8070 injection pump fitting

Hello, I purchased a 8070 off the internet  It's an '84 model and somebody along the way removed the entire manual primer off the injector pump and filled the hole with silicone.  This is a 45 degree fitting that threads into the pump on one end and the manual primer pump assembly threads on the other.  The parts book and the dealer both say this fitting is unavailable (part number 740630058, #5 on 8070 parts book page 74, 75).  Does anybody know where I might find one?  I've talked to a couple of pump rebuilders but they don't want to separate one from a pump which I understand.  I've been told that some Gleaner models used the same engine.  Would anyone know of a parts machine sitting around?  Thanks for the help.

I hoped I wouldn't need to go back out tonight, then my wife asked, "Did you get the mail today?" So I checked and our pump doesn't have the 45 elbow. I checked the 82 8050 and it does have it, while the 85  8070's don't. I don't see that you need the elbow. It looks like it only made it easier to work it.

With that elbow it seems like things vibrated loose over time, so they eliminated it. Without it, the primer wasn't as handy to use. I don't remember if the primer elbow elimination was done at the same time they re-routed the injector lines.

Oh, I have issues alright.


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This is the previous owners fix. A piece of plastic clamped over the hole.

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Under the plastic is a combination of aluminum foil and RTV silicone.

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And as I suspected, under the silicone, not a single thread.

Does anybody have the rear case for this pump or should I just start over with a rebuilt?

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Thanks for your help.

When I rebuild those pumps, those really fine threads sometimes gall upon disassembly. I send the rear piece off and they put a new thread insert in. But, I only do that on a rebuild, I cannot sell pump parts separately. I'd imagine someone will have a good used one to sell you. 

Edited by injpumpEd - 20 Feb 2022 at 2:54pm

It would work. 

2 check valves down inside. Definitely not the preferred method. Hard to keep the chips from getting in.

Check your local diesel shops for the correct part(s).

have you tried ebay or craigslist?

Sorry to take so long to reply. I’m a one man show and you know the saying about a one legged man in an a$$ kicking contest

The pump on my 8070 is an Ambec 100. If you have parts, I’d be more than happy to pay you for them since other posters aren’t impressed with my fix

Sorry I was talking about the 8070 not starting after it sits

A lot of the IH engines use an injection pump that is very similar to that Allis pump. I can't recall exactly how their primer system works. It may be the same.

Since someone had already installed a pump between the tank and the injector pump, it seems the easiest fix for this problem turns out to be Aluma Bond.  Think JB Weld for aluminum.  I don't like JB Weld on aluminum because it expands/contracts at a different rate on aluminum than it does on steel and everything still leaks.  Thanks for everyone's input.