JD 440 dozer final drive problem

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dave55
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JD 440 dozer final drive problem

Post by dave55 » Sat Sep 21, 2024 12:25 pm

I have a 440 dozer and the quill on the left side that holds the shaft that drives the track sprocket is getting horizontal force pushing the quill out. When I got the dozer one of the three tabs on the quill was broken, at that time I didn't realize why. I had that fixed and the same thing is happening again.
There shouldn't be much outward force on this, right? I'm thinking an interior bearing in the rear end may be going bad.
Any thoughts?

dtoots1
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Re: JD 440 dozer final drive problem

Post by dtoots1 » Sun Sep 22, 2024 8:34 am

Dave55,

Not sure just exactly what is happening here....please explain what motions you are going thru...Are you moving the steering lever and engaging the brakes/clutches and the quill making a popping kinda noice??? If so that usually is an adjustment problem in that the quill is moving too far. The balls behind are literally moving out of the groove.

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Lavoy
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Re: JD 440 dozer final drive problem

Post by Lavoy » Mon Sep 23, 2024 8:01 am

There is no 3 bolt quill on the axle shaft, only the pinion shaft. Either way, you need to quit using the crawler and pull the final drive to find out what is wrong.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
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dave55
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Location: Southeast Iowa

Re: JD 440 dozer final drive problem

Post by dave55 » Thu Sep 26, 2024 9:06 am

Lavoy wrote:
Mon Sep 23, 2024 8:01 am
There is no 3 bolt quill on the axle shaft, only the pinion shaft. Either way, you need to quit using the crawler and pull the final drive to find out what is wrong.
Lavoy
Thanks Lavoy, that's what we are going to do.

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