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).
List of oil leaks and other mechanical issues such as jammed radiator shutters and a sticking carburettor throttle.
| Identifier | ExFiles\Box 71\4\ scan0043 | |
| Date | 4th March 1925 guessed | |
| - 2 - 1. From the dynamo drive. 2. Slight sweating from valve cover holding down nuts, and from the face of this cover. 3. From the ignition relay servo oil filter washers. (This was cured by facing up the fibre washers). 4. Slight leaks from aluminium cap of ignition relay servo. (Cured by taking burrs off the faces) 5. Very slight leak from ignition relay servo cap at the bearing of the shaft operating advance and retard mechanism. This leak is so small as to be almost negligible. 6. Slight leaks from joint between front timing case and bottom half. 7. Slight sweating from several oil pipe unions. 8. Very slight leaks from crank case where the shafts operating carburettor controls pass through it. Radiator shutters. These jammed only because of an accumulation of sand and small stones on the bottom bearing plate of the shutter frame. It is necessary to clean this out before the shutters will work again. There is very little clearance between the bottom of the shutters and the top of the plate. It would probably help to prevent this if the shutters were made so that there is more clearance between their lower ends and the plate which carried the bearings. Carburettor throttle sticking. We have not had a recurrence of this trouble since we fitted a new spring on the throttle operating lever from the governor to replace the one that was broken at Le CanadelHenry Royce's French residence. We have carefully looked over all the controls, but cannot find any trace of stiffness, or anything else that could prevent the throttle from closing. It may be that the suction on the throttle is almost sufficient to keep it open against the return spring, and that some other element such as dirt in the controls, is just sufficient to prevent the throttle from closing against its return spring. I remember 93 NK in Derby at one time was very susceptible to this trouble. The throttle return spring was quite strong enough to close the throttle when the engine was stationary, but when the engine was running the suction on the throttle was sufficient to counteract the effort of the return spring, and the throttle would not close. We will investigate this further on 98 NK, when the car comes in to-night. A.J.LIDSEY. | ||