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).
Statistical summary of hydraulic system complaints for various car models over a six-month period.
| Identifier | ExFiles\Box 130\1\ scan0060 | |
| Date | 30th June 1933 guessed | |
| - 8 - TOTAL HYDRAULIC COMPLAINTS. 20 HP. 25 HP. Ph.I. Ph.II. TOTAL. GRAND TOTAL. REMARKS. June Quarter. C.C. 4 30 1 37 72) V.F. 1 6 - 20 27) 99 Previous Quarter. C.C. 11 30 1 36 78) V.F. 1 7 1 21 30) 108 Six Months. 17 73 3 114 207 207 HYDRAULIC KNOCKS. June Quarter. C.C. 4 18 1 22 45) V.F. 1 4 - 3 8) 53 Knocks on existing dampers are being satisfactorily dealt with by modifying the replenishing ball valves and fitting oil feed to intermediate levers as per Depot Sheet Ed.{J. L. Edwards}225. The split piston type now being produced appears satisfactory in service. Previous Quarter. C.C. 10 28 1 21 60) V.F. 1 5 - 7 13) 73 Six Months. 16 55 2 53 126 126 HYDRAULIC LEAKS. June Quarter. C.C. - 12 - 4 16) V.F. - 2 - 1 3) 19 Previous Quarter. C.C. - 2 - 5 7) V.F. - 2 - - 2) 9 Six Months. - 18 - 10 28 28 HYDRAULIC ARMS LOOSE. June Quarter. C.C. - - - 11 11) V.F. - - - 16 16) 27 This is mostly due to lever boss fouling gland nut and splines are now modified to prevent this occurring. Previous Quarter. C.C. - - - 7 7) V.F. - - - 14 14) 21 Six Months. - - - 48 48 48 | ||