arc standard equipment, The Marles cam-and-double-roller steering gear can

he placed for either leftor right-hand drive.

A compact Clayton Dewandre airpressure servo is fitted to the Girling hydraulic braking system. It saves weight without reducing braking performance. The front brake drums are 151in. in diameter and 41 in. wide, and the rear drums are 151 in. diameter, with a width of 6 in.

Deep pressed-steel chassis side members. with flat top flanges are braced by seven pressed-steel bolted crossmembers of equal length, giving a parallel frame from front to rear.

The wheelbase is 14 ft. 6 in. and the overall length is 24 ft, 9 in. This allows a maximum body length of 19 ft. Two Lyre sizes are offered, 9.00-20-in. (12ply) being standard for home use, with 10.00-20-in, equipment on overseas vehicles. These sizes permit gross vehicle weights of 12 tons and 14 tons respectively.

The cab, together with the front wings, is flexibly mounted on the chassis frame. The driver's seat is adjustable and all-round vision is ensured by the deep, wrap-round windscreen,