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).
Instructions and suggestions for the re-assembly and testing of the S.U. Petrol Pump on the Phantom III.
| Identifier | ExFiles\Box 149\4\ scan0126 | |
| Date | 26th November 1936 | |
| 81203 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} File Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}13/AP.26.11.36. RE: INSTRUCTIONS FOR THE S.U. PETROL PUMP ON THE PHANTOM III. We agree with Mr.Kent's suggestion regarding the paragraph on Page.5. We do not, however, feel it is necessary to put in information as to testing the pump at a reduced voltage. At the top of page 6. as a last resort advice is given to dismantle the whole Magnet assembly but no information is given as to the method of setting the diaphragm on re-assembly. Our suggestions are as follows:- On re-assembly the diaphragm should be screwed in until the points do not break when it is pressed right home. The brass distance pieces having been inserted behind the diaphragm. The diaphragm should then be screwed back (anti-clockwise) hole by hole until the points just break when it is pressed slowly and firmly home. It should then be turned anti-clockwise a further four holes on the diaphragm edge and bolted onto the pump body, care being taken to see that the brass distance pieces are lying flush with the flange of the magnet housing, and that the diaphragm is held back to the end of its stroke with a wire or small screw driver under the inner arm U while the six nuts are tightened up. If it is found on releasing the arm U it does not move back on to the magnet pot casing, it should be gently assisted to do so. Page 5. From - In the event of trouble - no mention is made of a faulty fuse. We suggest it should read - In the event of trouble remove the contact covers C1 leaving the wires attached and investigate each side separately. It is suggested that a test be made with a 12 volt lamp from the fixing hole in the contact cover C1 to the pump body A.{Mr Adams} If there is no light when the ignition is switched on the fuse F1 in the cover should be removed and examined and the contacts to it verified. This being correct the earth connection to the pump body A.{Mr Adams} by way of the pipes should be examined and if there is still no light the fault must lie in the wiring from the battery to the pump and should be looked for. If current is found available between the hole in the contact cover and the pump body and the points on the Arms U & U1 are continued | ||