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).
Depot sheet detailing modifications to address high oil consumption after fitting a larger oil pump on a Bentley.
| Identifier | ExFiles\Box 149\2\ scan0170 | |
| Date | 19th October 1937 | |
| Piles 1265 19.10.37. DEPOT SHEET. (contd). (69). BENTLEY - FITTING LARGER OIL PUMP IN ACCORDANCE WITH Rm.{William Robotham - Chief Engineer}1/R.7.7.37. The fitting of the above has been the cause of too great an oil consumption. To overcome this fault it is necessary to :- (1). Close up the oil hole in the connecting rod, which was added to provide cylinder wall lubrication under starting and cold running conditions. This is not necessary with the larger pump and the type of piston originally fitted. (2). Fit stiffer scraper ring to drawing EB.3122. (3). The new piston with reduced running clearances on the skirt to EB.3151must not be fitted, it must only be used in engines where it was fitted on production. 101 J K | ||