Question about Shimano Ultegra Fd 6600 Front Derailleur
High Gear LimitTo adjust the high-gear limit, shift the chain into your highest gear, that is, smallest sprocket in the rear, and the largest sprocket in the front. The high-gear limit prevents the chain from shifting past the largest chainwheel and throwing the chain out into your pedals. Ideally you want the cage to stop just after it clears the chain on the large chain ring.
Shifting AdjustmentsNow that both limit screws are set up, shift back to the largest sprocket in the rear, and the smallest in the front. Make sure your front shifter is in the lowest gear position, and pull the shift cable to eliminate any extra slack, before tightening the cable bolt.
Shift the front derailleur to the middle gear, and run through the entire range of rear sprockets to make sure the chain does not rub on either side of the front derailleur cage. If it does rub, you can adjust the trim by tweaking the barrel adjuster on your front shift lever. If you have an older friction shifter, often you will have to manually adjust the trim while riding.
This tutorial was based on the most common type of drivetrain, and assumes that you are using the components your derailleur was designed for. If you have a customized set of chainrings and/or derailleurs, you may need to try some different techniques, or even take your bike into a shop for further adjustment.
For more help click on this link directly
Also if there is problem in rear derailleur then it can be adjusted as follows:-check fig:--
click this link
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Posted on Jul 17, 2010
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Posted on Jan 02, 2017
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