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).
Condition report on various mechanical components including cylinders, levers, and valves.
| Identifier | ExFiles\Box 1\4\ B001_X 100a-page255 | |
| Date | 19th January 1933 | |
| -2- Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}8/KT.19.1.33. In the case of the N.S. rear the bottom was slightly scored. The expanding discs were O.K. The contact surface of each wearing pad was slightly grooved, the maximum depth recorded being .0015". One or two of the pads were also slightly "flaked". Cylinders. The bores were highly polished locally, corresponding to the pistons, also the N.S. rear was scored similarly to the piston. In all cases there were light scratches near the well, from which there were no resulting marks on the piston, except in the one case reported. When extracting the piston, it was found that in nearly every case there was a tight spot at the top of the cylinder bore close to the inter-lever opening, it was necessary to expand one of the cylinders in hot water before the piston could be released. This tight place would in no way interfere with the action of the piston in its normal working position, and may have been caused by the inter-lever at maximum stroke before the damper was filled with oil. Intermediate Levers. The surfaces in contact with the piston wearing pads were excellent and showed no appreciable wear. The bores into which the rocking shafts fitted were scored, and in the case of the front dampers, the keyways were damaged. Main Levers & Ball End Pins. The main levers had not suffered to the same extent as the interlevers from the slackening of the biting-in bolts, and the consequent damage to the keys. The ball pins, however, were worn .002" to .004" on the contact surfaces, scoring being observed on the N.S. front only. Valves Etc. The valves, and valve "hats", were in perfect condition, as also were the valve seats in the chambers. There was no evidence of wear having taken place between the valve stems and the guides. | ||