How do I get old wheel bearings out???

[cnrcpla]

I got my rear wheel bearings in today, and I can't get the old ones out... I have tried banging on each side of the old bearings, but thats only crushing the rubber seal. I can't get them out by pulling, so what do I do now?

[cnrcpla]

I don't even think they sent me the right bearings     I know you have to hit them in with a little force, but after I got one bearing out, I tried to see if they would fit and it really seems like the new bearing is to big... like it doesn't seem to fit into the bearing hole at all

[dogger315]

I can't get them out by pulling, so what do I do now?

To remove the old bearings, use a punch or extension with a flat tip
and go in from the inside of the hub.  There is a spacer inside the hub,
but it will move around enough so you can get a little "purchase" on
the bearing you want to remove.  Line up the punch and whack away
with a hammer, moving the punch around the bearing to keep it going
straight.  Omce you get the first one out, you can remove the spacer
and have full access to the bearing on the opposite side.  Repeat the
procedure for that one.  Put your new bearings in the freezer.  Once
they are good and cold (an hour), take one out and place it over the
hole and use a bearing driver and hammer to press it in.  You will know
when it's fully seated because the sound will change.  If you don't have
a bearing driver, use a socket that is the same size as the bearing.
Repeat the process for the second bearing, install the seals and you're
done.

it really seems like the new bearing is to big.

Bearings use an interference fit so they may appear to be too big.

dogger

[ford832]

I just hook them out with my finger. ;)Nah,what dogger said.Set the old bearing on top of the new bearing if you don't have a set of calipers to ck for size.
Also,remember when you drive the new bearing in,only hit or press on the outer ring of the new bearing.If you hit the smaller inside ring you will ruin the bearing.

[cnrcpla]

I haven't gotten as far as putting the new ones in yet... I got the bearing on the sprocket side out, but I'm hitting the one opposite side so hard I am affriad I am going to break something... I put some penetrating oil in it to see if it will work. I am going to put the new ones in the freezer, but I am sure they aren't the right ones because it is about 1-2mm over sized...

[rbigair40]

what bike is it some have a clip on the brake side

[cnrcpla]

its a yz250, i don't see any clips or anything to keep it form coming out... But I am done messing with it for the night before I get mad and break something, so tomorrow is another day.

[MetalMike1982]

Ive used a ball for a hitch to get bearings out forcefully . Just take the nut off the shank and put the shank side in and pound away after you pull the axel spacer out of the inside of the hub of course . Its worked on many different kx250's Ive had . If all else fails keep soaking it and it will eventually come out.

[Coop]

Put your new bearings in the freezer. Once they are good and cold (an hour), take one out and place it over the
hole and use a ... socket that is the same size as the bearing.

Bearings use an interference fit so they may appear to be too big.

dogger

Good advice. I have done the freezer and socket technique successfully so many times I can't remember. It works very well.

[xandyx]

Put your new bearings in the freezer. Once they are good and cold (an hour), take one out and place it over the
hole and use a ... socket that is the same size as the bearing.

Bearings use an interference fit so they may appear to be too big.

dogger

Good advice. I have done the freezer and socket technique successfully so many times I can't remember. It works very well.

this is what i use to do when i rebuild superchargers. bearings on the freezer and casings in the oven. the bearing softly goes in.

[cnrcpla]

Well, I am taking it into the shop tomorrow. I am going to try to use a perfectly fitted tool for the job, if not maybe a puller. The break side bearing is way to big, it overlaps the actual hole by 2mm... I would need some liquid nitrogen to get it cold enough to contract that much 

[MetalMike1982]

sounds like you have the wrong bearing for your wheel .

[cnrcpla]

I do, I re-ordered the right ones. That is actually what inspired me to start my project.