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426 injection pump
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TrentH View Drop Down
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Joined: 05 Mar 2025
Location: Minnesota
Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TrentH Quote  Post ReplyReply Direct Link To This Post Topic: 426 injection pump
    Posted: 1 hour 41 minutes ago at 3:48pm
I have a combine motor in my 8050 that I used the stanadyne pump when I put it in. It started leaking fuel on the backside of the pump out of a large plug by the bottom towards the rear . Does anyone know what size wrench for the plug? I’m trying to avoid pulling it off to tighten it.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22755 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 36 minutes ago at 3:53pm
1 1/8" I think.
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tbran View Drop Down
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Joined: 14 Sep 2009
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Points: 3630 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Posted: 45 minutes ago at 4:44pm
We made a special wrench - bent with correct angle and the surface has to be ground FLAT - the nut is so thin the taper on a std wrench will not turn the nut but just jump off. For some reason the bottom plug and back nut that retains the advance spring will 'let go' on rare occasions. Many times the threads pull - maybe you will be lucky.  
When told "it's not the money,it's the principle", remember, it's always the money..
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