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 the dashboard petrol filter and the petrol tank with reserve supply.
| Identifier | ExFiles\Box 106\2\ scan0017 | |
| Date | 1st April 1927 | |
| 4 DASHBOARD PETROL FILTER. DASHBOARD FILTER DISMANTLED. It is located in the pipe line between the vacuum feed tank and the carburetter float chamber, and is shown dismantled in the accompanying illustration. The filter should be cleaned every 5,000 miles, at the same time as the petrol tank filters and that arranged on the vacuum feed tank, as directed on page 37. Before dismantling, the valve on the top of the vacuum tank should be turned off. The knurled nut Qn should be released, and the stirrup Tp swung forward as shown, care being taken to hold the glass cover or sump Gs, or this will fall out. The filter element Fw can then be removed by releasing the knurled nut Fn, and withdrawing the element downwards. It should be cleaned by shaking and washing in petrol. The sump Gs should be carefully cleaned out. After replacing the parts and turning on the petrol supply again, the fuel may not rise readily in the glass sump, owing to entrapped air. This can be released by unscrewing the valve Rv half a turn or so, closing it again immediately the sump is seen to become filled. ROLLS-ROYCE LTD., DERBY. PETROL TANK WITH RESERVE SUPPLY. I (Insert in 20 H.P. Rolls-Royce Chassis Instruction Book dated April, 1927.) Petrol Tank with Reserve Supply. The petrol tank shown in the accompanying illustrations is provided with a reserve supply of two gallons. Its total capacity is 14 gallons. Use can be made of the two gallons reserve by turning the knurled knob Va so that its indicator points to the letter “R.{Sir Henry Royce}” Normally, it should stand at the position marked “ M ” (main), when, with the tank full, 12 gallons will be available. If the car be run with the tap in the “ M ” position until it stops through lack of petrol, the vacuum feed tank on the dashboard will have been emptied, and the mere act of turning the tap to the “ R ” position will not be sufficient to re-prime this tank. The engine must also be given a few turns by hand or by means of the electric starter motor, as explained on page 80, with the main throttle and the starting carburetter controls in the closed position. PETROL TANK. | ||