Bicycle Mechanics - Front Derailleur H limit screw not working ?
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06-06-07, 07:17 AM
The chain in my bike is rubbing against my FD when I am in the big chain ring and small rear cog. From what I have read in this forum and the web, the H limit screw in the FD is used to move the outside of the FD cage to make this adjustment. However, no matter what I do with this screw (full clockwise or counter clockwise), the outside of the cage does not move. Am I missing something ? Thanks in advance.
BTW - I have a shimano 7800 FD. The L limit screw just works fine.
Needs more cable tension. Check the Park tool site on front derailleur adjustment.
From what I have read in this forum and the web, the H limit screw in the FD is used to move the outside of the FD cage to make this adjustment.
Not true. The high limit screw is to stop the derailleur from moving too far out.
Flip the small shifter several times to make sure all of the cable is out of the shifter. There should be no slack in the cable. If there is loosen the cable from the derailleur, take the slack out, be careful to re-attach correctly. The barrel adjuster can be used to add tension if needed.
Good advice above to use the derailleur adjustment instructions at http://www.parktool.com
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