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).
Summary report on brake system faults and modifications for various car models over a six-month period.
| Identifier | ExFiles\Box 130\1\ scan0109 | |
| Date | 31th December 1933 guessed | |
| - 2 - BRAKES SEIZE - REAR. 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. December Quarter. C.C. - 17 - - 17) V.P. - 9 - - 9) 26 Previous Quarter. C.C. - 30 - 2 32) V.P. - 5 - 1 6) 38 Six Months. - 61 - 3 64 64 Modification to 20/25 rear brake shaft bearing is being carried out on all cars as they become available. Depot Sheets Nos. 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. BRAKES THUMP. December Quarter. C.C. 1 14 - 4 19) V.P. - 1 - - 1) 20 Previous Quarter. C.C. 1 11 2 8 22) V.P. - - - - -) 22 Six Months. 2 26 2 12 42 42 BRAKES INEFFICIENT. December Quarter. C.C. 1 64 3 27 95) V.P. - 10 1 5 16) 111 Previous Quarter. C.C. 8 89 2 47 146) V.P. 1 8 - 8 17) 163 Six Months. 10 171 6 87 274 274 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. SERVO INEFFICIENT, ALSO JAGGERS AND GRABS. December Quarter. C.C. 1 19 4 8 32) V.P. - 18 - 11 29) 61 Previous Quarter. C.C. 1 27 6 12 46) V.P. - 26 - 9 35) 81 Six Months. 2 90 10 40 142 142 | ||