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).
Troubles experienced with hydraulic adjustable tappets on a Cadillac engine.
| Identifier | ExFiles\Box 125\2\ scan0222 | |
| Date | 11th March 1935 | |
| X1729a To Sg.{Arthur F. Sidgreaves - MD} from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} c. to Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} c. to HV. c. to RP. c. to MX.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}12/KW.11.3.35. Cadillac. Re The Hydraulic Adjustable Tappets. Having reported fully upon the troubles experienced during the 6,000 miles with the hydraulic tappets (the actual mileage of the tappets up to that date being 12,043) in report reference Chateauroux, 10th December, 1934, I did not consider that a detailed report during the latter 6,000 miles of troubles experienced would be of the same value, considering the fact that we had a lot of trouble with the gudgeon pins and bushes. The metal worn off the bearings had got into the oiling system, which it was almost impossible to get rid of without dismantling the whole of the engine. The troubles we experienced during the latter part of the mileage with the hydraulic tappets were entirely due to foreign matter. We did eventually get rid of it by dismantling the rockers and the filter, washing carefully in paraffin each time. The hydraulic tappets then gave no further trouble during the remaining mileage. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||