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).
Over-oiling, noisy tappets, and clutch jaggers.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan233 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT -2- Expl. No. REF: Hs{Lord Ernest Hives - Chair}5/LG1.12.25. In the case of worn bearings, there is definitely less oil thrown out when the three bearings only are supplied. We cannot look upon over-oiling as peculiar to the Phantom, because at the present moment they are having more trouble on production with 20 HP: chassis over-oiling than they are on the Phantom. We have recently been running a Silver Ghost chassis for comparative tests on over-oiling and we find that the oil consumption on that car is only 500 m.p.g., although the car has been run about for years, with no complaint of over-oiling. The investigation of over-oiling trouble is being carried out continuously. Tappets noisy. There is no doubt that there is difficulty in obtaining consistently quiet tappets. We feel that the location of the Phantom tappet is not as good as it might be. The problem of noisy tappets has been with us always. Some time ago it was agreed to try tappets experimentally in which the clearance was automatically adjusted by oil pressure. We consider it would be worth while going on with this experiment. Clutch jaggers. One frequent cause of clutch jaggers on the Phantom is uneven adjustment of the levers withdrawing the clutch plate. We find it needs an expert to adjust these levers correctly. With a complete car it is very difficult to get at to check or adjust the levers evenly. Correct adjustment of the clutch levers is not by any means a complete cure for jaggers, contd:- | ||