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A VISIT TO THE MANN WORKS.

6th January 1920, Page 19
6th January 1920
Page 19
Page 19, 6th January 1920 — A VISIT TO THE MANN WORKS.
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Where the Well-known Stearn Tipping Carts, Road Rollers, and Agricultural Tractors are Made.

DURINC+ A RECENT. trip to Leeds we paid a visit to the works of Mann's Patent Steam Cart and Wagon Co., Ltd. We were received il.))," Mr. Mann, Sen., who personally conducted us round the works. We found that the work was being badly delayed as a resUlt of the moulders' strike, as in steam-wagon construction a considerable number of castings is employed. At the time of our visit the stock of cylinder castings was almost exhausted, but work was, being carried on by completing other parts so that when castings once more become available as little delay as possible will occur-in production. Unfortunately, in the construction of a steam wagon; once the boiler is made; unless cylinders are procurable, the rest of the erecting is held up, as the poSitions of the crankshaft, etc., are marked off from the cylinders, and it. would require considerable alteration to change this procedure.

Steam wagons of Mann make have always been noted for their reliability, and we were interested to note some of the details. in .their manufacture : for instance, the wheel rims are made of " T " iron bent round rollers and welded. The steering sectors are cut fain a single piece of wrought iron bept into circular shape and welded. The teeth are cut on this circular piece and it is then divided into three sec

tors, one being used on each vehicle. • All the boilers are made ofT''T in. plate and the riveting is performed 'by large hydraulic riveters slung by blocks and tackle, so that they can easily ' be adjusted to any position. When erecting, the boilers are covered with asbestos strips with slag wool between them, the whole then being held in position by strips of wood. All boilers are tested hydraulically to a pressure of 400 lb. per sq. in., and

this is followed by a 350 lb. steam-pressure test. The slow-speed, final drive gear wheels are Cast froth machine-cut patterns, but the teeth .on the smaller wheels are machine-cut, the _Gutting being done on a • Sunderland gear generating machine.

We noticed that the road wheel plates are clamped together in sets of four and machined in a vertical mill.The rear wheels fit on to heiagons on the akle and can readily, be taken off for te-tyring, Or any other purpose, without removing any keys or taking out the axle. The axle hexagons are cut by a double shaping machine. Steel plates, such as wheel centres and boiler plates, are shaped in -a 301ton hydraulic press, and there are several massive steam hammers us.e:.1.for the 'munerous T argings.

The Mann works were laid down 19 years ago, and the power used in them is developed by a steam engine which was -purchased at the Paris Exhibition some 20 years ago ; this drives a dynamo which supplies the current for both power and lighting.

An example of economy was noted in the centrifugal throwers for extracting oil from the chippings and shavings collected from the machines.

The company was originallyformed to build their well-known steam carts, which are designed to replace the ordinary horsed-cart ; these vehicles are, wonderfully strong and are designed ekasily to climb hills of between 1 in 5 and 1, in 6, with a full load. -They are particularly useful for the cartage of bricks and similar materials. These carts are provided with the Mann tipping gear, which is of the direetlift, rack and pinion type, hand-operated threiugh the medium of worm gearing. There is also a large demand for the company's well-known types of road rollers.

Tags

People: Mann
Locations: Sunderland, Leeds

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