FUEL SYSTEM - N3 Fig. N.4. Fuel lift pump cover removal 2. Clean   the   sediment   chamber   and   check   the pulsator    diaphragm    for    condition.        Renew    if necessary. 3. Refit the pulsator diaphragm and cover.  Tighten the   securing   screw   just   sufficiently   to   make  a tight sealing joint. 4. Vent the fuel system as detailed on Page N.14. To Remove the Pump 1. Disconnect  the  pipes  from  the  inlet  and  outlet ports.  Seal the ends of the pipes to prevent the entry of dirt, etc. 2. Remove the two setscrews securing the pump to the  cylinder  block  and  withdraw  the  pump  and joint. To Dismantle the Pump 1. Before   dismantling,   clean   the   exterior   of   the pump   and   make   a   file   mark   across   the   two flanges   for   guidance   in   re-assembling   in   the correct positions. 2. Remove   the   six   securing   screws   and   spring washers   and   separate   the   two   halves   of   the pump. 3. Remove  the  diaphragm  from  the  lower  half  of the  body  by  unhooking  it  from  the  rocker  arm link.        The    diaphragm    spring    can    now    be withdrawn from the body. 4. Drive out the rocker arm pivot pin from the body and  withdraw  the  rocker  arm,  rocker  arm  spring and link from the body. 5. Dismantle  the  priming  lever  from  the  body  by removing the lever retaining pin and withdrawing the lever and spring from the body. Fig. N.5. Exploded view of Fuel Lift Pump. 1. Pulsator Cover Screw. 8. Valve Gasket 15. Link. 2. Pulsator Cover Washer. 9. Valve Assembly. 16. Rocker Arm Pin. 3. Pulsator Cover. 10. Diaphragm Assembly. 17. Primer Pin. 4. Pulsator Diaphragm. 11. Diaphragm Spring. 18. Primer. 5. Cover Screw. 12. Body. 19. Sealing Ring. 6. Cover Screw Washer. 13. Rocker Arm Spring. 20. Primer Spring. 7. Cover. 14. Rocker Arm.