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).
Front brake mechanism wear after 12,900 miles in France for chassis 6BTV.
| Identifier | ExFiles\Box 83\2\ scan0037 | |
| Date | 20th May 1937 | |
| CHASSIS 6BTV FRONT BRAKES TO L.O.P. GB. 1234 ExI 156 DETAILS OF FRONT BRAKE MECHANISM SHOWING WEAR AFTER 12,900 MILES IN FRANCE OILITE BUSHES - BALANCE LEVER (GB 2388): N.S. WEAR ON INNER END .008" WEAR ON OUTER END .002" SPINDLE GB 2338 WEAR ON INNER END .002" WEAR ON OUTER END .005 MAXIMUM CLEARANCE .014" O.S. MAX. WEAR (OUTER END) .003" SPINDLE GB 2338 MAX WEAR (OUTER END) .002" MAXIMUM CLEARANCE .009" INITIAL CLEARANCE IS .004" .375" DIA. HOLE: N.S. WEAR IN HOLE .011" WEAR ON PIN KL704 .009" INCREASE IN CLEARANCE .021" O.S. WEAR IN HOLE .022" WEAR ON PIN KL704 .007 INCREASE IN CLEARANCE .029 WEAR IN BORE OF BUSH GB 2025. (BEARING FOR ACTUATING LEVER GB1090): N.S. WEAR IN BORE .004" WEAR ON ACTUATING LEVER NIL CLEARANCE .006" O.S. WEAR IN BORE .009" WEAR ON ACTUATING LEVER NIL CLEARANCE .011" WEAR IN CONNECTING LINK HOLE: N.S. WEAR IN HOLE .009" WEAR ON PIN K.6713 .005 CLEARANCE .019" O.S. WEAR IN HOLE .009" WEAR ON PIN .004 CLEARANCE .017" THE HOLE AT THE LARGE END IS WORN .011 ON O.S. LINK. ACTUATING LEVER (G.B. 1090): WEAR IN TOGGLE SHAFT BORE: N.S. MAXIMUM .005", WEAR ON TOGGLE SHAFT NEGLIGIBLE, CLEARANCE .009" O.S. MAXIMUM .006", WEAR ON TOGGLE SHAFT NEGLIGIBLE, CLEARANCE .010" INITIAL CLEARANCE .004" WEAR IN TRUNNION BORE: N.S. MAX. .010", ON TRUNNION .012", CLEARANCE .031" O.S. MAX. .007", ON TRUNNION .008", CLEARANCE .025" INITIAL CLEARANCE .009" ADJUSTING CAMS WERE BURRED OVER .010" ON THE N.S. AND .008" ON THE O.S. BUT WORKED QUITE FREELY. ROLLS-ROYCE, LTD. PRINT ROOM, 21 MAY 1937 DERBY. | ||