diesel keeps running with key out.

I've owned MB diesels since the 70's and currently have two 123's which I do all repairs on. The 300 TD turbo has just developed a leaking diaphram on the shut off at the back of the injector pump. Checked it with a Vacuum pump. She'll run all day with the key out. Getting to it looks like I've got to remove the oil filter housing. My shop manuals have little data on this and my local mechanic says he's done it too seldom to advice me. Before I scrape my knuckles on that one I wondered if you would have any sources on details for undertaking this repair?

Thanks in advance for any input.

A fellow enthusiast,

Jeff Karg

[Maxwell]

If you do a search i think thre was a post with pictures of the procedure, as i recall the most important part is making sure the switch hooks on right to the part inside the IP.

OK, I got the part about reassembling the new unit correctly with it hooked up so the engine doesn't overrev . But will the part be accessable with the Oil filter housing in place? And am I stepping into a contortionist's funhouse trying to get the allen screws off of it?

Jeff

[engatwork]

You can swap it with the filter housing in place. After you remove the fasteners you will want to move the diaphragm "body" toward the block and then it should come out while moving it toward the rear of the block kinda between the block and filter housing.