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John Deere Tractors Discussion Board

Re: 2630 flywheel timing bolt hole, with broken pin?


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Posted by chickenfriend on January 16, 2013 at 06:23:16 from (76.4.85.97):

In Reply to: 2630 flywheel timing bolt hole, with broken pin? posted by chickenfriend on January 15, 2013 at 12:39:36:

Yesterday, I did get a reply back from John Deere (which I should have been more patient for).

Here is the information they sent me. Perhaps there are one or two people out there that this may help:

"This tractor shows 3 flywheels, but the timing pin hole dimensions are the same on all of them as below:



.368 Drill .120 [3,05] Deep

.550 [13,97] x 120 degree csk"


The .368 drill is between 23/64" and 3/8". Originally, I thought is was a 3/8" drill, but that is a little too big. Why I assumed that was because a 3/8" bolt is the largest size that will fit through the pin hole in the flywheel housing.

I don't have the original bolt-pin that secured the timing plate to check the diameter (because it was sheared-off).

I assume the .120 is the depth, which is not very deep, only 3mm, about what my hole was originally, I think. So maybe it was ok, afterall.



The chamfer on the hole is by a .55" drill with a 120" countersink.

Typical lesson learned here is not to assume anything (I seem to re-learn this regularly).

This post was edited by chickenfriend at 07:40:51 01/16/13 5 times.



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