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).
Servicing instructions for petrol pumps, brakes, and the Bijou system.
| Identifier | ExFiles\Box 139\3\ scan0244 | |
| Date | 16th May 1940 | |
| To Rm{William Robotham - Chief Engineer}/AA.{D. Abbot-Anderson} from Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby}5/JMc.16.5.40. SERVICING INSTRUCTIONS. PETROL PUMPS, BRAKES AND BIJOU SYSTEM. S.U. Petrol Pumps. With the pumps switched on, but the engine not running, three or four clicks a minute are permissible; if more frequent, then a valve is probably sticking. The valve assemblies can easily be removed from the top of the casing by removing first the plug and then the valve retaining clip. After ensuring that the parts are clean, replace them making sure that the disc valves have their smooth sides downwards and the clip is correctly located in its groove. The thin red washer is under the valve cage, and the thick orange coloured one above. If the pump is noisy with the engine idling, there is probably an air leak on the suction side of the system. The pump should next be run on each side of 8 volts; failure here will probably be due to dirty points. These should in any case be examined by removing the spring contacts inside the bakelite end caps. Ordinary wear up to 1/32" does not matter if the pumps work on low voltage, but stepped points must be renewed. On replacing the spring contact, ensure that it lies flat on the bakelite pedestal with contacts apart, but that it can be easily raised by the actuating contact. After 50,000 miles, the pump should be sent to the makers or to R-R's for overhauling, when new diaphragms and contact points will be fitted. If laying up the car for over a month, the petrol system should be completely drained, as petrol gum dissolves the neoprene diaphragms rendering the pumps useless. | ||