Found this info on yahoo groups mercedes diesel.
Here is the original
Link and the
translated one from German to English
Quote:
Hello,
Just like to pass that on for thos who haven't done this before.
Someone from the German FMSO set up a little foto documentation about
how to change the main rotary shaft seal of VE pumps.
This can be necessary after longtime use of biodiesel, due to simple
wear or if the main shaft clearance has become too big- if it's out of
centre. However in the latter case the problem can't be solved with just
changing the ring...
http://www.uwereimann.de/poel/wdr.htm
The method with using screws is his first trial and he came to the more
efficient solution after that...
Maybe this can be of some help for beginners.
Stephan
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