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).
Issues and modifications related to the chassis lubrication system and the front and rear brakes.
| Identifier | ExFiles\Box 101\2\ scan0051 | |
| Date | 20th July 1936 guessed | |
| ( II ) similar bumps. The buffer clearances are adequate. The loss of clearance during the mileage was 3/16" at the rear and none at the front. The springing of this car is not up to standard. CHASSIS LUBRICATION SYSTEM. PRESSURE PIPING LOP F.60075. Complete to above LOP - Standard Production. The end of the flexible coiled pipe leading to clutch casing bijur connections broke off close to the olive union. It would appear that the coil provides sufficient flexibility & the breakage may have been due to the pipe being fitted in a strained position, but it is a point that needs to be carefully watched. It has given us no further trouble. A fracture subsequently occurred in the coiled pipe at the front end of the NSR. road spring. This was due to the coil being a bad fit in the circular housing & therefore losing flexibility. FRONT BRAKES. LOP G.56807 Complete to above LOP - Standard Production. REAR BRAKES. LOP G.56534. Complete to above LOP incorporating:- NS.{Norman Scott}4772 Mod. to Brake adjustment to prevent burring of looking piece. G.56903 Looking Piece mod. to give clearance with G.80960 Mud Excluder. Thumps were experienced at first, but since tightening the lower bearings of the axle controls when the new axle was fitted at 10,146 miles, there has been no recurrence of this trouble. Trouble was experienced with the drums rubbing the carrier plates on corners until the clearance was increased. New front brakes were fitted with the new axle, and these required re-lining after 7,000 miles use. The linings were worn down and had moved slightly on the rivets. During a run when the brakes were extensively used, we experienced a partial seizure of the OSR. It was necessary to wait for 15 minutes to cool when we were able to proceed. Squeaks developed after they had over-heated in the front and OSR. brakes and it was found that the poundage of the pilot shoes was down in these brakes. These were increased and the brakes were then free from squeaks. The poundage is now approximately 45 lbs. on each pilot shoe. We attribute the rapid wear & heating troubles to the increased acceleration and speed available with the large bore engine, necessitating more frequent use of the brakes. If they are not used excessively, the brakes are very good in all respects, & we think they are adequate for this type of car. The drains at the bottom of the rear carrier plates are badly damaged by stones. The brake adjusters were satisfactory. | ||