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).
Complaints of noisy clutch trunnion bearings on the Phantom III due to a lack of lubrication, with a proposed solution.
| Identifier | ExFiles\Box 93\3\ scan0410 | |
| Date | 17th February 1938 | |
| To By c. to Hs.{Lord Ernest Hives - Chair} c. to Da.{Bernard Day - Chassis Design} c. to Mx.{John H Maddocks - Chief Proving Officer} 312 RM{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}11/JH.17.2.38. CLUTCH TRUNNION BEARING PHANTOM III. We have a number of complaints of noisy thrust bearings. Examination has revealed that the majority of noisy bearings suffer from lack of lubrication. It appears probable that oil fed in from the top of the trunnion creeps down the inside face of the housing, and escapes without reaching the inside of the bearings. Attached (to Hs{Lord Ernest Hives - Chair}'s. copy) is GCD.330 which shows a scheme for taking the oil to the bottom, by means of an annular groove, so that it is bound to reach the inside of the bearing before it can escape or overflow. This scheme has been instructed experimentally, but no conclusive results could be arrived at without considerable mileage on several cars, because in a case of this sort, individual results vary so much and we therefore suggest that this scheme be put into production at once, as it can hardly fail to insure more definite lubrication of the bearings. If you agree to this we will supply the information for a Depot Sheet, so that Depots can carry out the modification when it becomes necessary to dismantle in order to replace the bearing. We are today fitting this scheme to 32-EX. RM{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||