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[url= http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/RD/EV-RD-M662-2814_v1_m56577569830646684.pdf ]B-axle assembly[/url] according to Shimano exploded diagram (No. 1).
Spares can be bought from [url= http://www.chainreactioncycles.com/Models.aspx?ModelID=28444 ]CRC[/url] or [url= http://oscommerce.tibolts.co.uk/product_info.php?cPath=26_30&products_id=182 ]tibolts[/url] if you're feeling especially flush.
All well & good but HTF are you supposed to remove the old one? It spins freely, but there's no movement back & forth, so I assume there's some sort of expanding clip? Looking at the pic below, I assume something recessed in the groove below the head.
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Threads are FUBARed & £6 to replace the bolt is more palatable than £35 for a whole new mech.
Yes there is a c-clip type thing hiding in there.
OK - that's identified what's holding it in place. How to get it out?
Something pointy to get underneath it and spring it out was my solution - of course that was probably the wrong thing to do but it did work!
Same here, I'm flummoxed by this. If I look in from the thread side I can see the c-clip. But what do I do to get it out? Do I push it down or try and lift it back towards the threaded side? Struggling.
Edit - not being responsible if you break it.