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4440 front axle bushing

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Been working on my 4440 noticed the front axle bushing towards the front of the tractor looks like it worn up towards the top of the steering motor support. Is this an easy fix and how would I go about fixing it.
And what causes this type of problem it seems that they have been greasing it it took grease when I greased it. Have noticed a lot of these type of tractors have this issue I am kind of concerned about it have a feeling the bushing is worn threw.[/u]
 
Well the newest JD 4440 is now 35 years old. So just normal wear over time will wear the pivot bushings. Also if you are not taking the load off the front end by jacking it up or lifting the front end with a mounted loader you not getting grease into the place it needs to be to stop wear.

Not a hard fix technically. You have to remove the front axle center. So you have to be able to block/jack the tractor up safely and then remove the axle. If you caught it before it wore into the housing all you would need to do is replace the bushing and the pivot pin. If the housing is worn it depends on how deep it is worn for the type of repair. If it is just a shallow wear place I have had good luck with installing a new bushing with liquid metal filling the worn spot. If it is worn really deep. You will need to remove the saddle too and have a machine shop bore the hole out to round and then bush it back down so the wear bushing fits.
 
My 4450 MFWD was worn into the casting, so I hand formed a piece of steel to go above the new bushing, and it is held in place by the large washer.
 
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