Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Derailleur doesn't move

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Derailleur doesn't move

Old 05-17-19, 01:34 PM
  #1  
hrdknox1
Senior Member
Thread Starter
 
hrdknox1's Avatar
 
Join Date: Apr 2014
Posts: 158
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 42 Times in 31 Posts
Derailleur doesn't move

I have Shimano Dura Ace 10 speed with an 11-23 cassette. My derailleur shifts fine going down the cogs from 23-11 and up the cogs from 12-23. The problem is that, unless I have the cable super tight, the derailleur will not move the chain up from the 11 -12 cog after one click of the shifter. With the cable super tight it creates too much tension, and there is not enough slack for the derailleur to drop the chain back down onto the 11 cog.
I've adjusted the "H" and "L" screws to allow the derailleur to move freely. The cable and housing are new. Can't figure this out.....help!
hrdknox1 is offline  
Old 05-17-19, 01:49 PM
  #2  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,315 Times in 826 Posts
disconnect the cable ? still won't move by pushing it in with your hand ? replace it,


It will? replace cables & housing..



H is outside stroke limit L is inside stop.. nothing more ..

Shop Tool , check of derailleur hanger alignment always a good start











/....

Last edited by fietsbob; 05-17-19 at 05:01 PM.
fietsbob is offline  
Likes For fietsbob:
Old 05-17-19, 01:52 PM
  #3  
Aubergine 
Bad example
 
Join Date: Nov 2015
Location: Seattle and Reims
Posts: 2,925
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 775 Post(s)
Liked 21 Times in 18 Posts
Welcome to the fun and exciting world of adjusting indexed shifters! When that happens I undo the cable and start all over again. Make sure the cable is attached exactly as designed, tight but not too tight, and try adjusting it again.
__________________
Keeping Seattleís bike shops in business since 1978
Aubergine is offline  
Old 05-17-19, 01:52 PM
  #4  
ridelikeaturtle
Senior Member
 
ridelikeaturtle's Avatar
 
Join Date: Nov 2015
Location: Dublin, Ireland
Posts: 1,178

Bikes: Bianchi Ti Megatube; Colnago Competition; Planet-X EC-130E; Klein Pulse; Amp Research B4; Litespeed Catalyst; Fondriest Squadra Corse; Trek Y11

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 545 Post(s)
Liked 357 Times in 213 Posts
The limit screws will only limit the range of the derailleur so it does not exceed the range of the cassette - so set those limits independently of the shifting. If they're not letting the derailleur cover the range of the cassette, obviously that'll cause a problem. But it sounds like you've got this fairly OK, just double-check it's just limiting the derailleur to "not go too far" at the ends of the range.

I think there should be detailed instructions online, on how to adjust your specific derailleur, maybe even a YouTube video? Starting in the center of the cassette, lining up the derailleur so it's dead on, then going through the gears...

One way I've done most of mine is to start with the cable tension quite tight and on the smallest gear (11 cog), with the adjustment barrel most of the way in. While pedaling, turn the adjustment barrel out until your chain wants to start to shift up to the 12 cog, then back it off 1/2 a turn. Then check to see that you can shift up and down through all the gears.
ridelikeaturtle is offline  
Old 05-17-19, 02:34 PM
  #5  
shelbyfv 
Senior Member
 
shelbyfv's Avatar
 
Join Date: Jun 2007
Location: TN
Posts: 8,366
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 2259 Post(s)
Liked 2,189 Times in 1,188 Posts
If this behavior began when you replaced the cables and housing, check all that again. It sounds as if there is friction preventing the free release of the cable. FWIW, this can be an indication of a cable fraying inside the shifter, though that's unlikely with your new cables.
shelbyfv is offline  
Old 05-17-19, 02:38 PM
  #6  
Weresquatch
Senior Member
 
Join Date: May 2019
Location: Pacific NW (of the US)
Posts: 74

Bikes: Just the normal stuff, cruisers, duilies, fatbike, road bikes, single speeds...

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked 12 Times in 11 Posts
Sounds like a friction issue to me. I'd start with my high/low backed all the way out and make sure my cables are loosey-goosey...while you're checking all that perhaps have some lube sprayed on the derr and let it soak in...
Weresquatch is offline  
Old 05-17-19, 04:35 PM
  #7  
zacster
Senior Member
 
Join Date: Jul 2004
Location: Brooklyn NY
Posts: 7,138

Bikes: Kuota Kredo/Chorus, Trek 7000 commuter, Trek 8000 MTB and a few others

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Liked 241 Times in 193 Posts
Another thing to check is the derailleur hanger alignment. If it is bent the derailleur won't shift properly.

Assuming the cables are ok and the hanger is OK, then watch this:

zacster is offline  
Old 05-17-19, 04:40 PM
  #8  
Bill Kapaun
Really Old Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 12,660

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1337 Post(s)
Liked 558 Times in 422 Posts
Also make sure the cable is properly clamped in the RDER.
If it's not a "straight shot", it may be binding.
Bill Kapaun is online now  
Old 05-28-19, 10:47 AM
  #9  
hrdknox1
Senior Member
Thread Starter
 
hrdknox1's Avatar
 
Join Date: Apr 2014
Posts: 158
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 42 Times in 31 Posts
Problem solved. I lengthened the cable loop at the derailleur. It is quite big, but shifting is now ideal.
hrdknox1 is offline  
Likes For hrdknox1:
Old 05-28-19, 03:28 PM
  #10  
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 16,032

Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 259 Times in 168 Posts
Originally Posted by hrdknox1 View Post
Problem solved. I lengthened the cable loop at the derailleur. It is quite big, but shifting is now ideal.
Very true.
I'll bet shifting would be also be ideal if the loop were a bit less lengthy.
__________________
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
JanMM is offline  
Old 05-28-19, 09:06 PM
  #11  
xiaoman1 
Awaiting Parole
 
xiaoman1's Avatar
 
Join Date: Mar 2014
Location: Weird Coast City of the Angels
Posts: 4,028

Bikes: A few too many

Mentioned: 38 Post(s)
Tagged: 1 Thread(s)
Quoted: 926 Post(s)
Liked 899 Times in 562 Posts
^^^ yes!
__________________
"STAND UP FOR WHAT IS RIGHT EVEN IF YOU ARE THE ONLY ONE STANDING"

xiaoman1 is offline  
Old 05-29-19, 08:30 AM
  #12  
trailangel
Senior Member
 
trailangel's Avatar
 
Join Date: Feb 2014
Location: Pasadena, CA
Posts: 4,612

Bikes: Schwinn Varsity

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1765 Post(s)
Liked 526 Times in 311 Posts
That loop is excessively long. I would be embarrassed to ride that.
trailangel is offline  
Old 05-29-19, 09:14 AM
  #13  
rosefarts
With a mighty wind
 
Join Date: May 2015
Posts: 1,735
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 669 Post(s)
Liked 374 Times in 229 Posts
A lot of people screw up their shifting wth too short of housing in the rear loop. Youíre on the right track.

I think youíve overdone it. Iím certain you can achieve smooth cable pull on a shorter loop.

If you canít, Iíd suggest a smoother inner cable.
rosefarts is online now  
Old 05-29-19, 10:26 AM
  #14  
Weresquatch
Senior Member
 
Join Date: May 2019
Location: Pacific NW (of the US)
Posts: 74

Bikes: Just the normal stuff, cruisers, duilies, fatbike, road bikes, single speeds...

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Liked 12 Times in 11 Posts
Originally Posted by hrdknox1 View Post
Problem solved. I lengthened the cable loop at the derailleur. It is quite big, but shifting is now ideal.
You're surely having a joke, right? I run those lil Avid thingamajigs on a few of my bikes....they work well to largely eliminate that snag-catcher on my off-roady bikes.
Weresquatch is offline  
Old 06-02-19, 07:17 PM
  #15  
hrdknox1
Senior Member
Thread Starter
 
hrdknox1's Avatar
 
Join Date: Apr 2014
Posts: 158
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 42 Times in 31 Posts
Originally Posted by rosefarts View Post
A lot of people screw up their shifting wth too short of housing in the rear loop. Youíre on the right track.

I think youíve overdone it. Iím certain you can achieve smooth cable pull on a shorter loop.

If you canít, Iíd suggest a smoother inner cable.
I have shortened it, and shifting is still good. I had it extra long just to test if length was the issue.
hrdknox1 is offline  
Likes For hrdknox1:
Old 06-03-19, 09:45 AM
  #16  
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 16,032

Bikes: Bacchetta Giro A20, RANS V-Rex, RANS Screamer

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 608 Post(s)
Liked 259 Times in 168 Posts
Originally Posted by hrdknox1 View Post
I have shortened it, and shifting is still good. I had it extra long just to test if length was the issue.
Excellent!
__________________
Bacchetta Giro A20, RANS V-Rex, RANS Screamer
JanMM is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.