AIR CLEANERS AND FUEL SYSTEM-N.3 FUEL OIL FILTERS The element in this f:lter is of the paper type ane. therefore no attempt should be made to clean it. Its life will be governed by the quality and condition of the fuel passing through it. but under average con- ditions the element should be renewed in accordance with the recommended Periodical At:entions given on Page C.2. This period would naturally be reduced if it was apparent from the condition of the element if removed and inspected. that conditions warranted it. I On early engines the filter element is contained inside I a filter bowl, (Fig. N5).
On later engines the filter I element is situated between the filter head and the I bottom cover, (Fig. N6). To Renew the Filter Element 1 . 2. Clean the outside of the filter. Release the setscrew in the centre of the filter head. Lower the filter bowl, (Fig. N5) or the bottom cover, (Fig. N6) depending on which type of filter is used and discard any fuel together with the used filter element. 3. .J J J 1 4. Clean the inside of the filter head and the inside of the filter bowl or bottom cover. 5. Inspect the seals and renew them if they are damaged. Place the new filter element inside the bowl or put the bottom cover on the bottom of the new filter element.
Offer up the filter bowl or element assembly to fit centrally on the seal in the filter head. Hold in this position whilst the securing setscrew is located and tightened. Do not overtighten. Prime the fuel system as detailed in page N. 11. N6 6. 2. Rotate the engine and note if there is a well defined spurt of fuel from the outlet port once every two eng ine revolutions. 7. NOTE: As an alternative the pump may be operated by means of the hand primer as shown in Fig. N.7, which should give the same result every time the priming lever is operated.
However should the engine happen to have stopped in such a position that the eccentric operating the lift pump is in the maximum lift position, then it will not be possible to operate the hand primer properly. If such a condition arises the remedy is to rotate the engine one complete revolution. 8. FUEL LIFT PUMP the in Position 1. Disconnect the outlet pipe (lift pump to filter) leaving a free outlet from the pump. N5 N7