davidbarr Posted July 23, 2012 Report Share Posted July 23, 2012 Basically, a few days ago my drive side bearing in my rear Echo TR hub crumpled. I bought a new bearing to fit but have a bit of a problem as the outer race is still stuck in the hub. Obviously I can't bash it out with the axle but I have tried screwdrivers and other long metal tools but there just isn't enough material to get enough force to bash it out. Really not too sure as to what I could do to get it out. Any help would be greatly appreciated as I'm meant to be riding on Thursday. Anyway, here's some pictures as I probably haven't explained very well. A Quote Link to comment Share on other sites More sharing options...
SunnyBoy Posted July 23, 2012 Report Share Posted July 23, 2012 (edited) That looks pretty awkward to get out! Only thing I can think of is to use plenty of penetrating lubricant around the outer ring then tap around it from the other side with a hammer and punch until it shifts - or try tapping a really fine point (like a scriber) under it and see if that helps. Either that or grind / hacksaw a split in the race - although you'd have to be pretty careful. Edited July 23, 2012 by SunnyBoy Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 23, 2012 Author Report Share Posted July 23, 2012 That looks pretty awkward to get out! Only thing I can think of is to use plenty of penetrating lubricant around the outer ring then tap around it from the other side with a hammer and punch until it shifts - or try tapping a really fine point (like a scriber) under it and see if that helps. Either that or grind / hacksaw a split in the race - although you'd have to be pretty careful. Yes, it's a bit of a nightmare really! I'll try lubing it up. I've been tapping it with a screwdriver from the other side for a good 20 minutes with no joy. I had to bend the screwdriver to make sure the tip of it hits the race because it's such an awkward position to get in at. Quote Link to comment Share on other sites More sharing options...
stunt man t Posted July 23, 2012 Report Share Posted July 23, 2012 (edited) have you tried hitting the middle bit of the race, or put the blade of a screwdriver in the middle then leavering it out like digging a hole with garden spade (if you no what i mean?) lay it across the hub/?? or drill a little bit out the race so u get enough to put a screwdriver in? Edited July 23, 2012 by stunt man t Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted July 23, 2012 Report Share Posted July 23, 2012 I've been tapping it with a screwdriver from the other side for a good 20 minutes with no joy. I had to bend the screwdriver to make sure the tip of it hits the race because it's such an awkward position to get in at. That should work, but get the sprocket off if you can, at the moment it'll be compressing the hub shell and bit and making the bearing tighter: http://www.tartybikes.co.uk/media/guides/maintenance_freewheel_and_sprocket_removal/m1.html Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 23, 2012 Author Report Share Posted July 23, 2012 have you tried hitting the middle bit of the race, or put the blade of a screwdriver in the middle then leavering it out like digging a hole with garden spade (if you no what i mean?) lay it across the hub/?? or drill a little bit out the race so u get enough to put a screwdriver in? I've tried levering it out but the screwdriver either slips out or just bends. It is far too tightly stuck in there to lever out I reckon. Thanks anyway. That should work, but get the sprocket off if you can, at the moment it'll be compressing the hub shell and bit and making the bearing tighter: http://www.tartybike...removal/m1.html Cheers Adam. I'll give that a try. Quote Link to comment Share on other sites More sharing options...
ezgonzo Posted July 23, 2012 Report Share Posted July 23, 2012 The best way i've found to remove an outer bearing race as pictured above , is to weld a couple of little blobs on the inside of the bearing race, then when the it cools down just tap the welds in the same manor as you would when removing a complete bearing, if you don't have a welder handy then like others have suggested, a bent screwdriver will eventually do the job, the only thing to make sure of when using this method is to make sure that the hub is on a nice solid surface, if you've just got the hub on your lap then pretty much all the force your generating when hitting the bearing is going to be absorbed by your legs. Quote Link to comment Share on other sites More sharing options...
trialsiain Posted July 23, 2012 Report Share Posted July 23, 2012 my dad used heat gun to expand alloy worked on my atomz hub Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 23, 2012 Author Report Share Posted July 23, 2012 I can't get the sprocket off. Got the vice as tight as I can but the chain is slipping. I'll look into getting someone to weld some tabs onto it as that sounds like a good idea. Thanks guys. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted July 23, 2012 Report Share Posted July 23, 2012 Try this: 1 Quote Link to comment Share on other sites More sharing options...
davidbarr Posted July 23, 2012 Author Report Share Posted July 23, 2012 Ended up splitting the bench my vice is attached to trying to take the sprocket off so gave up on that Eventually managed to bash the race out with a slightly larger screwdriver. Happy days! Thanks for all the help guys Quote Link to comment Share on other sites More sharing options...
Maxx Posted July 23, 2012 Report Share Posted July 23, 2012 Try this: I did this in the past and I crack the sprocket (between teeth) because the vice was too tight (but I had no choice, it slipped). The sprocket wasn't touching the vice, but the chain pushed on it, and it cracked. The video's method (only chain held in the vice) always works great for me. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.