New derailleur grinds on innermost cog
08-12-04, 08:06 PM
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New derailleur grinds on innermost cog
After replacing the Shimano C101 Megarange 7 Speed derailleur on my Specialized Expedition bike with a new one purchased from Ebay, the derailleur guide pully grinds against the innermost (Z) cog. Note that I replaced the new hanger pivot's mounting bolt and plate with the old one, as the new one came with a bracket mount whereas the old plate bolted into a direct mount (retaining the new spring and other new parts, of course). I am using the old chain (which I did not break apart) and cables which came with the bike. Up to the two innermost Y and Z cogs the derailleur indexing works pretty well, it is just too close to the sprockets to sit in the Y cog without rubbing against the Z and it does not jump up to the inside Z cog at all as it is inside it. Any idea what's wrong?
Some notes: There is no B screw to adjust on this derailleur. Except for the mount, the new C101 is an exact replacement of the original one and its 11T-34T capacity is the same as the original Shimano Magarange 11-34 sprockets on the bike. I followed Barnett closely, as well as Shimano's manual for that derailleur, except I did not re-string the cable.
Some notes: There is no B screw to adjust on this derailleur. Except for the mount, the new C101 is an exact replacement of the original one and its 11T-34T capacity is the same as the original Shimano Magarange 11-34 sprockets on the bike. I followed Barnett closely, as well as Shimano's manual for that derailleur, except I did not re-string the cable.
08-12-04, 08:12 PM
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feros ferio
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Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
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Is there a tension adjustment for the derailleur's upper spring? Is adding a link to the chain an option?
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
08-13-04, 05:11 AM
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I don't know how else to say this but I HATE those C101 and C201 derailleurs. Whenever the shifting starts to crap out (and it will) I replace them with an LX or even better an XT derailleur. Costs more but you'll be happier in the long run.
