The Triple Cycles manufactured high capacity oil pump is suitable for fitting to all variations of the BSA/Triumph 3 cylinder engine. The pump s of all new construction and no parts, apart from the drive gear and retaining screw and the screws that hold the pump cover to the base plate, are interchangeable with the standard items.

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The internal arrangements of the pumps are similar to the original, but with both the feed and scavenge pumping gears lengthened by 50%. Therefore the possible pumping capacity is increased by 50%. It should be noted that the pump will not in itself provide increased oil pressure, as this is controlled by the oil pressure relief valve, however at low engine revolutions with a very hot engine an increase in pressure may well be noticed.

The body and cover of the pump are manufactured from a high grade (Grade17) Cast Iron, and machined totally from a bar form of this material. The gears, idler spindle and back plate are manufactured from EN24T Steel.

The pump requires an early type of drive gear to be fitted, a suitable original part number being 70-7249. A Triple Cycles manufactured lightened version of this component can be supplied with the pump, together with matching idler and crankshaft drive gears.

In 2002 the pump was further developed and the detail construction was changed. The body became three parts. The pumping chambers are now steel with a cast iron dividing plate. This allows the machining of the components to be more simple and results in a better product. At this time it was decided to produce a variation of the pump. It had been discovered that a few race engines, when used at very high revolutions for a long period of time, would over-oil. On one other race bike it was discovered that a slightly restricted oil cooler was not passing the full quantity of return oil. To 'work-around' these problems a 'race' pump was developed. This version uses the full +50% scavenge capacity but a reduced to +30% feed capacity.

An image of a 'new' pump will be added as soon as possible

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Triple Cycles
95 Wanstead Park Road
Telephone: +44 20 8215 4583 (answerphone only, unless by arrangement)
Facsimile: +44 20 3137 2295

Copyright © 2000 Philip Pick
Version 0.15 Date June 2006