This thread on another board, help me a out a lot... http://www.mercedesshop.com/shopforum/showthread.php3?t=101884 . Autozen's description on page 2, was especially helpful.
I didn't have to remove the alda when i replaced the shut off valave on my '81 300td.jrehm - 3/28/2005 7:29 AM
If you are inclined to remove the ALDA (which looks as if it is damn near necessary) to change the valve, make sure you have a couple of the plastic retaining clips on hand that hold the rod on the ALDA lever. They are easy to break (not the greatest design in my opinion), especially if they are old.
Did mine last night. It wasn't all that bad, but it does take a little patience to get the thing out and the new one in place. Took me about and hour.benmaples - 3/14/2005 5:40 PM
[?]I need to change the vacuum shut off valve that is mounted on back of injection pump between pump & oil filter housing. All Data shows to just remove the 4 retaining bolts & remove valve. it looks a little more involved than that. do I need to remove oil filter housing& how do you unhook the old valve & re-hook the new one? I would think that if you don't hook it up right the engine might race when I start it up.[xx(][xx(]NOT GOOD!
THANKS FOR ALL THE HELP