Support road.cc

Like this site? Help us to make it better.

forum
road.cc bike forum

Ultegra Di2 Front Derailleur not going into adjustment mode

by Cyclosis
Mon, Apr 14, 2014 11:15
7

Hi Folks,

Wonder if anyone can help me, or has had a similar problem.

I have a 6870 front derailleur that doesn't want to go into micro adjustment mode, when I click either of the left shifters (having pushed the button on junction A) it doesn't micro adjust, the red light just flashes on the junction box.

I can't find any thing in the documentation, nor anywhere on the web, about the junction light flashing or an error or anything.

Otherwise it all works and shifts fine. Strange! It also had been micro adjusting fine up until yesterday too.

Anyone had any similar problems?

Cheers,

Jim

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

Add new comment

7 comments

Avatar
M3IT | 8 years ago
2 likes

I know this page is old, but it was one of very few hits from a search about this problem, so I thought I'd post the solution (that I found by finally RTFMing) in case it helps someone else.

For Di2 front deraileur microadjustment, the adjustment entry mode (entered by holding the button on the junction box), has to be entered with the chain on both big cogs - both front and back.  Refer diagram from page 57 of the manual.

Avatar
Diesel Engine replied to M3IT | 4 years ago
0 likes

This was really helpful thanks, I had the same issue and hadn't realised it had to be specific positions.

Avatar
wellcoordinated | 10 years ago
0 likes

The battery needs charging? When the battery gets depleted only the rear derailleur works.

Avatar
Cyclosis | 10 years ago
0 likes

Ah! That Tri forum one is a helpful link, thanks! I'll see if any of the advice there helps.

Cheers!

Avatar
movingtarget | 10 years ago
0 likes

Don't know if you've already come across this but someone on one of the tri forums had probs getting his FD to micro adjust too. The OP didn't follow up so don't know how things turned out but they referred him to pages 57-58 in the Shimano manual for doing micro adjustments.

http://si.shimano.com/php/download.php?file=pdf/dm/DM-UL0001-00-ENG.pdf

Here's the tri forum thread too if that helps

http://www.forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_For...

Avatar
Cyclosis | 10 years ago
0 likes

Hi Dave,

Thanks for the reply, but that video is for the 6700. I'm using the newer 6800 which does have electronic adjustment.

It was working fine until yesterday, now all I get is the flashing red light, which isn't mentioned in any of the documentation.

Jim

Avatar
dave atkinson | 10 years ago
0 likes

All of the front derailleur adjustments are mechanical, using the limit screws on the body of the unit.

Here's a helpful vid:

https://www.youtube.com/watch?v=PU2kQp9IeBc

Latest Comments