TazR6 Posted May 30, 2008 Share Posted May 30, 2008 I have removed the roller bearing races and cups that were on the bike. They came out the headstock with little persuasion, and new ones went in with little drama. Im stuck though. This image is of the fork assembly as it was removed from the bike, minus the bearing (roller). I assume the bit remainling on the centre shaft is the race (the pic is looking at it from the back) and that it has to be removed? What is the best way to remove it? What do I do with the seal that is on this pic? Does it go back on? I should add that the replacements are tapered roller bearings. Many thanks indeed for any and all help. It is appreciated. Link to comment Share on other sites More sharing options...
Moderator mervin Posted June 1, 2008 Moderator Share Posted June 1, 2008 I have removed the roller bearing races and cups that were on the bike. They came out the headstock with little persuasion, and new ones went in with little drama. Im stuck though. This image is of the fork assembly as it was removed from the bike, minus the bearing (roller). I assume the bit remainling on the centre shaft is the race (the pic is looking at it from the back) and that it has to be removed? What is the best way to remove it? What do I do with the seal that is on this pic? Does it go back on? I should add that the replacements are tapered roller bearings. Many thanks indeed for any and all help. It is appreciated. look around the bottom of the race /stem you can see the join Take a small cold chisel (not a woodwork one) and tap it into the joint it should gradually part from the fork stem once it starts too move you can then lever it up, be careful not too damage the surface of the stem if you do clean it up before you try to fit the new bearing, and do not forget to put the seal in Merv Link to comment Share on other sites More sharing options...
TazR6 Posted June 1, 2008 Author Share Posted June 1, 2008 look around the bottom of the race /stem you can see the join Take a small cold chisel (not a woodwork one) and tap it into the joint it should gradually part from the fork stem once it starts too move you can then lever it up, be careful not too damage the surface of the stem if you do clean it up before you try to fit the new bearing, and do not forget to put the seal in Merv I sorted getting the lower cup off. Thanks for that. I messed up the new bearing though trying to drift it on. I slipped and wrecked the cage lol, so I have to get another one. Bugga. I think my best bet is a tube just bigger than the shaft, that fits nice against the inner race of the taper roller bearing and hit that. The old one was mega tight to get off, so I assume the new one will be as much of a pig. So, it is worth chilling the stem and heating the bearing? Will any damage be cause to the bearing by hotting it up? Any idea what the outer diameter of the steering stem is so I can try and find a piece of suitable tubing to use to drift it on with? Ideally, i could do with a press to slide it on, but sadly I dont have one lol. The seal will not go back on. The new bearings are a different size to the ball bearings that were on. So, Im just going to pack well with grease. Is that an ok thing to do? Link to comment Share on other sites More sharing options...
jeepurz Posted June 1, 2008 Share Posted June 1, 2008 you might try this, section of thread rods , assorted washers and old race used in place of the drift, I heated the head a little and put the bearings in the freezer overnight. then used thread rod to clamp it in. Link to comment Share on other sites More sharing options...
jeepurz Posted June 1, 2008 Share Posted June 1, 2008 oops also in pic is a bmx bike peg with race bolted to it to use to start bearing in place, its to hard to use a drift more to align before clamp is used. Link to comment Share on other sites More sharing options...
Moderator drewpy Posted June 1, 2008 Moderator Share Posted June 1, 2008 I used a plastic waste pipe as its just the right size, keep the seal on the bottom. and drift the bearing into place after warming up. Link to comment Share on other sites More sharing options...
TazR6 Posted June 1, 2008 Author Share Posted June 1, 2008 I will try the plastic pipe tip, thanks. Would have not thought of that in a month of sundays. Im not sure what the threaded rod and washer method is about. I cant visualize it. I have got my thick head on lol. So, the seal that was in place for the ball bearings is suitable for using with teh tapered bearing? I assume it will go "lip" up? Link to comment Share on other sites More sharing options...
jeepurz Posted June 1, 2008 Share Posted June 1, 2008 sorry not the best at explainin this stuff heres a link pics bout half way down, http://www.dansmc.com/steering_bearings.htm Link to comment Share on other sites More sharing options...
TazR6 Posted June 2, 2008 Author Share Posted June 2, 2008 Ahh. That is a good informative page. Thank you. The threaded bar to make a press that you suggested, is to get the bearing cups into the frame. I was able to do that. Im struggling to get the bearing over the steering stem on the triple clamp. Im sure I know someone with a hydraulic press, so I am going to get my thinking cap on today. Link to comment Share on other sites More sharing options...
TazR6 Posted June 2, 2008 Author Share Posted June 2, 2008 Another new bearing is on its way. All being well it will be here tomorrow. Link to comment Share on other sites More sharing options...
Moderator mervin Posted June 7, 2008 Moderator Share Posted June 7, 2008 you might try this, section of thread rods , assorted washers and old race used in place of the drift, I heated the head a little and put the bearings in the freezer overnight. then used thread rod to clamp it in. surely that is the wrong way round you ned to heat bearing and cool head as metal expands with heat merv Link to comment Share on other sites More sharing options...
yoda Posted June 7, 2008 Share Posted June 7, 2008 If the bearing is going into a housing, heat the housing. If the bearing is going onto a shft, chill the shaft. Link to comment Share on other sites More sharing options...
jeepurz Posted June 8, 2008 Share Posted June 8, 2008 If the bearing is going into a housing, heat the housing. If the bearing is going onto a shft, chill the shaft. LOL yup, I suck at explaining I better stick to links. Link to comment Share on other sites More sharing options...
Recommended Posts