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Old 10-18-07, 05:27 PM   #1
playera
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Derailleur hanger bolt too tight

How much should a Rear Derailleur "swing" when bolted to the hanger?

I've rebuilt the hanger bolt section of the der with clean and lube. When attached to the hanger, the der doesn't rotate easily unless I back off about a turn.

Does the der need to rotate? Why might it not rotate?

Thanks
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Old 10-18-07, 09:21 PM   #2
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Perhaps you made an error in reassembly. Did you install the return spring correctly?

The hanger bolt torque should have no effect on the pivoting action of the derailleur.
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Old 10-19-07, 06:59 AM   #3
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The bolt was reassembled correctly. It's just tight. It has grease and oil lube.
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Old 10-19-07, 07:23 AM   #4
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re-check

Sounds like you need to double check your assembly. seals,c-clip,etc.
What is the make and model derailleur?

http://www.parktool.com/repair/readhowto.asp?id=76
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Old 10-19-07, 08:15 PM   #5
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The derailleur is an old Shimano from 1986, no name.

I really think it was reassembled correctly. It was tight to rotate before disassembled. And, should the derailleur swing very easily?
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Old 10-20-07, 01:44 AM   #6
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non-binding

Pivot is spring loaded.
After the bolt is torqued to spec. it should rotate without binding and spring back into position when moved.
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Old 10-20-07, 07:50 AM   #7
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Thanks. That's how my other bikes are. If this ever gets loosened up somehow, I'll write back.
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