FORWARD CONTROL FOR A GUY TIPPER.
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A Two-tonner for Narrow Places and Confined Spaces.
FROM the very nature of its work the vehicle engaged in refuse transport Must sometimes be expected to work in awkward situations and to travel over loose and unconsolidated ground. It must, therefore, be able to extricate itself from such ground, which calls for ample power and a low gear ratio. and it must be capable of being easily manceuvred anywhere. Ample bulk capacity and a low-loading level are two further requisites which were stipulated by the transport department of the county borough of Halifax when placing an Order recently for two 2-ton Guy tipping vehicles.
The order was executed with a Newt. Guy chassis, with a shortened wheelbase and with wheels smaller than those employed on the standard model. Normally, the tyres fitted on this chassis are 880 mm. by 120 mm. pneumatics, or, if solid tyres are fitted to the rear wheels, 80 ram. by 720 mm twins are used. In the Hall B28 fax vehicle the wheels are fitted with 27-in. by 342-in. solid tyres, so that, as the top of the frame is 1 ft. 111 ins, above ground level, the wheels rise very little above frame level. As the wheels are so small in diameter they are equipped with triple-tread tyres on the rear wheels and with twin-tread tyres on the front wheels. Wide tyres on the steering wheels are not desirable as a rule, but where the vehicle speed is low they offer no disadvantages: The wheelbase has been kept to 9 ft. 1 in., and this will be an important factor in operation, because the vehicle will often he called upon to manceuvre in narrow and confined places. The springs are kept somewhat fiat, the rear springs being underslung, which, again, helps to give a low platform level.
With a reduced gear ratio arising from the use of wheels of small diameter, and having in view the slow running of the machine, a 2-ton load is regarded as permissible, the increase in tyre width due to the change in tyre specification dealing with this overload in a satisfactory manner.
In order, again, to secure the body capacity without sacrificing the advantages of the low-loading level attained by the springing and wheel equipment, the driver's cab is placed beside the engine—the first time, so far as our recollection takes us, that a Guy goods chassis has been so arranged. The steering box, as our illustration shows, is mounted at the extreme forward end of the frame member.
The sides of the body are hinged halfway, so facilitating loading The tipping gear employed is the three-way hydraulic mechanism made by Bromilow and Edwards, Ltd. Mr. A. E. Boyer, who is transport manager to the county borough of Halifax, informs us that the vehicles are now in commission and that they have more than exceeded his expectations. He regards Halifax as a difficult town to serve, but the low-loading line and the speed of the vehicles are specially suited to meet stringent requirements. The transport department has designed and constructed a two-wheel trailer to work in conjunction with the Guy tippers.