Brian Sorrell

I have searched for answers on this, and I'm just not sure if I'm finding the right information. My problem is that I want to remove the cranks / bottom bracket from my wife's bike -- a 2006 Scott Contessa Speedster. They are 105 cranks, and from what I can tell they are the "Octalink" sort -- or ISIS -- I can't figure that out, frankly. There are two allen bolts apparently holding the non-drive crank to the BB spindle, and there is what appears to be a plastic piece (shaped something like the Octalink stuff that I've seen in pictures now) threaded into the crank. There is no bolt of any sort on the drive side.

I don't want to destroy anything, but I want to get the darned cranks off. Obviously I need a special tool -- which drives me out of my tree, mind you -- but which tool? I fumbled around the Park site for a while but since I don't even know what to call these obscure parts, I don't know where to search or what to search for.

Help.

Dale-Murray

Undo the two pinch bolts then remove the plastic piece. The crank arm will come right off. The drive side will simply slide out of the bottom bracket.

shoerhino

It's an external bearing crank system. Most of them are very similar. Take a look here...

https://www.parktool.com/repair/readhowto.asp?id=122

LarDasse74

Mount the bike securely on a vertical milling machine and get the correct size end mill tool, then carefully remove the axle from the inside of the crank. DOn't take off too much, you'll risk damaging the finish on the cranks.

HillRider

These "humerous" postings can be amusing if the OP knows you are joking. If they are truly uninformed this can be very misleading.

At least add a "smiley" to indicate what you are doing.

Psydotek

Just note, the black plastic piece on the non-drive side crank arm needs to be unscrewed. It won't simply "pop off".

Brian Sorrell

Yeah, I got the joke. Gosh, you're helpful, LarDasse, and unbelievably amusing -- {groan}. I laughed so hard that my esophagus got lodged in a paranasal sinus cavity. Anyone know how to extract that? Is there a link on the Park site?

So unscrewing the plastic dust cover was the ticket. Once I got a look in there, it was fairly obvious what's happening. The crank didn't just come right off, but I wrestled with it and it worked.

shoerhino: that's exactly the link I needed. Again, I didn't know what this was called and the link you provided clears everything up.

Thanks everyone.

skiph

Basic tool:

https://www.jensonusa.com/store/produ...tion+Tool.aspx

Available other places also.

Or, if you need the external bearing removal 'socket wrench' & the bearing pre-load tool:

https://www.nashbar.com/profile.cfm?c...racket%2FPedal