stuck lay bearing

Joined
Jul 6, 2007
Messages
32
Country flag
I've been trying for two hours to remove the layshaft bearing from the gearbox shell. I've used enough heat to make Satan sweat. Any tips ??
 
Joined
Jun 14, 2007
Messages
1,732
Country flag
How about a bearing slide hammer? You may not even have to buy one - places like Autozone will often let you use them free - you have to leave a deposit, but you get it back when you return the tool. - BrianK
 
Joined
Aug 21, 2006
Messages
748
Country flag
dpmellish said:
I've been trying for two hours to remove the layshaft bearing from the gearbox shell. I've used enough heat to make Satan sweat. Any tips ??

Is the gearbox still in the frame? If it is out, heat in an oven (or I use my gas BBQ) for 30 minutes. Invert and bang against a block of wood. Should drop right out.
 
Joined
Aug 21, 2006
Messages
748
Country flag
dpmellish said:
I've been trying for two hours to remove the layshaft bearing from the gearbox shell. I've used enough heat to make Satan sweat. Any tips ??

Check out a previous thread labeled "beraring in mind". Lots of discussion there about bearing removal and replacement, pros and cons of taking the gearbox out of the bike to work on it etc. Are you replacing with a roller bearing?
 
Joined
Jul 6, 2007
Messages
32
Country flag
the gearbox is out of the bike. I guess i'll try the oven idea. THANKS for the help.
 
Joined
Aug 21, 2006
Messages
748
Country flag
dpmellish said:
the gearbox is out of the bike. I guess i'll try the oven idea. THANKS for the help.

I found heating up to about 300F for 30-45 minutes was sufficient to get it out. I set the gearbox shell on a cookie sheet covered with aluminum foil to prevent oil from running onto the grates and onto my steaks!! Doing this outdoors is really superior. Using the oven in your house really smells up the house and is probably pretty toxic. Plus, your significant other may ban you to the workshop for life. :)

When you go to put the new bearing back in, put it in a freezer for a few hours. Then heat up the case in the same way and the bearing should drop right in without any banging on it at all.
 
Top