Rethreading chain - after derailleur dismantling (is it necessary to break the chain?

[YorkshireGull]

(09-06-2015, 05:35 PM)painkiller Wrote:  no need to break the chain. Can you post a side view pic of what you have going on?. your rear plate and top pulley need to be attached but loose, then set your bottom pully on the inside of chain and place into position making sure it is on the top side of the little bent tab on the plate.

Thanks Painkiller for your reply. Here is a link to a photo -

(sorry - I could take a better one in the morning as late here and now dark!).PLEASE note that tinypic has flipped the photo so the picture is upside down (aahh!) - But you can see how the derailleur is failed to "set" to it's correct position (I.e. not taught at all). It's like it's on the wrong way round but once you incurl it manually it is the right way round and chain on the right side (as per the other bikes in my garage).

Another link to photo here:
http://tinypic.com/m/iymzy0/1