4640 front axle worn out badly

UsernameChanged · Jul 8, 2018

Front axle bushing is worn out to the point where the washer is running up along the steering motor support. Washer is being grooved by that I mean wearing in two. How far is too worn out to be salvageable in repairs

Bob · Jul 8, 2018

As a replay to your other thread said, likely, (if you can find a machine shop nearby equipped to do it) it can be precision bored out and a steel bushing made and pressed in to take it back to original size.

Some years ago there were adds in some trade magazines of outfits selling or renting portable jigs to bore out certain axle pivots. Don't know what's still around, or if any were made for your particular application.

On the other hand, why not check around to see what the part is going for at wrecking yards to have a $$$ number to work against.

fixerupper · Jul 8, 2018

Clean it up really well using carb cleaner or any other solvent that dries clean and dry. Put plenty of JB weld in he upper worn portion of he hole along with putting a little JB on the outside of the new factory bushing. Shove the bushing in there making sure the bushing is firmly and squarely seated in the bottom of the hole. Wipe away any excess JB. Walk away until tomorrow morning and put the axle back together. I have done it twice on red tractors, one of them being my 1086 and have seen this done on two Deere’s one being a 4630. They all lasted very well.

UsernameChanged · Jul 8, 2018

I’m just worried that if they re bore the hole to big that it will weaken the structure on the steering motor. That is all I’m worried about the washer is being rubbed off at the top of the steering motor cast hole.i can understand it being worn but this one is kind of scarring me

rlp in Co. · Jul 8, 2018

The method I used. Buy a brass round. Bore
it out. Turn the outside down to a little
larger than the worn hole. Paint it with
black paint. Drive it in the hole. Pull it
out and grind or sand where it is tight.
Repeat. Makes a tight permanent repair.

Another method, not as good but it works.
Buy a new bushing. Put it in and pack
modeling clay around it and leave a spruce
pouring spout. Pour it full of lead. I have
used both methods with success.

rlp in Co. · Jul 8, 2018

Spell checker!!! I think it's called a sprue. It's just a funnel to pour the lead in.

430WLPG · Jul 8, 2018

My son fixes those by installing the new bushing and
measuring the worn area and machining a piece of shaft that
shape and fitting in the worn area a tig welding it in place,
actually the worse it's worn the easier the make the repair part

tim s · Jul 8, 2018

It may not be as bad as you think,, the pin takes a lot of the wear,,I have a guy that come to the shop and bores them out, then I make a bushing to press into the housing that will receive the standard pin bushing,,making sure the grease port is added..I change a lot of them here..

matthies · Jul 8, 2018

We took our 4020 front end to a machine shop for a bushing to fix a slopped out hole. Came back with JB Weld or similar product. 20 years and it is still tight, feed cattle with it every day and move lots of dirt with it. 148 loader 7 foot bucket with extension.

4640 front axle worn out badly

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Bob

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rlp in Co.

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