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).
Supply issues, failure causes, and repair procedures for S.U. Petrol Pumps.
| Identifier | ExFiles\Box 149\4\ scan0377 | |
| Date | 14th July 1937 | |
| W/P To SR/VA. 1263 also 1245 Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}14/JH.14.7.37. S.U. Petrol Pumps. In reply to your memo. Sr/VA.4/GM.9.7.37. We are having an end cutter and bush to centralise the S.U. magnet units and will despatch the same to you as soon as it is completed. Hancock reports that you have been unable to obtain G5 oil silk diaphragm assemblies through the shipping office. We are sending you 24 complete assemblies and a supply of rollers to ease the present situation. Your difficulty no doubt has been due to the fact that the S.U. pump is bought as a complete unit and no spares are supplied or issued in the ordinary course, the faulty pumps are returned to the S.U. Co. for repair. Regular arrangement will have to be made to enable you to obtain spares for the following reason. A pump that has failed is invariably due to the armature fouling the side of the pot and pole piece due to this being out of centre and causing a side load and consequent wear of the brass rollers and possibly the armature itself. If the pump is merely reassembled using the same parts with the exception of the Fabric. It may run for sometime owing to the different relative positions of the worn parts but it will soon fail again from the original cause. Thus your only hope of affecting a cure is to centre the pot with the end cutter and at the same time replace all worn parts. Another point is that the spindle should stand truely at right angles from the armature. If in future you have difficulty in obtaining replacements will you let me know and I will see that we can arrange. Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} | ||