Crank shoulder repair options

I would pursue the loctite if you can not get a new crank from GG.They make some really amazing stuff and they have a link on their web site for tech questions/applications. The make a few different kinds of bonding products for cylindrical part assemblies.
Having said that, I am having a similiar problem on my bike but the cases are a slip fit to the bearings instead. I tried loctite 620 this summer and it seemed to work but when I disassembled the cases last week I could see that the bearing had been moving. I am not sure if I had it clean enough and also when I tightened the primary gear onto the crank, the crank centers itself in the cases and that may have broken the bond.:think
Anyway, I am going to make sure it is clean and give it another go, it is definitely less costly than any other options and I have heard a lot of good things about the stuff.

GlennP, where does GGNA stands for.(i am a dutchie, so be kind with me)
and i also have read yr other thread about the bearings specs.(dealing the same problem).
I really thing that eric must answer this one, or any other highschooled mecanic with this kind of experience.
It really $#$% when you find out it is bad engineering. Hope you get yr answers soon.

Originally posted by GlennP
Its not bad engineering, but bad machining/QC.

Click to expand...

What's that, a Spanish bike with a quality problem?
Say it isn't so. :scream:

While your at it, ask GGNA for a service manual. You'll probably get a new crankshaft before we ever see a service manual. ;)

Good luck and keep us posted.

they're built like that so you can change your crank in the woods using a tire iron man! :)