JD D front axle support pivot

Patsdeere · Apr 25, 2019

Ok, I'm at the end of my rope. The pivot pin has wallered out it's threads so badly that the oil runs out as fast as you pour it in.

I tried drilling it out to 7/8 and tapping for 1" threads, but the 7/8 bit (originally 7/8 thread) just went through. I ordered a 15/16 bit and tried it again today. Bit screwed itself in and stuck. Ended up bending the shank trying to get it out. It never came out. Have to go back at it with a 2' pipe wrench to see if I can get it out.

If I get it out without having to melt it out, what's my next option? Is the inside of the housing flat enough that I could clamp a rubber washer under a bolt head in the inside? If so, then I would have to mill down the pivot for the front axle by the thickness of a nut since it would have to grab the case super tight to prevent oil leakage. Would that cause strength issues?

Any other thoughts?

John Deere D · Apr 26, 2019

I'm trying to understand your post:

Please take a look at these pictures and let the "YT" group know the area of your concern:

Bob....

Patsdeere · Apr 26, 2019

Item #1 in the top picture is ok, but the part it threads into (oil sump of main case) is wallowed out.

If I replace #1 with a bolt and rubber washer (on the inside) then I'll have to mill down #4 so that there is room for a jamb nut, but I'm worried it will severely weaken that part.

Mike M · Apr 26, 2019

If you can get the case threaded again you can make a custom stud in a lathe so it fits tight and JB weld it in place.
I did this with my unstyled B drawbar support frame studs.

golfcartman · Apr 26, 2019

If you don't have the oil screen out, I would go ahead and pull it out and then you can see the inside where your drill bit is. It should be flat enough to for a rubber washer but if you have any movement in that bolt it will probable ruin that washer pretty quick. If that bit is in very far it may be into your oil screen. I don't remember how much room there is in there. Best to retread it if possible. Good luck!!

Patsdeere · Apr 26, 2019

Ug, hope I'm not into the screen.

My first thought was to rethread, but I need the hole to be the correct size for a tap. The threads are so gone I can't go back with 7/8, or even 1" threads.

Bob · Apr 26, 2019

(quoted from post at 16:14:36 04/25/19) Ok, I'm at the end of my rope. The pivot pin has wallered out it's threads so badly that the oil runs out as fast as you pour it in.

I tried drilling it out to 7/8 and tapping for 1" threads, but the 7/8 bit (originally 7/8 thread) just went through. I ordered a 15/16 bit and tried it again today. Bit screwed itself in and stuck. Ended up bending the shank trying to get it out. It never came out. Have to go back at it with a 2' pipe wrench to see if I can get it out.

If I get it out without having to melt it out, what's my next option? Is the inside of the housing flat enough that I could clamp a rubber washer under a bolt head in the inside? If so, then I would have to mill down the pivot for the front axle by the thickness of a nut since it would have to grab the case super tight to prevent oil leakage. Would that cause strength issues?

Any other thoughts?

Bob · Apr 26, 2019

<img src = "https://i.imgur.com/bEosmB0.jpg">
.

Patsdeere · Apr 26, 2019

That's similar to what I'm trying to do.
Just instead of the insert, I made a new
threaded stud with bigger threads on one
end. Problem is I can't drill it to the
right size where it is.

JD D front axle support pivot

Patsdeere

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John Deere D

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Patsdeere

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Mike M

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golfcartman

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Patsdeere

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Bob

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Bob

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Patsdeere

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