Axle lift for all makes
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• A new design of axle lift, which can 'be fitted to the rear bogie of practically any multi-wheeled commercial vehicle has been introduced by the Primrose Third Axle Co. Ltd., Blackburn, Lancs. Like other equipment of the same type, the mechanism lifts the trailing axle of a tandem axle bogie so that more weight is carried by the driving axle to give extra grip to the driving wheels if slip is experienced.
The latest Primrose axle lift consists basically of a plate on the top of an air bellows—similar to units used for vehicle air suspensions—resting on the chassis above the trailing axle; a chain from each
side of the lifting plate is anchored to lugs welded to the top of the axle. Normal suspension movement is not interfered with when the equipment is fitted but if the air-bellows is expanded through an air valve in the cab, the plate is pushed up and it pulls up the axle by the chains.
Two guide-pillars locate the lifting plate as it slides up or down and the whole assembly is fixed to two transverse members spanning the chassis frame above the trailing axle of the bogie.
The axle lift is available in kit form at a list price of £91, for fitting to existing singledrive sixor eight-wheelers. If the equipment is fitted to a chassis at the Primrose works, the total price becomes £136, unless it is ordered as part of a Primrose third-axle conversion, in which case the cost is £110.