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 report on various vehicle brake faults, quantities by model, and remarks on modifications.
| Identifier | ExFiles\Box 130\1\ scan0123 | |
| Date | 31th March 1934 guessed | |
| - 2 - BRAKES SEIZE - REAR. 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. March Quarter. C.C. - 19 - 2 21) W.P. - 13 - 1 14) 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 footbrake on synchromesh cars. See Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}246. Bronze Bush now being fitted to replace white metal bearing. Previous Quarter. C.C. - 17 - - 17) W.P. - 9 - - 9) 26 Six Months. - 58 - 3 61 61 BRAKES THUMP. March Quarter. C.C. - 11 - 4 15) W.P. - 1 - - 1) 16 Previous Quarter. C.C. 1 14 - 4 19) W.P. - 1 - - 1) 20 Six Months. 1 27 - 8 36 36 BRAKES INEFFICIENT. March Quarter. C.C. 4 67 1 36 108) W.P. - 22 - 9 31) 139 Inefficiency on 20/25 is usually due to oil on servo. Oil feed to servo is now deleted on new cars and Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}253 has been issued instructing retrospective action. Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}252 describes treatment for inefficient servos. Oil guards to Depot Sheets Nos. Hd.{Mr Hayward/Mr Huddy}224 and Hd.{Mr Hayward/Mr Huddy}232 are being fitted. Previous Quarter. C.C. 1 64 3 27 95) W.P. - 10 1 5 16) 111 Six Months. 5 163 5 77 250 250 SERVO INEFFICIENT, ALSO JAGGERS AND GRABS. March Quarter. C.C. - 16 2 11 29) W.P. - 11 - 2 13) 42 Previous Quarter. C.C. 1 19 4 8 32) W.P. - 18 - 11 29) Six Months. 1 64 6 32 103 103 | ||