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 for cleaning and maintaining the petrol tank filters with a reserve supply, and a description of the dashboard petrol filter.
| Identifier | ExFiles\Box 106\2\ scan0018 | |
| Date | 26th March 1928 guessed | |
| 2 PETROL TANK WITH RESERVE SUPPLY. When the tap is turned to the letter “O” it is in the “off” position and the main petrol tank is shut off from the vacuum feed tank. Two independent filters are provided, that enclosed within the tube Tm being on the “main” supply, and that within the tube Tr{Capt. F. W. Turner - Finance} being on the “reserve” supply. In the cross sectional view of the tank the “reserve” filter is shown in section in order to make clear how removal of the gauze is effected for cleaning. The detail arrangements of both filters are identical. PETROL TANK FILTERS. To remove the filters for cleaning every 5,000 miles, as directed on page 37, the union Un should be disconnected and the five screws Sc removed. The two filters may then be lifted out of the tank, care being taken not to damage the leather joint washer. PETROL TANK WITH RESERVE SUPPLY. 3 Each gauze is retained in position by a knurled nut Kn{D. G. McKechnie - Sales}, which is prevented from coming adrift by a split cotter. After removal of the latter, and unscrewing the knurled nut, the gauze may be removed, care being taken not to lose the small coil spring Sp{Mr Spinney}, which is arranged on top of the gauze carrier Gc. This can now be removed and the gauze Z cleaned. During this operation care must be taken not to damage the gauze, which is of a very fine mesh and somewhat fragile. Cloth of a fluffy nature should not be used as particles of fluff are liable to be left adhering to the gauze. The best plan is to wash the gauze in petrol or paraffin, using a brush. When replacing the filters in their tubes care must be taken that the spring Sp{Mr Spinney} is in position on each. The knurled nuts Kn{D. G. McKechnie - Sales} are intended for turning with the fingers only, and on no account must any tool be used on them. After they are replaced, brass split cotters must be fitted in the holes provided. When replacing the filters in the tank, care must be taken that the leather joint washer is in position. After prolonged use, it is advisable to drain the main tank by removing the plug Pl, which is situated immediately below the filters. This will flush out any accumulation of sediment or water. Owing to the large area and fine mesh of the filters no inconveniences are likely to arise from filling up direct from a pump, adequate filtering arrangements usually being incorporated in these. When filling from an ordinary two-gallon can it is advisable to make use of a filter funnel. The large filler spout is closed by a screwed cap Fr, which is adapted for turning with the hands only. A suitable air vent is provided in the end of this spout. The cap should be screwed on tightly in order to utilise the friction locking plate which is fitted inside it. The fuel level gauge l is float operated, and indicates at a glance the quantity of fuel present in the tank. Dashboard Petrol Filter. Mounted on the front of the dashboard, under the steering column, is a filter of the type in which the fuel is caused to flow between the faces of adjacent metal washers. Small protuberances on these faces result in very small clearances being formed between the washers when they are clamped together. This filter replaces that shown on the carburetter float chamber in Figs. 21 and 22. | ||