Cannot get to the lowest cog

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07-22-16 | 09:09 AM

#26

L134

Senior Member

Joined: Dec 2015

Posts: 916

Likes: 468

From: San Diego

Bikes: 1978 Bruce Gordon, 1977 Lippy, 199? Lippy tandem, Bike Friday NWT, 1982 Trek 720, 2012 Rivendell Atlantis, 1983 Bianchi Specialissima? 1998 Serotta Atlanta, 1981 Dave Moulton

Quote:

Originally Posted by scarleton

I read page 55, I am not 'getting it', care to expand on things a bit?

I don't want anything on my bike that has a 55 page manual that goes with it.

07-22-16 | 11:36 AM

#27

rm -rf

don't try this at home.

Joined: Jan 2006

Posts: 6,220

Likes: 704

From: N. KY

Quote:

Originally Posted by L134

See page 55 of the dealer manual.

My goodness, I've just been convinced that Di2 is not for me!

If you looked at the pdf, you'd see that it covers every step in detail, and includes a bunch of different optional equipment. Depending on the bike frame, there's different ways of running the wires, too.

It uses 2 pages just to discuss installing the frame grommets!

I like it, there's no assumptions about the mechanic's previous experience, and lots of helpful diagrams.

By the way, adjusting the Di2 rear derailleurs are way easier than a mechanical derailleur.

~~~~~
For the same level of detail on a 1990 bike:
Brake shifter install: positioning, clamping, running cables, trimming cable housing, etc: about 5 pages.
Bar ends: 4 pages
downtube shifters: 3 pages
front derailleur: braze on, or clamp on. positioning on frame. cutting cable housing, routing of cable: 5 pages
rear deraileur: cutting cable, mounting: 3 pages
front derailleur tuning: 4 pages
rear derailleur tuning: 5 pages

That's 30 pages already.

Last edited by rm -rf; 07-22-16 at 11:42 AM.

07-22-16 | 11:41 AM

#28

rm -rf

don't try this at home.

Joined: Jan 2006

Posts: 6,220

Likes: 704

From: N. KY

Quote:

Originally Posted by scarleton

I honestly don't know what happened. Nothing was lining up and it simply wasn't working then I move the low-side stopper bolt out just a touch more. It looked like it was still lining up with the second largest sprocket, but then when I shifted it snapped into the lowest gear. So very strange! It still doesn't look like it should be in the lowest gear, but it shifts there! Guess there something to reading the manual!!!!

Glad you got it working again. I guess that's why the stopper / limit screws are done after the cogs are aligned. Any resistance from the motor at the high or low cog, and it won't shift there.

07-22-16 | 11:44 AM

#29

ljsense

Senior Member

Joined: Sep 2009

Posts: 771

Likes: 166

From: Madison, Wis.

When I saw the title of this thread, I thought of one solution to this issue (but not with Di2) and that's to look at the cable clamp.

If it's turned 90 degrees (installed wrong) the tab goes into the parallelogram on some models and prevents it from closing all the way.

Just thought I'd drop this in in case someone googles for a solution to this problem and ends up here.

One other thought, and that is bend metal last. Read manuals first. I'd be surprised if torquing on the hanger was necessary.