Those small photos aren't of much use.

Looks like the derailleur is no longer on the bike so we can't even see if there's anything wrong with the setup.

Did you see post #20 about the model numbers?

If this is a secondhand derailleur the 'Bracket Axle Unit' on it might be bent, a bent 'Bracket Axle Unit' will have the same effect as a bent derailleur hanger.
*The 'Bracket Axle Unit' is the link that attaches the derailleur to the bike.

People often attach Shadow rear derailleurs incorrectly with the 'Bracket Axle Unit' in a near vertical position, it needs to be in a horizontal position to work properly.

Is there a barrel adjuster for you to adjust the cable tension after the cable is attached to the derailleur ?


You might be able to see where the problem is if the bike was on a work stand, you could turn the crank slowly and look closely at the chain, cassette & derailleur.