27. Fit new sealing rings. Note! The sealing rings must face
the right way, see that they do not block the drain hole in the
pump housing. Smear grease on the shaft and fit it carefully
in the housing. Screw it through the sealing rings so that
they will not be damaged. Place the shaft so far into the
housing that the hole for the screw is visible. Fit the impeller
and screw in the screw. Then carefully press in the impeller
so that it touches bottom. Place a new gasket on the cover
and tighten the cover with the six screws.
25. Unscrew the screw and withdraw the impeller from the
shaft. If the sealing rings are to be replaced, the shaft and
the impeller can be removed and the screw subsequently
loosened.
26. Remove the sealing rings 1 and the 0-ring 2 (earlier
engines) and clean the housing and the shaft. (Note! The
pump must be removed from the engine.) Check that there
are no abrasions on the shaft. Note! A new 0-ring is not to be
fitted.
Overhauling the feed pump
28. Depress the pump’s lever (see fig.). If the pump “creaks”
then it is sound. If it is unserviceable the diaphragm must be
replaced which is done in the following manner:
9
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