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).
Statistical summary of brake-related issues, including seizing, thumping, and oil leaks, with accompanying technical remarks and proposed modifications.
| Identifier | ExFiles\Box 130\1\ scan0135 | |
| Date | 1st June 1934 guessed | |
| - 2 - BRAKES SEIZE - REAR. | | 25 HP. | PH.II | TOTAL. | AND TOTAL. | REMARKS. | |---|---|---|---|---|---| | June Quarter. | C.C. 25 | 2 | 27) | 35 | Modification to 20/25 rear brake shaft bearing is being carried out on all cars as they become available. Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}220. New 20/25 cars have improved lubrication scheme to outer bearings. Also increased clearance being given to foot-brake on synchromesh cars. See Depot Sheet Hd.{Mr Hayward/Mr Huddy}246. Bronze bush now being fitted to replace white metal bearing. | | | W.&P. 8 | - | 8) | | | | Previous Quarter. | C.C. 19 | 2 | 21) | 35 | | | | W.&P. 13 | 1 | 14) | | | | Six months. | 65 | 5 | 70 | 70 | | BRAKES THUMP. | | | | | | | |---|---|---|---|---|---| | June Quarter. | C.C. 12 | 1 | 13) | 14 | | | | W.&P. 1 | - | 1) | | | | Previous Quarter. | C.C. 11 | 4 | 15) | 16 | | | | W.&P. 1 | - | 1) | | | | Six Months. | 25 | 5 | 30 | 30 | | BRAKES - OIL LEAKING ON TO AND PULLING TO ONE SIDE. | | | | | | | |---|---|---|---|---|---| | June Quarter. | C.C. 14 | 2 | 16) | 18 | 20/25 HP. The trouble seems to be due to oil from the pivots running down the cross steering lever into the slot in the dust cover. This slot to be deleted Ph.II. Chiefly due to leakage from the lower pivot cap. | | | W.&P. - | 2 | 2) | | | | Previous Quarter. | C.C. 13 | 6 | 19) | 28 | | | | W.&P. 6 | 3 | 9) | | | | Six Months. | 33 | 13 | 46 | 46 | | | ||