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Holly Hill, SC | I repaired my JD 4840 axle 2 years ago by cleaning, welding with mig welder, grinding with die grinder (3/4 burr bit) and finishing with a cylindrical sander on a drill. I usually find an old bushing, pipe, or socket slightly smaller than the hole I am trying to create. Drive it in, after welding and grinding, and locate the scratches indicating high points. Grind some more. Once you are happy with it use some JB weld to fill in the small imperfections and sand the next morning. Drive in your new OEM bushing. If your new bushing drives in too tight, you may have to sand the inside of your bushing for the pin to easily fit. You can find most of the pins and bushing from an aftermarket source like Worthington.
Removing and installing the pins was not too hard on mine. Just a sledge hammer, no press. I think I replaced both but maybe just one of them. You can weld and grind those back down if you want.
I like the idea of fitting and welding some key stock above the bushing to act as a guage for welding and grinding. | |
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4440 Front axle bushing
