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).
Oil leaks from the Bijur chassis lubrication system onto the Phantom III front brake linings.
| Identifier | ExFiles\Box 92\4\ scan0186 | |
| Date | 23th June 1936 | |
| To By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Mx.{John H Maddocks - Chief Proving Officer} X306 Hs{Lord Ernest Hives - Chair}/AFM.{Anthony F. Martindale}17/KW.23.6.36. Phantom III Front Brakes. The Test Dept. have had several cases of oil from the bijur chassis lubrication system getting on to the front brake linings. This occurs when the bijur pump is pressed, the steering assembly being already primed. Oil leaks past the felt washer at the top of the king-pin, and gets inside the brake drum in two ways. :- (1) The oil manages to percolate through the small gaps between the plate G.83397 and the hub pivot. Pending the re-design of these parts we suggest that if the joint was made with "Heldite" it would be oil-tight. At present a packing piece is used between plate and pivot; both sides, of this should be free from paint and treated with "Heldite". (2) Oil lodges on the edge of the plate G.83402 and seeps through the gap between this and G.83397. At present no effort is made to render this joint oil-tight, but if both plates were faced and the joint made with "Heldite" or Vellumoid, oil should not get through. It is also possible to fit a thin deflector shield to prevent oil dropping off the bottom of the king-pin onto this joint, if it is thought necessary. Hs{Lord Ernest Hives - Chair}/A.F.Martindale. | ||