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).
Summary report on hydraulic system complaints for the September quarter, categorized by fault type and vehicle model.
| Identifier | ExFiles\Box 47\3\ Scan258 | |
| Date | 30th September 1931 guessed | |
| -2- TOTAL HYDRAULIC COMPLAINTS. 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. Remarks September Quarter. C.C. 21 22 14 62 | 119 } 136 W.P. - 1 - 15 | 17 } Previous " C.C. 29 40 16 48 | 133 } 140 W.P. - 2 2 3 | 7 } Six months. 50 65 33 128 276 276 HYDRAULIC KNOCKS. September Quarter. C.C. 21 21 13 48 | 103 } 113 W.P. - 1 - 9 | 10 } Previous " C.C. 29 37 16 35 | 117 } 124 W.P. - 2 2 3 | 7 } Six months. 50 61 31 95 237 237 This matter is in the hands of the Experimental Department for further investigation. Depot Sheets Hm.{Capt. W. Hallam - Head Repairs}105 and Hd.{Mr Hayward/Mr Huddy}217 deals with the treatment of knocks on existing dampers. New split piston type shock damper now being introduced on Production and should reduce these troubles. HYDRAULIC LEAKS. September Quarter. C.C. - 1 - 7 | 8 } 9 W.P. - - - 1 | 1 } Previous " C.C. - 3 - 5 | 8 } 8 W.P. - - - - | - } Six months. - 4 - 13 17 17 HYDRAULICS LOOSE ON FRAME. September Quarter C.C. - - 1 7 | 8 } 14 W.P. - - 1 5 | 6 } Previous " C.C. - - - 8 | 8 } 8 W.P. - - - - | - } Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}183 deals with this trouble. Six months. - - 2 20 22 22 | ||