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Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 1:35 am
by Catagory6
the cable is contacting the FD below the clamping bolt, so i need to get the FD-CE011 washer

but would that cause the FD to not lock into the large chainring? when i was out today, it worked fine for the first half of the ride. but coming back home, i would shift into the large chainring, and it would slip right back down to the small ring. sometimes it would lock in. but then a few seconds it would slip back.

i'm hoping this isn't an issue with the shifter itself.

Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 1:35 am
by Weenie

Re: Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 1:47 am
by alcatraz
Does the shifter not stay in the larger chainring click position?

Maybe there is dirt in that shifter mechanism. There are some ways to try and clean it.

Re: Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 1:52 am
by Catagory6
alcatraz wrote:
Mon Oct 01, 2018 1:47 am
Does the shifter not stay in the larger chainring click position?

Maybe there is dirt in that shifter mechanism. There are some ways to try and clean it.
yes, the shifter slipped. but checking it again on the stand, its operating fine now.

flush it out with WD540? it worked for a pre-'15 rear shifter with a sticky thumb lever

Re: Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 2:58 am
by alcatraz
I havent had to do this myself. I'd check youtube for a few pointers (plenty of videos on stuck shifting mechanisms). Try those solvents.

I think there is a little pivoting arm with a spring that grabs on a splined barrel. That arm's pivot point could be a bit stuck. That's where it needs cleaning/lubing is my guess.

Hopefully the splines on that barrel aren't worn out or anything. Keep fingers crossed.

Re: Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 3:09 am
by Calnago
Redo the setup from scratch. Get and install the washer and route cable correctly. Make sure the outer limit screw is backed out while doing the setup. Fine tune the tension on the cable. Don’t set the outer limit screw until all the fine tuning of cable tension has been complete. In the meantime, just be careful not to throw the chain to the outside while you fine tune things.

Re: Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 3:09 am
by Weenie

Re: Bit of an issue with 2015 Chorus FD

Posted: Mon Oct 01, 2018 3:13 am
by Catagory6
cool, thanks for the info
cable is barely making contact, but will get that washer anyway
of course its working fine now on the stand.