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Tool Talk Discussion Forum

Bushing Removal

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Richard Fazio

06-02-2007 03:38:21




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I made new bronze bushings for the front bucket on a JD backhoe. The old ones are still in and are real thin. I've read on this board that a bead of weld works nice to remove a sleeve or bushing. These I think are bronze. I can't weld on that. I was thinking to just heat them up cherry red with the torch and try prying them loose. Anyone have a good idea for me. Thanks in advance.




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caterpillar guy

06-03-2007 20:02:52




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
Depending on what the old bushings are made out of you might be able to place the new one right on top of the old one and either press out the old one with the new one or with a puller made from a bolt and either washers or a plate on each side worked fine for me on S-cam bushings on brakes.



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Stan in Oly, WA

06-02-2007 19:51:49




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
Hi Richard,

What was involved in making the new bushings? Not being a machinist myself, whenever I make something like that it's rough and ready, at best. Usually gets the job done, except when it doesn't.

All the best, Stan



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Richard Fazio

06-04-2007 06:11:07




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 Re: Bushing Removal in reply to Stan in Oly, WA, 06-02-2007 19:51:49  
I just bought a piece of bronze tube stock made just for the purpose. I got it from enco I think. It was about 1.4" internal and 2.1" outside diameter. I turned it down to size on a small lathe. I needed 1.5" internal by 1.75" outside. The old bushings were so thin that I thought there were none in there. They are paper thin. Pushing them out with the new bushings won't work. I will cut them out with a chisel.

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Richard Fazio

06-02-2007 17:10:10




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
Thanks for all the responces guys. The bushings are real thin. I originally though there were no bushings at all. I like the cape chisel idea. I may be wrong they could be some kind of steel. I couldn't get new ones so I made my own out of bronze. For the amount of use I give the machine I hope they will last me for the rest of my life. Thanks again.



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Mike M

06-02-2007 15:38:29




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
Bronze bushings on a loader bucket ??? The ones I have had were some kinda hard steel/iron ? Otherwise they are too soft and would soon pound out from use.

If it is bronze or brass a tool even better than a cape chisel is a small round end punch with a U shape ground into the end. These really cut them out nice with little damage to the housings.



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jokers

06-03-2007 06:43:20




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 Re: Bushing Removal in reply to Mike M, 06-02-2007 15:38:29  
I`ve seen spring steel bushings used on pins on various machines as the spring steel is comparatively tough and hard wearing compared to the pins(sacrificial) or the corresponding surfaces within the equipment structure which are typically much more work and expense to rebuild.

I guess that bronze should work to some extent but it will wear fast, especially after it gets that first stress fracture from a shock load. Spring steel bushings are usually available OEM but Baum Hydraulics used to have it, I assume that they still do.

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flying belgian

06-02-2007 15:06:27




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
You can also take a hacksaw blade out of the handle and lace it through the bushing and put handle back on then saw the bushing in two.



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Steve Crum

06-02-2007 12:33:11




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
I agree, a cape or splitting chisel is slick. Often times though, if I am forced to make or externally size a bushing, I'll take a 3/8 or 1/2" thick slug and turn it to the external diameter minu a few thousands of and inch, and bore it for a draw rod. Then if the bushing doesn't start moving when tapped a few times, I put the slug, draw rod and pulling cap in place and start twisting. I've done the same with cylinder sleeves only I use a hydraulic porta power to draw them.

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oldrustycars

06-02-2007 11:45:07




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
third party image

heres the business end of a cape chisel. You dont use them often, but when you need it nothing else will do.



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CENTAUR

06-02-2007 16:35:36




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 Re: Bushing Removal in reply to oldrustycars, 06-02-2007 11:45:07  
That is a flat nose cape chisel which I have also used when approbriate.I meant a round nose cape chisel in my post. CENTAUR



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oldrustycars

06-02-2007 11:40:24




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
You guys bring a tear to my eye...this forum may be the last place on earth where someone knows what a cape chisel is. I'll agree its the correct tool. Not sure I'd try the heat and beat method, heat will expand the bushing, you want contract. On really stubborn bushings I've ground a groove all the way through with a die grinder with an extended shank burr, ball nose. That'll also let the bushing fold in on itself. Consider buying a proper bushing driver set to replace the bushings. The drivers are aluminum and will knock in bushings and races so nice you'll wonder how you did without one before. Also drives those pesky grease seals in right the first time.

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dan hill

06-06-2007 02:38:10




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 Re: Bushing Removal in reply to oldrustycars, 06-02-2007 11:40:24  
I have had 2 bushing cutters in my tool box for 50 years. One has a straight blade, the other is offset.Just a flat blade with a concave grind.



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Jerry L/AZ

06-02-2007 06:33:22




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 Re: Bushing Removal in reply to Richard Fazio, 06-02-2007 03:38:21  
Just done the same on mine. If they are thin you can use a cape nose chisel and grove it till it breaks , then just curl the bushing in on its self and knock it out Jer



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CENTAUR

06-02-2007 08:43:54




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 Re: Bushing Removal in reply to Jerry L/AZ, 06-02-2007 06:33:22  
If you do not have a cape chisel you can make one by grinding the end of a starter punch at a angle and you can narrow the sides if it sticks up while curling the cut strip out.Cape style chisels are ideal for this purpose. CENTAUR



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