loose bushings JD 110

othello · Aug 5, 2014

I need to overhaul my JD 110.
Especially the bushing in the dipper is loose.
I can get a new pin, but the factory pin will be too small for the enlargened hole.

I was wondering if anybody has ever reamed out the hole in the dipper, to a uniform size, and then made an oversize pin.
I can machine the oversize pin, but I just don't know if and how they are heat treated.

Does anybody have experience wit that?

Firemanmike69 · Aug 5, 2014

We line bore holes for bushings all the time at the shop. Pretty standard procedure in the heavy equipment world. Remove bushing, weld hole, cut hole to press fit bushing, press fit bushing and back in the dirt

othello · Aug 5, 2014

Well, the problem I run into is lack of information. The JD dealer has no idea about dimensions, he has no replacement bushings, all he has is an original JD spare part.
When I told him about the worn hole in the dipper he said he could get me a new dipper boom for $3,500.

I can make my own bushings, I might even get it in there straight, I just need a bit of information.
Are these parts hardened?

The pin I just bought seems to have been hardened only mildly.

RayF · Aug 6, 2014

You can make your own bushings. You can line bore the holes bigger so they clean up. Machine new bushings out of 4140. Leave them around 10 thou oversize. Heat them up red and quench them in oil. Final size them to be a 3 thou interference fit in the bore. Have 8 to 10 thou pin clearance.
Depending on your machining capacity its easy enough to buy new JD bearings and repair the bores to the right size.

Firemanmike69 · Aug 6, 2014

How loose is loose ? If you want an easy fix just tack weld the new bushings in

lantraxco · Aug 6, 2014

Are you referring to the end of the dipper where the bucket pins on? Bushing shows in the Deere parts list as:

AT122209 Bushing 65 X 80 X 50 mm (2.559 " X 3.150" X 1-31/32") with a spacer tube in the middle?

Shouldn't be hard to come up with some off the shelf replacements if that helps. Try Ball bushing warehouse, they have metric and inch size hard bushings.

othello · Aug 6, 2014

Well thank you guys, after the total news blockage by the dealer this is refreshing, I learn about some details.

First of all, when I mean a sloppy fit, I mean the pin is smaller than the bore by 0.030 to 0.050". On a 6" to 9" long pin of about 1.3" diameter.

I don't have the capability to weld on material and then line bore.
I could possibly line bore without the welding, but then the hole gets too big for a standard JD pin.
Therefore my question if one can machine their own oversize pins.

I did not find the part lantraxco was referring to. It would be great to find a replacement bushing for the standard JD pin, and just have to weld it in, but I don't know where you found the info.

Delmer · Aug 6, 2014

It sounds like the bushing is worn, but the bushing isn't loose in the bore of the stick, is that right? This baby must have bushings in a joint like this? Firemanmike, and the rest of us assumed the bushing was loose in the bore and you needed to line bore to repair the bore. The bushing and pin from the dealer will be much cheaper than line boring. Pardon me if I missed the boat on this one.

Jdparts.com is relatively easy to view, you have to sign up to get prices, or just write down the numbers and call your dealer.

lantraxco · Aug 7, 2014

Picture is worth a thousand words?

Deeretracks · Aug 7, 2014

I think he's working on a little 110 backhoe, isn't that a breakdown for a 110 excavator? Those 110 backhoes are pretty much built for homeowners and small landscapers. Any serious use and they fall apart. I was ashamed Deere painted them yellow. Should be green and sold at home depot. I don't remember there being bushings available for those (stupid design). We installed a few of these as quick fixes when customers didn't want to bore it oversize and add real bushings (what I would do). http://www.expandersystem.com/

lantraxco · Aug 7, 2014

Ah, my bad. In that case set up the mag drill power through the whole works and drive in a piece of 1040, weld it in. Probably be better than what it came with.

Sorry for the confusion...

ointhead

Delmer · Aug 7, 2014

No bushings, huh? then yes, you can ream the stick and bucket and put in whatever pin you feel like, it will be as good as original. Rebar isn't recommended, but not unheard of on here.

But that doesn't seem like very much play to be honest.

othello · Aug 7, 2014

*Deeretracks totally crushed my spirit.
To speak so lowly of my machine...

But I agree that is is disappointing to realize that they simply welded a tube or sleeve into the dipper, and probably not only there, without any provision as to how to service or repair this when the joint gets loose.
Not the finest engineering.

Which is the reason why I get excited when I read the responses of some of the people here, because I realize I could actually improve on the longevity and reliability of the machine each time I deal with one of these joints, which will get looser and looser with time.

So here I refer to what Deeretracks and especially lantraxco said, I can knock out the worn sleeve and replace it with something better.
And I hope that you guys can direct me to a drawing or information, how exactly a better solution would look like.
I don't have this experience (yet!) since this is my first machine.

And thank you all

lantraxco · Aug 7, 2014

More like this one?

lantraxco · Aug 7, 2014

I wouldn't bother with anything under an 1/8" slop on either end, I worked for outfits with Deere 410B's and CAT 416's wouldn't let you touch 'em if the bucket didn't ring like a cowbell on the end of the dipper.

Delmer · Aug 7, 2014

othello said:
So here I refer to what Deeretracks and especially lantraxco said, I can knock out the worn sleeve and replace it with something better.
And I hope that you guys can direct me to a drawing or information, how exactly a better solution would look like.
I don't have this experience (yet!) since this is my first machine.

And thank you all

http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt

From the looks of it the boom to dipperstick pivot has bushings, but no bushings in the bucket end. To me that's not enough play in the bucket to even think about messing around with, but you could bore it out and put in bushings like the drawing in #9 or cut out the old bore and weld a new one in (and either bore it after welding or just make it loose enough that the pin will still fit after welding, which may be what Deere did originally).

othello · Aug 9, 2014

Delmer, I think this is how I have to do it.
I wouldn't know how to weld up these small bores (just a little over an inch), so when the time comes cutting out the old bore and welding in a new one is probably the nest approach.
I could then purchase the pin from JD, but I would have to heat threat the bushing.
Have people here done this?

cqlineboring · Aug 25, 2014

I've just read through this post and it seems you are looking for an alternative to save a bit of money ---- equals more money later on, weld in some harden bushes yeah so your bore is just gunna get bigger and bigger, hole gets bigger equals less material in the machine that will end up wearing quicker and will be prolonged to cracks then you will have to get it all cut out and welded up which will mean line boring anyway, if you plan on selling the machine soon and your buyer is blind take the short cut, otherwise get a quote from a line borer near by you and fix it, small job like that shouldn't be that much anyway probably done in half a day and fitted all back up.

loose bushings JD 110

othello

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Firemanmike69

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othello

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RayF

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othello

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Delmer

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