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).
New procedure for running in gearboxes with a specific oil mixture to prevent first gear failure.
| Identifier | ExFiles\Box 145\1\ scan0099 | |
| Date | 4th April 1934 | |
| X 1588 RHC.{R. H. Coverley - Production Engineer} c. to Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}7/KW.4.4.34. GEARBOX OILS. In future we wish all new Gearboxes to be run in on a 50:50 mixture of Whitmore's and engine oil. This should be changed to engine oil after each gear has been given considerable use. This includes particularly 1st and reverse gears. Although this procedure is always carried out for dynamometer tests, new gearboxes that go straight on the road do not receive this treatment, with almost inevitable failure of the 1st gear teeth in the case of 40/50 boxes. Hs{Lord Ernest Hives - Chair}/H.Grylls. | ||