"Andre" <
[email protected]> wrote in message
news:<
[email protected]>...
> Anyone successfully followed shimano service instructions for the DA right STI lever? I can go up
> the block (larger cogs), but the small lever actuation sticks when going down. Thanks.
Assuming that it's not a cable problem (not a bad idea to replace the cable first)...
I recently fixed an Ultegra 600 shifter with the same problem. In essence, the mechanism has become
fouled with grease/dirt, etc.
I put the bike in my workstand and tipped it so the levers were pointing more or less at the floor.
Then, I released the rear brake cable so that I could open the shifter all the way. Then I pried up
the plastic disk that seals the back of the actual shift mechanism and pumped a large amount of WD40
through the shifter (tilting the bike limits damage to your bar tape). You want to use a LOT of WD40
for the flush; I went through between 1/2 and 1 cup. It's not a bad idea to put a bucket under the
shifter so you can catch the overflow.
Flush that sucker good, then work the shifter, keeping tension on the cable. For the bike I was
working on, this cleared the problem right up. Then squirt some light lube (TriFlow or ProLink) into
the mechanism, and all should be right with the world.
