Can't remove rear derailleur

zhang

I'm trying to get my rear derailleur (shimano 2200) off to service/replace it. The top pivot (I think they call it the B-pivot?) is seized and won't more freely, which is giving me problems. The problem is, when I use the allen key to loosen the derailleur mounting bolt it moves about 1/3 turn and then won't budget. I'm concerned that if I put any more pressure on it the derailleur hanger will bend!

Any ideas guys?

zhang

https://dl.dropbox.com/u/867382/Photo%2 ... 3%2001.jpg
https://dl.dropbox.com/u/867382/Photo%2 ... 3%2021.jpg

So that's pretty much what happens when I turn the allen key.

supersonic

They can take a fair bit of effort to shift - I have used allen keys three times that length and swung on them!

Try freeing the whole thing up with penetrating oil.

jonomc4

and add a little grease to the screw when you put them back on

desweller

Removal will be a lot more controllable if you take the chain and the cable off.