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).
Parts required for fitting a Non-Return Ball Valve to the front hydraulic shock damper on a 20/25 HP chassis.
| Identifier | ExFiles\Box 105\3\ scan0184 | |
| Date | 29th May 1931 | |
| PHG E.G.Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} J5520 BY/HEB{H. Biraben}15/M.29.5.31. 20/25 HP. CHASSIS. FRONT HYDRAULIC SHOCK DAMPER SEC:7160. H Further to our memo' BY/HEB{H. Biraben}12/M.8.5.31, kindly note that the Non-Return Ball Valve should now be fitted, and the following existing parts will be required:- F.83159 Valve Cover Plug H.P. 2 off, replacing F.83621. F.83160 " " " L.P. 2 " F.83622. F.57600 Adjusting Screw Ball Valve. 4 " ADDITIONAL. E.81516 Joint Washer. 4 " .1875 Dia:Steel Balls H.P. & L.P.Valves. 4 " It will also be noticed that F.83621 and F.83622, issued previously in the above mentioned memo' will be no longer required. BY/HEB.{H. Biraben} | ||