A 'British' ERF for Europe
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ERF will have on show at Earls Court a truly British 38ton-gcw-tractive unit. The chassis is basically the latest A-series, but much detail effort has gone into making it suitable for Continental operation at 38 tons gcw.
The two-axle tractive unit (A84 GXB) uses, for the first time at this weight, the classic combination of Gardner engine, David Brown gearbox and Kirkstall axles. The front axle has a 6.5-tonne capacity and the rear D85-13-2 axle a capacity of 13.2 tonnes. This axle, which is of the much-favoured hub-reduction type, has a ratio of 5.04 to 1 and gives the vehicle a top speed of 58 mph. The Gardner 8LXB engine produces 240 bhp at 1850 rpm and 6951b ft at 1100 rpm and is matched to David Brown's new heavy gearbox, the 8.750. This gearbox is an eight-speed range-change design and has an overdrive top gear. The clutch is a 14in-diameter LipeRailway twin-plate.
The cab is a Motor Panels product with a sleeper extension. This cab has a two-piece screen and is fitted with two-speed self-parking electric wipers and electric screenwashers. Instrumentation is fully metric and includes all normal equipment plus tachograph and radio.
Front brakes are 54in x 7in and rear brakes 15+in x 8in with cam actuation. Radial 12.00 x 20 tyres are fitted as standard. Fuel tank capacity is 80 gallons.
Side-member dimensions are 12+in x 3+in x ;gin and wheelbase is loft 2in. ZF power steering is fitted as standard.
Lightweight 4 x 2 tractive unit Also new at the Show is the model A64 GXB lightweight 4 x 2 tractive unit. This model has been designed specially for those operators who prefer to run the Gardner 6LXB engine. Under the new 6 bhp per ton power-to-weight regulations this engine, which is rated at 180 bhp (BS AU 141a: 1971 net installed), is limited to operation in a 30-ton-gcw vehicle. The Gardner engine is used in conjunction with a David Brown six-speed gearbox type 06/600 which has an overdrive top gear, and a 15in Borg and Beck twin-plate clutch. The rear axle is the Kirkstall D65-8-1 hub-reduction type with an overall ratio of 6.11 to 1 and gives a top speed of 50 mph.
The standard ERF glassfibre cab is fitted and has extra soundproofing, a bonnet quilt and a new twin towing attachment to the extended chassis frame members.
New 30—ton 8 x 2 tipper Model 68GXB 30-ton-gvw 8 x 2 tipper is a configuration new to ERF. The rear bogie arrangement is made up of a single drive axle with trailing "third" axle. The drive axle is fitted with a differential lock and it is claimed the configuration offers reduced weight while still having the differential lock for increased traction.
The design includes a widespread 19-ton-capacity rear bogie. Other chassis features include: six-speed gearbox with overdrive top gear, 17in-diameter single-plate clutch, ZF power steering and ERF glassflbre cab.