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).
Distorted replenishing valve seats on Bentley V Front Shock Dampers and the required lapping process.
| Identifier | ExFiles\Box 99\3\ scan0175 | |
| Date | 14th May 1940 | |
| f.{Mr Friese} 442. ? e To JRD. from Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham} c. to Sr. Rm{William Robotham - Chief Engineer}/ClmT11/JMc.14.5.40. Bentley V Front Shock Dampers. It has been found that the replenishing valve seats on the pistons are generally distorted somewhat after assembly. It is, therefore, necessary to check these seatings on all production front dampers, and they should be lapped in. Lapping reduces the leak considerably and it will be found necessary to use a groove .100" wide and .015" deep, of rectangular section to obtain the desired leak. Rm{William Robotham - Chief Engineer}/Clm.{D. D. Clapham} | ||