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).
Issues and solutions for the oil supply to non-hydraulic tappets on the Phantom III 'D' series.
| Identifier | ExFiles\Box 131\3\ scan0116 | |
| Date | 10th August 1939 | |
| 1113. Swdd File c. Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}1/G.10.8.39. PHANTOM III. NON-HYDRAULIC TAPPETS. 'D' SERIES ONWARDS. The L.A. modification for cutting down the oil supply to the rockers has been found to be too drastic, with the result that cars have come in with several of the push rods rusted up and squeaking, the trouble being, that after a short mileage the wear and load factor with the supply hole on the underside of the rocker almost seals the supply. Two schemes have been tried to overcome this feature :- (1). Grooves milled in the rocker shaft to correct the supply from the rocker bearing to the push rod end of the rocker. This was fairly satisfactory, but is expensive. (2). Reverted to the previous Ph.lll practice i.e. fitted felt pellets to the rocker valve end, and restored the original design of position of lubricating holes in the rocker shaft. This scheme has been satisfactory in replacing a good supply of oil to the push rods, and keeping the excessive oil from the valves. Several cars have been treated in this way. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||