Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-27-07, 03:43 PM   #1
Eiknujrac
Newbie
Thread Starter
 
Join Date: Jun 2007
Bikes:
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano Sora FD Won't Shift Up

I have a Jamis Satellite that I bought just under a year ago, and after some down time I've begun riding it again.

The problem is, the FD won't shift up into the higher chainrings. I followed the FD adjustment guide on the parktools website, setting the L stop screw, however when it says to shift up and set the H, I can't. It seems like the FD just isnt moving enough to shift the chain to the bigger chainrings. I've taken all the slack out of the cable from the clamp bolt. Even adding tension from the barrel adjuster won't make a difference. Anyone got an idea of whats wrong?

I searched the forum but couldn't find anything, so I apologize if this question has been asked before.

Anything helps, Thanks!
Eiknujrac is offline   Reply With Quote
Old 06-27-07, 04:25 PM   #2
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You probably haven't taken out enough slack.

Detach the cable and operate the dérailleur by hand. Does it travel far enough? If you're careful you can try shifting by hand, but don't get your fingers caught! (Don't even try it without a stand.)
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 06-27-07, 04:26 PM   #3
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,065
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Have you used needlenose pliers to hold the cable taut while you tighten the cable anchor bolt on the derailleur while the derailleur is in the low stop position? That's what I do as a starting point for cable tension, making sure I've got some adjustment room both ways with the barrel adjuster for fine tuning later. It does sound like the likely cause is not enough cable tension, I'd do whatever you gotta do to tighten it some more (loosen the anchor bolt and re-secure the cable after taking up slack, or at least turn the barrel adjuster counter-clockwise some more). If that's not it, maybe the derailleur got knocked out of position during the downtime, or the shifter got damaged in some way. Did it ever work properly, when you rode the bike in the past? What kind of shifter is it, and does it feel like it's moving properly?
well biked is offline   Reply With Quote
Old 06-27-07, 07:29 PM   #4
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,529
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
Was it ever right?

If it worked right once and it doesn't now, it's probably not the derailleur. That leaves the shift cable and the shifter.

Try disconnecting the cable from your front derailleur. Hold the cable taut with your fingers and try cycling the shifter. If you can feel cable movement, in and out as you shift, the cable and housing are probably OK.

If that's the case, be sure to first cycle your shifter into the smallest gear position, pull the cable taut with a needlenose pliers, and reattach it to your derailleur.
Retro Grouch is offline   Reply With Quote
Old 06-27-07, 07:37 PM   #5
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Retro Grouch
... pull the cable taut with a needlenose pliers, and reattach it to your derailleur.
I use a curved needle-nose for that. Prop the center of the curve against the anchor or nearby and you can get a serious amount of tension on the cable.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 06-27-07, 07:58 PM   #6
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Retro Grouch
Was it ever right?

If it worked right once and it doesn't now, it's probably not the derailleur. That leaves the shift cable and the shifter.

Try disconnecting the cable from your front derailleur. Hold the cable taut with your fingers and try cycling the shifter. If you can feel cable movement, in and out as you shift, the cable and housing are probably OK.

If that's the case, be sure to first cycle your shifter into the smallest gear position, pull the cable taut with a needlenose pliers, and reattach it to your derailleur.
+1 What Retro said.
Be sure to shift into the smallest chainring position before attaching the cable.
Al1943 is offline   Reply With Quote
Old 06-27-07, 08:49 PM   #7
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You don't need to pull anything taught. Just set the limit screw so that it (the FD) is in a position that is lower than it'd ever be when it's properly adjusted. And yeah make sure you've shifted into the lowest ring before you attempt to set the cable.

Then tighten the limit screw once the cable is anchored and voila.
operator is offline   Reply With Quote
Old 06-28-07, 08:23 AM   #8
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You're just using the limit screw to tighten the cable. That will only work if you've backed it off just enough. Either way you stand to muck up two adjustments instead of one. I prefer to leave the limit screw alone and deal with the tension directly. Seems faster, too.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 06-28-07, 08:33 AM   #9
well biked 
biked well
 
well biked's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 7,065
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by DMF
You're just using the limit screw to tighten the cable. That will only work if you've backed it off just enough. Either way you stand to muck up two adjustments instead of one. I prefer to leave the limit screw alone and deal with the tension directly. Seems faster, too.
I agree, especially since it seems very possible the OP's limit screws are already adjusted properly. No reason to mess with the limit screw adjustment right off the bat in this case, try cable tension first-
well biked is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 05:38 AM.