Need More Threads On Leveling Screws

eastexan · Mar 31, 2011

I have a CIH 385 with the short tires on the back causing me to not have enough lift for certain implements.
So I'm wondering if a machine shop could make more threads on the shafts of the leveling screws on the 3-point hitch?

They look like 7/8ths bolt threads, but I don't know how hard they are. I figure they would probably be a grade 8 or better.
What do you guys think? Anyone ever threaded a hardened bolt?

Anonymous-0 · Mar 31, 2011

It would be a lot easier to adjust or modify the implement so the three point attaches differently. Many implements allow some adjustment by moving the pins to different holes in the frame.

eastexan · Mar 31, 2011

Thanks, but it wouldn't be easier in this case.
The screws are easy to get out. You just knock the pin out of the top yoke and unscrew them out and there is still plenty of room for more threads up the shaft.

I've already adjusted them as high as they will go, and the lower links are only about 2" above the ground (they were dragging the ground).

Before I got it, the tractor was used by the county to mow ROW's. So all its probably had on it was the brush hog.
It is enough for that, but doesn't lift high enough for ground engaging implements to clear.
It'll sink a subsoiler to China but won't quite lift it out of the ground.

bison · Mar 31, 2011

I would cut a piece out and weld them back together

Oldmax · Mar 31, 2011

Their not really that hard I cut 5" off a 8N for my NH 1715 and threaded it in my shop It workes fine is better than junk that come on it total cost was about $75. They are not grade "8".

tractorfixer1 · Mar 31, 2011

could be that you could remove the top arms from the
rockshaft and replace them in a higher spot. If the
lift has been rebuilt at some time in the past they
may be out of place.

Anonymous-0 · Mar 31, 2011

What arms are on your 3 pt. We have the category one/two on ours and have never had a problem. We use it installing lawns all summer long. We even have the 24" turf tires on it and drive it on and off trailers with the implements attached. One of the best tractors ever built! Our has been overhauled top to bottom once and has the step up reverser transmission.
P.S. a really good upgrade is a 685 clutch does fit in the bell housing.

Rusty wheel · Mar 31, 2011

I doubt they are a grade 8, maybe a grade 5. See if you can cut them with a file. If you can, they can be machined. They may be case hardened. If they are, a carbide threading tool will get below the case if you still want to machine them.

karl f · Mar 31, 2011

I vote for larger tire/wheel assemblies if you have
16 or 24 inch rims like a lot of the municipal
tractors seem to end up with.
I would want as much clearance under the drawbar
(lowest point) as reasonably possible when doing
tillage.

karl f

eastexan · Apr 1, 2011

Thanks, Oldmax.
I took them up to a machine shop and they threaded them no problem.
After what you said, I would have threaded them myself if I had the right die. I sure would have thought they would be a harder grade steel than that.

They only charged me $30 for threading them, so I feel I came out pretty good on that deal.

Thanks everyone for your input.

eastexan · Apr 1, 2011

(quoted from post at 14:20:33 03/31/11) I vote for larger tire/wheel assemblies if you have
16 or 24 inch rims like a lot of the municipal
tractors seem to end up with.
I would want as much clearance under the drawbar
(lowest point) as reasonably possible when doing
tillage.

karl f

Thanks Karl.
I still want to do that. It's just money is a problem right now.

Need More Threads On Leveling Screws

eastexan

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Anonymous-0

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eastexan

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bison

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Oldmax

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tractorfixer1

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Anonymous-0

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Rusty wheel

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karl f

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eastexan

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