aka Tom Reingold
Join Date: Jan 2009
Location: New York, NY, and High Falls, NY, USA
Posts: 40,503
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Mentioned: 511 Post(s)
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The picture also shows that the derailleur hanger is bent. The jockey wheels of the derailleur should be in the same plane as the sprockets. You can use brute force to bend the hanger back. Slip an adjustable wrench over the hanger. Then slip another adjustable wrench to bend the first wrench. I think you have to bend the bottom edge out (away from the wheel) and also clockwise (i.e. the front of the derailleur is pointing to the left).