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A New 6-ton 30 m.p.h. Oiler Announced

28th October 1938
Page 45
Page 45, 28th October 1938 — A New 6-ton 30 m.p.h. Oiler Announced
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A Perkins-engined Chassis, Incorporating a Number of Novel Features, Built by Messrs. Foster and Seddon, of Salford

ANEW oil-eugined goods vehicle has been introduced by Messrs. Foster and Seddon, Salford, Lancs. It is a 6-tonner in the 30 m.p.h. class powered by a Perkins six-cylindered unit.

The vehicle has, in point of fact, been designed around the Perkins " P6" high-speed oil engine, and it is intended to answer a particular demand in the home market for a vehicle with a gross-weight limit of 8 tons 12 cwt. The weight of the chassis, with tyres, is under 2 tons 2 cwt., leaving 8 cwt. for body and cab, but despite this low weight, the chassis is strongly built.

The cab is streamlined and is mounted on a steel floor, already part of the chassis.

Particular attention has been paid to the mounting of the engine, which is carried on a sub-frame. This gives the effect of a four-point mounting. In addition it assists in bracing the front of the main frame. At idling speed there is practically no vibration, whilst at higher speed there is no more than would be the case with a petrol engine.

The frame incorporates pressed-steel channel side-members, with a depth of 8 ins., strongly braced with cross-members, which are gusseted where necessary to -afford strength And rigidity. Made from special alloy steel, the springs are extra long to give easy riding over the full range of their carrying capacity. Both pairs are shackled at their rear ends.

Operating on all four wheels, the foot brake is of the Lockheed hydraulic type assisted by F. and J. vacuum-servo apparatus, vacuum being created by an exhauster integral with the engine. This auxiliary is driven in tandem with the C.A.V.-Bosch fuel pump, standard equipment on t'he P6 engine. Working in 16-in, drums, the shoes are of the Lockheed slotted type fitted with bisectors for hand operation. With this design full advantage is taken of the servo action resulting from the whole area of the brake facings being brought into contact with the drums.

Ventilated pressed-steel disc wheels are shod with 8.25 by 20 low-pressure tyres.

The lighting system is of the C.A.V.Bosch commercial type with head, side and combined stop and tail lamps. head lamps are fitted with the latest duplex reflectors. Starting equipment is of the type normally used in connection with the P6 unit and comprises the C.A.V.-Bosch 2i h.p. axial-type starter motor with Lucas 12-volt dynamo having an output of 160 watts.

Dynamo, fan and water pump are driven by belt from the crankshaft, the fan Mid water pump running at onethird engine speed.

Turning now to the major compo nents, the Perkins engine has a bore of 88.9 mm. and a stroke of 127 mm., with a Treasury rating of 29.4 h.p., the maximum output being 85 b.h.p. at 2,600 r.p.m. governed speed. Power is transmitted by a Borg and Beck clutch of no less than 12 ins, diameter, which should be of ample size for the gross weight specified.

Affording four speeds, the gearbox

has provision for a power take-off on both sides. Pinions, shafts and bearings should be fully adequate for transmitting the high maximum torque of which the engine is capable. The rear axle is of the fully floating bevel-gear type with a straddle-mounted pinion having two tapered-roller bearings at the front and a parallel-roller bearing at the rear.

. The standard axle ratio is 5.7 to 1 with an optional ratio of 6.3 to 1. Particularly sturdy, the front axle comprises a drop-forged beam of I section, whilst the stub axles have roller thrust bearings and tapered-roller wheel bearings. Steering is by cam and lever, with spring-spoke wheel of the latest type. The drag link is fitted with self adjusting ball joints. • With regard to the leading dimen sions of the vehicle, the wheelbase is 13 ft. 6 ins., which provides for a 16-ft. body without any overhang beyond the end of the frame. A 17-ft. 6-in. Lutontype body can be easily accommodated.

A particularly interesting feature is the unique design of the front wings and cab floor. The latter is of heavygauge sheet steel, to which the front guards are attached. Thew are none of the usual stays bolted to the frame. Plenty of leg room is afforded for both driver and mate, and the whole assembly comprises a strong and rigid structure which is light in weight.

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People: Mid
Locations: Salford

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