Help 1982 300d injection pump and Alda connection
 

Hi can anyone give me a picture or description of the 300d 617 injection pump. Is this the Bosch series (M)? Question does the the collar which holds the nut for the ALDA have an o- ring for sealing oil? And what size is the hex wrench for tightening the collar for the 27 mm nut which holds the ALDA? It must have a hole for the plunger shaft. Finally, is there a nut inside the injection pump which holds the threaded collar which attaches to the ALDA? Or does it just thread on to the top plate of the IP?
Thank you

unless you have a euro engine, it is an "MW" pump

no oring there.

big hole in the center, once opened you have to disconnect the pushrod, kinda tricky

can't help w the rest, I used adjustable wrenches there.

The pics may help.

I don't know the sizes.

Thank you
Yes picture three in the previous post is what I am talking about. The plunger and nut retainer. The retainer for the big 27 mm nut was loose and leaking oil so I unscrewed it to look and found a groove in which looks to accept an o- ring. Also I wasn't sure if a nut had fallen into the pump which held that part from underneath the top plate of the pump. In any case if I could find an assembly diagram I can answer both of my question by looking at it. I seem to remember there was on around here a few years back.

I have this, the numbers, etc are described on the same page but I don't think you'll need that info for your question.

Thank you
 

Yes there seems to be no o-ring as the previous poster said. Ok.