AIR CLEANERS AND FUEL SYSTEM-N.S the valve in the outlet port fitted in the reverse position. 3. Press the valves home with a suitable piece of tubing. approximately 9/16 in (14,29 mm) inside diameter and {f in (19,05 mm) outside diameter. 4. Stake the casting in six places (between the original stakings) round each valve, with a suitable punch. NOTE: Valves fitted to earlier lift pumps were held in position with a retaining plate and two screws. On no account should attempts be made to stake the valves of this earlier type pump. 5. Place the rocker arm retaining pin in the appro- priate hole in the lower casting and push through until it protrudes slightly inside. 6.
Fit one packing washer and the link into the casting moving the pin in slightly to retain them. 7. Fit the rocker arm and return spring and retain by moving the pin in further, ensuring that the spring seats correctly. N9 8. Fit the remaining packing washer, then push the rocker arm retaining pin through the link, washer and casting until the ends protrude equally beyond the outside of the casting. 9. Retain by securing with the two clips. 10. Insert the new rubber sealing washer followed by the steel seating washer and diaphragm return spring. 11. Place the diaphragm assembly over the spring with the pull rod downwards, locating the top of the spring in the diaphragm protector washer. 12.
Now position the pull rod so that the flat notched blade has one of its thin edges facing the rocker arm. Press downwards on the diaphragm assembly and twist it through 90" in either direction, this action will engage and retain the pull rod in the fork of the link. FUEL INJECTION PUMP Description The fuel injection pump is of the D.P.A. distributor type. It is a precision built unit incorporating a simple hydraulic governor or alternatively one of the mech- anical flyweight type depending upon the application to which the engine is fitted. 13. Operate the rocker arm against the diaphragm spring pressure until the diaphragm is level with the body flange. 14.
Place the cover assembly in position and line up the file marks made on the flanges prior to dismantling. 15. Still holding the diaphragm level with the body flanges, fit the five flange securing screws, tighten evenly and securely. To Remove the Fuel Injection Pump 1. Remove the four high pressure pipes between the pump and the atomisers and blank off all ports to prevent the ingress of foreign particles. 2. Remove the low pressure fuel pipes from the inlet and outlet connections and blank off all ports. To Refit the Fuel lift Pump 3. Disconnect the stop and throttle controls and their return springs. 1. Fit the distance piece using a joint on either side. 2.
Enter the pump operating lever into the recess in the tappet inspection cover as shown on Fig. N.9 and secure with the two nuts and washers. 4. Remove the two nuts and the socket headed set- screw which secure the fuel pump to the mount- ing flange together with their spring and plain washers. 3. Reconnect the low pressure fuel pipes to the inlet and outlet ports. 5. Carefully withdraw the fuel pump from its mount- ing.