Unresponsive ultegra 6700 lever
 

Hi guys,

My ultegra 6700 lever has gone 'dead'. It won't upshift or downshift.

This happened when I loosened the cable to adjust the RD, and when I reattached it, nothing moves. The chain was on the largest rear cog when I detached it - and I think that's the issue. I know it should have been in the smallest cog.

When I pushed the RD back onto the biggest cog and reattached the cable, nothing moves. The lever seems completely inert - the normal 'clicks' when shifting are completely absent.

Does anyone know the cause and how to solve this problem?

Has the cable become disloged at the shifter end?, if you hold on to the cable tight, and shift, it should move, does this happen? if not, remove the cable and reinstall.

Yep. The cable moves ever so slightly when I use the downshift lever, but nothing happens with the upshift paddle. Does this mean anything significant?

HAve you tried taking loosinging the cable, and starting the RD set up from scratch? are you in the correct gear with the shifter for the FD?

Yep - I've loosened the cable and checked the RD limit screws/barrel adjuster. The pulley bits are running smoothly, and the positioning is ok too. The FD is set to the microshift position to avoid rubbing - the RD currently aligns the chain on the smallest cog by default.

I'm pretty confident it's not a cable housing issue either. I moved it by hand and it slides in and out perfectly. The problem's persistence really puzzles me :S

Disconnect cable, and manually shift the lever down to the lowest rear cog (while disconnected). Shifter needs to be zeroed out (on the lowest cog position) before connecting cables back up.

I did read the tech docs - it recommended the same thing. But the lever won't click in either direction...

Try pushing the upshift paddle while simultaneously pulling outward on the main lever blade. If the main lever didn't fully retract to its resting position, it can prevent the upshift paddle's action.

RESOLVED!
http://bikeforums.net/attachment.php...hmentid=205418

Zoom in on the tech doc - there are some pen markings there.

The LBS loosened a 3mm allen bolt that ran through the shifter body. That seems to solve the problem. The screw is located on the shifter's posterior, facing the handlebar below the bar-mounting bracket screw.

We're not sure but he's guessing that a circular disk in the shifter assembly (not to be confused with the lever assembly) was warped and jammed up against the shifter body at times. Loosening the screw gives it a bit more latitude for movement. Either that or the screw tightened up with use - and I use it very frequently.

If it happens while I'm riding, he advises me to give the cable a few tugs and activate the upshift paddle. If all else fails, bring it to a shop and tell them about the solution.

I had similar but opposite issue. The 3mm screw is hold by an internal nut with the shape of a small plate. It is inside behind the lever, and can be seen by pulling the entire lever to the braking position (remove the front plate and brake cable). If you loosen up the 3mm screw too much, with use it can also become loose and maybe fall off. In my case being too loose I could not shift down to the small ring at all, as if the levers inside didn't engage. After troubleshooting that, this nut came appart and felt on the floor (thankfully it didn't happen while riding). After reading this, I knew where the issue was. It took me a little while to get the nut inserted. I used some tweezers, 2 3mm hex wrenches and a lot of patience. After engaging the screw, and tied up the bolt (not so tight), things were back to normal. To conclude if the 3mm screw is too loose it can also create shifting issues. I'm not sure if there is a specific torque for this screw, but might want to check it every so often, maybe every time you change the cables or housing.

WOw thanks for the tip! At least we now know how to access the receiving end of that interface!

Haven't worked on this generation of STIs yet... looks like a lot of changes.

Zombie thread OP, you da man!!!!