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).
Page detailing adjustments, oil levels, and troubleshooting for a shock absorber system.
| Identifier | ExFiles\Box 28\1\ Scan094 | |
| Date | 22th June 1926 guessed | |
| -17- passages G to the high pressure end. When the road spring extends, and the axle moves away from the frame, the piston moves towards the high pressure end of the cylinder A, N being a non-return valve, remains closed. The high pressure valve B then lifts and oil is forced via passage K to the low pressure end of the cylinder P. Any oil which escapes past the piston during its movement is replaced by means of the non-return ball supply valves LL, which operate only under suction and are in connection with the reservoir of oil filtered by gauge O.{Mr Oldham} (b) Adjustments and rectification of possible troubles. The correct level to which the shock absorber should be filled is indicated by plug F.{Mr Friese} After every 2500 miles running this plug should be removed and the necessary quantity of oil inserted to raise the oil level overflow to this point. The only accessible adjustment on this shock damper is that of the load at which the high pressure valve lifts. This adjustment can be made by removing the cap over this valve and substituting another spring. Care should be taken in replacing the spring that it fits satisfactorily over the valve head - otherwise too great a load will be obtained. Any lost motion of an H indicates either that - (i) Air has got into the system. In this case passage C should be inspected to see that this is not blocked up. (ii) The supply valves L are not working correctly. These should be inspected to see that the balls have free movement. | ||