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Old 11-12-2012, 03:20 PM
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Default Easiest safest way to remove pin bushings ?

I do bushings in transmissions and transfer-cases regularly without any problem, and have the tools to do it correctly.

My question is, how do I get these out ? They are a hard press fit, they do have a slit in them, but they are driven in. A brass drift will not do it, they are a hard material for bushings, and fight pretty hard coming out. 2nd pic is two I removed sitting next to a new one.

There is a 1/8 shoulder machined between the two bushings ( grease zerk pushes grease into that 1/8" shoulder as well), so they both have to be removed from the same way they where installed, which is from each end, and the one end is in a hole, of sorts. In other words, they can NOT both be pulled through one side, and you can not get behind either of them for some grip.

You can see that I got one set changed out, but it was a PIA. I used the torch and a chisel and allot of finesse. Figured there has got to be a better way.

The third pic, is my tilt cylinder, they need to be changed as well, and should be easier.

I used a transmission bushing driver to install the bushings, but my strongest bushing remover with a slide hammer was not up to the task of getting them out, let alone even causing them to budge (4th pic).

I do have some threaded bushing removers for certain transmissions, does anyone make those in standard sizes ? Its like a massive tap, and its tapped on the back side for a slide hammer. In this case, I would need a 1.5" bushing remover.
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Old 11-12-2012, 03:33 PM
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If you got the money, here is how you do it.
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Old 11-12-2012, 04:15 PM
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Steel bushings will fall out if you run a bead of weld around the inside, don't have to be pretty! The bushing will shrink and slide out.
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Old 11-12-2012, 04:17 PM
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You could use a sharp cape or round nose chisel to split the bushings. Standard cold chisels aren't a good shape for such work.

http://wildetool.com/catid-18.cfm

I tack weld sections of rebar or round stock to my chisels at random angles as handles so I can pound them with a hand sledge while keeping my fingers out of the way. You get better control too, and can often reach deeper than when holding chisels conventionally.
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Old 11-12-2012, 07:02 PM
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I use an air hammer and a bushing splitter. Once you cut all the way through you can remove the bushing with pliers.

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Old 11-12-2012, 07:19 PM
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Quote:
Originally Posted by digr View Post
Steel bushings will fall out if you run a bead of weld around the inside, don't have to be pretty! The bushing will shrink and slide out.
I do that quiet often . Allways worked
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Old 11-12-2012, 08:43 PM
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If you can get it in a press you can get a washer with the same outside diameter as your bushings grind a flat spot on each side and slide it through and turn it sideways into your slot. I don't know if you have enough room to do that or not. I have done this many times for bearings and bushings. It is a lot stronger than you think it would be.
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Old 11-13-2012, 02:40 AM
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I seem to remember a 3 piece outfit for those bushings. Two halves of a flanged bushing and a stepped shaft for a push rod. It relied on the lip against the land inside the bore for grip.

From the look of the old bushes, I think caving them in with a chisel and pulling them with a vise grip on a slide hammer is your best bet. Even welding a bead around the inside might burn through and damage the bore the bushes set in.
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Old 11-13-2012, 08:00 AM
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I'm a bit cornfused, you used a torch, but didn't blow them out ?

I can't see saving them.

Maybe a fire hazard nearby ?

I'm not the greatest with a torch, but keeping the fire off the part,
and the oxygen on the part (after you get a spot started) will
enable you to cut a nice line right thru the bushing, without
nicking the parent bore.

IIRC they are called spring bushing's, there used to be a shop down in Erie,
that made them.
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Old 11-13-2012, 08:41 AM
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Quote:
Originally Posted by digr View Post
Steel bushings will fall out if you run a bead of weld around the inside, don't have to be pretty! The bushing will shrink and slide out.
Bearings and races also!
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