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).
The premature sludging of Phantom III pressure oil filters.
| Identifier | ExFiles\Box 131\4\ scan0276 | |
| Date | 9th June 1937 | |
| To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} c. to Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} 1113 also 1139 Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}14/AP.9.6.37 PHANTOM III. PRESSURE OIL FILTERS. Experience gained on 35-EX. in France has shewn that the pressure filter can become completely sludged up in 9,300 miles. As the instruction book lays down 10,000 miles as the period between attention, an immediate alteration is required and Depots should also be informed. Investigation of the exact mileage would be a long job, as examining the filter destroys evidence on account of the necessity of cleaning out the bowl to prevent dirt reaching the clean side of the element when it is replaced. A figure will therefore have to be estimated. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||