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).
Instructions for modifications to hydraulic shock dampers on the 20/25 HP chassis 18-G-4.
| Identifier | ExFiles\Box 105\3\ scan0143 | |
| Date | 24th November 1930 | |
| RHC{R. H. Coverley - Production Engineer} c. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} XS520 BY/HEB{H. Biraben}1/M.24.11.30. 20/25 HP. CHASSIS 18-G-4. REDUCED MOVEMENT OF BALL VALVES AND ADDITION OF FILTER TO VALVE IN HYDRAULIC SHOCK DAMPERS. REAR HYDRAULIC SHOCK DAMPER SEC: 7150. FRONT HYDRAULIC SHOCK DAMPER SEC: 7160. Further to our memo. BY/HEB{H. Biraben}9/M21.11.30, please receive herewith one Blue Print of each of the following drawings detailed to Scheme 1406 as proposed for future Production.- SEC:7150/7160.- F.57599 Valve Cover Plug. which replaces F.74642. F.57600 Adjusting Screw(Ball Valve). " " F.77983. F.57601/2/3 Joint Washer(Valve Plug)Alternative to F75143/45. SEC:7150 ONLY.- F.57604 Spring(H.P. Valve). which replaces F.76548. SEC:7160 ONLY.- F.57605 Spring(H.P. Valve). which replaces F.54807. Will you please instruct up the above parts for use on Chassis 18-G-4 together with the following existing parts.- SEC:7150.- E.75760 Joint Washer(Adjusting Screw)2 off,which replaces E53551. F.78476 Cage(Air Release Filter). 2 " ADDITIONAL. F.78477 Washer( " " ). 2 " " F.78478 Gauze( " " ). 2 " " SEC:7160.- E.75760 Joint Washer(Adjusting Screw)2 off,which replaces E53551. F.78476 Cage(Air Release Filter). 2 " ADDITIONAL. F.78477 Washer( " " ). 2 " " F.78478 Gauze( " " ). 2 " " Remainder of parts to complete Sec:7150 are standard to LOP.F.56649 and for Sec:7160 to LOP.F.55944. Please note that this instruction is alternative to the temporary scheme issued in earlier memo. Our instructions for this Scheme applied to the 20/25 HP.Chassis are now complete except for the items (a) and (b) referred to in memo' BY/HEB{H. Biraben}9/M.21.11.30, which will be attended to as soon as possible. BY/HEB.{H. Biraben} 4482 | ||