Front gear/derailleur Shimano shift won't work
I'm relatively new to cycling, with a 2005 Giant TCR-One and all Shimano Ultegra gear set, from gears through to 'flightdeck'. I believe it is the ST-6600 shifting lever. It has three clicks - small chainwheel, trimming, large chainwheel.
I've just done my first big clean of the bike (amazing amount of grease, etc!) and I noticed my front gear cable seemed 'slack' so I loosened the hexagonal bolt holding it to the assembly to pull it a little tighter. No problem with that.
Problem is now I cannot select on the st-6600 lever the top chainwheel (ie, I can't use the lever to pull across the chain guide plate). I can shift from 'small' to 'trimming' but I can't click again up to 'large', the most important setting.
Help! Even with the cable completely free the lever won't shift the second click.