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).
Excessive tappet roller wear on Phantom and 20 HP engines due to oil shortage, and the recommended lubrication procedure.
Identifier | ExFiles\Box 66a\2\ scan0012 | |
Date | 28th January 1926 | |
To BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} c. to Wor.{Arthur Wormald - General Works Manager} c. to Mx.{John H Maddocks - Chief Proving Officer} X8060 Hs{Lord Ernest Hives - Chair}1/LG28.1.26. PHANTOM AND 20 HP. TAPPET ROLLER CLEARANCE. X8060 With reference to the excessive wear which takes place after a few hours running on test engines, we can only explain this by the fact that sometime during the run there is a shortage of oil. We have examined both 20 HP. and 40/50 HP. cars which have run 20,000 to 30,000 miles, and they shew nothing like the amount of wear we have seen on test cars after 2 or 3 hrs. running. We recommend that instructions are issued that on both engines, before the tappets are fitted, they should be dipped into a tin of oil. When the first oil is put into the engine, one quart should be poured on to the top of the cylinder head so that it drains into the crankcase via the tappets. During the first runs of the engine, a generous supply of oil should be poured on to the cylinder head so that there is no risk of the tappets not getting sufficient oil. It is quite conceivable that unless special precautions are taken it will be some time before there is sufficient spray in the crankcase to lubricate the tappets. Hs.{Lord Ernest Hives - Chair} | ||