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).
Hydraulic system faults and their frequency across different car models over a six-month period.
| Identifier | ExFiles\Box 47\3\ Scan484 | |
| Date | 1st June 1932 guessed | |
| -11- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. HYDRAULIC KNOCKS. June Quarter. C.C. 9 24 5 34 72 ) 95 W.P. 3 8 - 12 23 ) Previous " C.C. 11 18 6 29 64 ) 89 Depot Sheets Hd.{Mr Hayward/Mr Huddy}105 and Hd.{Mr Hayward/Mr Huddy}217 deal with the treatment of knocks on existing dampers and Hd.{Mr Hayward/Mr Huddy}225 describes modifications to replenishing ball valves and oil feed to Ph.II front intermediate levers. W.P. 5 8 3 9 25 ) Six months. 28 58 14 84 184 184 [Handwritten] Hd.{Mr Hayward/Mr Huddy} will give us details of no. of split-piston dampers that have given trouble. HYDRAULIC LEAKS. June Quarter. C.C. - 1 - 17 18 ) 20 W.P. - - - 2 2 ) Previous " C.C. - - - 8 8 ) 8 W.P. - - - - - ) Six months. - 1 - 27 28 28 HYDRAULICS LOOSE ON FRAME. June Quarter. C.C. - 1 - 2 2 ) 8 Depot Sheet No.Hd.{Mr Hayward/Mr Huddy}183 deals with this trouble. W.P. - - - 5 6 ) Previous " C.C. - - - 5 5 ) 5 W.P. - - - - - ) Six months. - 1 - 12 13 13 HYDRAULIC ARMS LOOSE. June Quarter. C.C. - - - 19 19 ) 33 This is mostly due to lever boss fouling gland nut and splines are now modified to prevent this occurring. W.P. - - - 14 14 ) Previous " C.C. - - - 11 11 ) 26 W.P. - - - 15 15 ) Six months. - - - 59 59 59 | ||