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 table of hydraulic system faults and their remedies over a six-month period.
| Identifier | ExFiles\Box 130\1\ scan0312 | |
| Date | 31th December 1935 guessed | |
| - 6 - HYDRAULIC KNOCKS. 25 HP. PH.II. TOTAL GRAND TOTAL. REMARKS. December Quarter. C.C. 32 19 51) G.P. 5 5 10) 61 Knocks on existing dampers are being satisfactorily dealt with by modifying the replenishing ball valves and fitting oil feeds to intermediate levers as per Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}225. The split piston type now being produced appears satisfactory in service. Previous Quarter. C.C. 36 25 61) G.P. 4 1 5) 66 Six Months. 77 50 127 127 HYDRAULIC LEAKS. December Quarter. C.C. 5 3 8) G.P. 1 - 1) 9 Previous Quarter. C.C. 12 4 16) G.P. 1 - 1) 17 Six Months. 19 7 26 26 HYDRAULICS LOOSE ON FRAME. December Quarter. C.C. 14 - 14) G.P. 1 - 1) 15 Larger diameter bolts now being fitted on Production to overcome this complaint. Previous Quarter. C.C. 3 - 3) G.P. - - -) 3 Six Months. 18 - 18 18 HYDRAULICS - FAILURE OF CONTROL. December Quarter. C.C. 4 1 5) G.P. 2 - 3) 8 These are rectified by cleansing the system generally and curing minor oil leaks. Previous Quarter. C.C. 8 10 18) G.P. - - -) 18 Six Months. 14 12 26 26 | ||