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).
Modifications and instructions for customer B.V cars, covering brakes and front springs.
| Identifier | ExFiles\Box 83\3\ scan0166 | |
| Date | 28th March 1941 | |
| JSD To Br.{T. E. Bellringer - Repair Manager} (Hythe Road) from Rm{William Robotham - Chief Engineer}/Clm{D. D. Clapham}). Copy to Rm.{William Robotham - Chief Engineer} and Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} MODIFICATIONS TO CUSTOMERS B.V CARS. -------------------------------- Herewith brief instructions to enable you to carry out the modifications, which further development has shown to be desirable, to Production B.V cars. Attached is a chart showing what modifications have been carried out at Belper. BRAKES ------ 1 - The diametral clearances of all pins in levers and the sideways clearances of all levers in jaws are to be .005". All pins and servo plate levers are to be chromium plated .001" thick (see drawing Rm.{William Robotham - Chief Engineer}611). 2 - In order to stop water entering the servo at the centre of the plate spring, two concentric shields are required one on the servo, the other, of a smaller diameter, on the gearbox, the form of the two depending on the type of gearbox. In the type of gearbox fitted to the first 12 chassis, the new pieces are Rm.{William Robotham - Chief Engineer}691, 2 and 3. The excluder Rm.{William Robotham - Chief Engineer}693 fits on to the pegs on the gearbox underneath the sealing washer Rm.{William Robotham - Chief Engineer}691. The outer excluder Rm.{William Robotham - Chief Engineer}692 is sweated on to the outside of the plate spring on the 4.150" diameter corrugation. In the case of gearboxes after the first 12 chassis, the new pieces are RG.{Mr Rowledge}2232, 3 and 4. The plate spring RG.{Mr Rowledge}2232 is merely substituted for the present type. The excluder RG.{Mr Rowledge}2233 is fitted on the gearbox underneath the modified oil seal housing RG.{Mr Rowledge}2234. 3 - In order to prevent oil from entering the servo, some 1/2" or 5/8" linen tape should be soaked in "1480" solution, obtainable from us, and wrapped round the outside of the servo to make a seal between the plate spring and the pressure plate. This is best done on the bench, and the servo should not be handled until the tape is dry. 4 - The brake shoe guide pins fitted to the dust covers on the rear brakes should be replaced by the new type of spring guides GS.3289 which are fitted to the same holes on the dust covers and clipped on to the inside of the shoes. FRONT SPRINGS - To prevent metal to metal contact in the front suspension on full bump, the following modification is required:- The buffer stop, FB.3544 should be modified by the fitting of an extra stiffener, FB.3612 or FW.1916, on the outside of the buffer stop, in | ||