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).
Investigation into oil leaks from the water pump drive on the 20 HP engine.
| Identifier | ExFiles\Box 149a\1\ scan0016 | |
| Date | 2nd July 1928 | |
| X5150 BY/SSL/E.2.7.28. Hm.{Capt. W. Hallam - Head Repairs} C. Hs.{Lord Ernest Hives - Chair} C. MY. C. Sft.{Mr Swift} 20 HP. OIL LEAKS FROM THE WATER PUMP DRIVE. With reference to Hm{Capt. W. Hallam - Head Repairs}/HAW12/KW.9.5.28., we have been waiting for the result of investigations by the Test Department. The trouble would appear to apply to engines which were built before the oil drain holes were lowered .125. At the same time greater care was taken to obtain accurate concentric setting to the oil retaining thread of the driving shaft. The oil drain holes were lowered .125 under Alteration No. 10527/E.{Mr Elliott - Chief Engineer} on the 21.10.25. BY/SS.{S. Smith} | ||