From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Alterations and issues with governor units, including oil leaks and the need for a filter.
| Identifier | ExFiles\Box 151\2\ scan0264 | |
| Date | 27th July 1934 | |
| -2- The alterations to make the governor unit satisfactory are, (1) new position oil release orifice to Rs. {Sir Henry Royce's Secretary} 1465; (2) two .092" dia. vent holes in the top cover, with a layer of petrol gauze attached to the cover to prevent dirt getting in through the vent holes into the unit, as shown in Rs. {Sir Henry Royce's Secretary} 1468. As the production 25 HP. governor units are liable to leak oil, we suggest that these modifications should be brought on as soon as convenient. The same applies to Ph.II. Having cured the leak of oil from the governor unit we find on certain cars there is a distinct leak of oil from the gearbox through the same drain hole. Although we have been able to effect an improvement in preventing this leak, we are not satisfied yet with the results, but hope to be able to give details of how to cure this leak in about a week's time. The Governor Unit Filter. N.Sch.4148. In view of the trouble which has arisen with cars in customers' hands from dirt under the valves of the governor unit, we think this filter should be brought on to production at the earliest moment avoiding scrap. If by remote chance we found the filter adversely affected the action of the pump, we would still be able to use the new casing without a filter. Even if the greatest care is taken in supplying the governor units clean, there will always be the chance of scale from the pipe lines getting to the unit after the chassis leaves the Works. So it appears that until we get a filter as N.Sch.4148 we cannot hope to forget this trouble of dirt under valves. Ha/I.A.Leslie. | ||