Bicycle Mechanics - Old Simplex Derailleur problem on my old Peugeot UO8

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rivas7200
09-27-11, 01:05 PM
Yes, I know, I should just replace the plastic simplex with a better derailleur.
But since I'd like to keep it, here's my problem and I am hoping someone can shed some light.

Problem: RD
Here's a video describing the issue.
http://www.youtube.com/watch?v=TjwuayHZilo

Here's an upside-down pic. The circled pin should be applying force down and instead, as soon as I let go of the jockey cage, it flips back.
http://farm7.static.flickr.com/6180/6189322155_7aafb1d075.jpg (http://www.flickr.com/photos/56994630@N02/6189322155/)

(http://www.flickr.com/photos/56994630@N02/6189322155/)

catmandew52
09-27-11, 01:20 PM
You have got your chain threaded wrong. Should look like this220478
rivas7200
09-27-11, 01:30 PM
That's what I thought and I tried routing it different ways and it still is not right.

catmandew52
09-27-11, 01:40 PM
Check out the various pdf's at Shimano. http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.
dsbrantjr
09-27-11, 02:23 PM
catmandew52: Your link is truncated. Here's the full link: http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.htm Nice resource!
catmandew52
09-27-11, 02:42 PM
catmandew52: Your link is truncated. Here's the full link: http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.htm Nice resource!

Yeah, don't know how that happens.