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).
Updates to the 20 HP Instruction Book regarding lubrication and engine tappet adjustments.
| Identifier | ExFiles\Box 26\2\ Scan281 | |
| Date | 19th March 1928 | |
| W/S. Sg.{Arthur F. Sidgreaves - MD} from BY/R.W. C. to Hs.{Lord Ernest Hives - Chair} X5782 BY/NW{N. Walker - Patents}2/MB19.3.28. Re 20 H.P. INSTRUCTION BOOK Referring to your Sg{Arthur F. Sidgreaves - MD}9/W/13.3.28; Hs.{Lord Ernest Hives - Chair} is not in agreement with the suggestion that we should instruct more liberal lubrication of the spring gaiters. He says that this would only result in an increase of oil leakage. Since sending the revised Instruction Book to you with our BY/Cgh{W Clough}2/G3.3.28, we have been asked by the Repair Dept. to add a warning that after removal of the cylinder head several subsequent adjustments of the tappet clearances may be necessary. We suggest the addition, at the end of Chapter V in the 20 h.p. book dated April 1927, of the following:- " It is advisable to repeat this inspection of the clearances during the next few hundred miles of running, re-adjusting if necessary. Further, if the car should have been returned to the makers for decarbonising, or any other purpose involving removal of the cylinder head, it is very desirable, afterwards, that the owner should inspect the tappet clearances when he has run the car a certain amount. In spite of the fact that the car will have been carefully tested by the makers after overhaul, the amount of running involved may have been insufficient to ensure that the joint gasket has entirely settled down". Similar matter will also be incorporated in a leaflet for distribution by the Repair Dept. in connection with 40/50 h.p. or 20 h.p. chassis which have been in for | ||