Front derailleur won't shift after new cable

bikeit65

I have just replaced the cable on the front derailleur on my road bike its running ultegra 6800 now the derailleur won't shift without a lot of effort, anyone offer any help please. TiA

StillGoing

Have you re-indexed it?

bikeit65

What do u mean re/indexed

david7m

Did you only replace the inner? Are you sure you routed it correctly?

bikeit65

Yes just the inner, the tension on the cable it taut

lesfirth

Lots of instruction on Youtube.

The Rookie

Here you go, start at step 3 unless you moved the front mech
https://www.parktool.com/blog/repair-help/front-derailleur-adjustment

veronese68

Have you routed the cable correctly into the derailleur? That can have a marked effect on how much force is needed at the shifter. Looks like a few others have had problems with these, there's another thread here and various links and instructions. It seems there is a special tool for routing the cable into the mech, have you used that?
https://forum.bikeradar.com/discussion/12976309/ultegra-6800-no-trim/p1

StillGoing

bikeit65 said:

What do u mean re/indexed

If you disconnect the inner cable, you will almost certainly need to index the derailleur again and set the cable tension accordingly. Shimano shouldn't be stiff to operate. If you have set it up correctly, are you sure that you haven't frayed one of the cable strands inside the outer or the outer isn't full of gunk?

bikeit65

veronese68 said:

Have you routed the cable correctly into the derailleur? That can have a marked effect on how much force is needed at the shifter. Looks like a few others have had problems with these, there's another thread here and various links and instructions. It seems there is a special tool for routing the cable into the mech, have you used that?
https://forum.bikeradar.com/discussion/12976309/ultegra-6800-no-trim/p1

Yes its routed correctly watched a video on youtube and read the instructions on Shimano site

focuszing723

Back off the limit screw on the front derailleur (limit for the small ring). This will enable you to pull the cable and fix it at a lower tension. Then once you tighten up the limit screw the tension will increase enabling correct shifting.

mtb-idle

did you shift it into the smaller ring i.e. relax the tension on the shifter lever before fitting the cable? If you forget to do this the cable won't be tight enough

me-109

On the next, check that the cable is routed correctly around the cable clamping bolt. It won't work as well if it's on the wrong side, but shouldn't be that stiff.

Does the mech move at all with the lever?
Try disconnecting the cable and moving the next by hand to check for undue tension.
Hold the loose end of cable and operate the lever. Does the cable move freely in both directions?

bikeit65

Guys thanks for all your help, i took the cable out and started over again not sure what the problem was first time around but all is working ok now, had it out earlier on a wee run and its working as it should be.