Replacing rear derailleur cable on Shimano Sora ST-3400
01-18-13, 02:22 PM
#1
Junior Member
Thread Starter
Join Date: Jun 2011
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Replacing rear derailleur cable on Shimano Sora ST-3400
Hi,
I have a Jamis Ventura Comp 650c and it badly needs a new rear derailleur cable. I've changed shifter cables on other bikes so I know the basic concept(s), but never on this bike. I've unthreaded the cable up to the shift levers on the handlebar, but I can't figure out how to get the cable out of the box. Will probably need advice on how to insert the new one as well. Fairly sure the shift levers are Shimano Sora ST-3400. Here's a picture:
Will be grateful to anyone who can help! Thanks and happy Friday
I have a Jamis Ventura Comp 650c and it badly needs a new rear derailleur cable. I've changed shifter cables on other bikes so I know the basic concept(s), but never on this bike. I've unthreaded the cable up to the shift levers on the handlebar, but I can't figure out how to get the cable out of the box. Will probably need advice on how to insert the new one as well. Fairly sure the shift levers are Shimano Sora ST-3400. Here's a picture:
Will be grateful to anyone who can help! Thanks and happy Friday
01-18-13, 04:03 PM
#2
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,089
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4206 Post(s)
Liked 3,871 Times
in
2,314 Posts
The typical method for STI is to first shift the lever into the high gear position (for the rear lever, for the front it would be the low gear. Either way it's the position that the lever goes to after clicking the release lever all the way). Then the spool inside the lever that holds the cable end should be lined up with the port on the outside of the lever. Then simply push the cable so that the end comes out this port. Sometimes the cable has a little bit of bend in it and a slight twist of the cable will help align the end with the port. Install is the reverse, thread the cable through the port and through the spool's cable head hole. The cable should exit the lever through the casing snout. Andy.
01-18-13, 04:12 PM
#3
Junior Member
Thread Starter
Join Date: Jun 2011
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
The typical method for STI is to first shift the lever into the high gear position (for the rear lever, for the front it would be the low gear. Either way it's the position that the lever goes to after clicking the release lever all the way). Then the spool inside the lever that holds the cable end should be lined up with the port on the outside of the lever. Then simply push the cable so that the end comes out this port. Sometimes the cable has a little bit of bend in it and a slight twist of the cable will help align the end with the port. Install is the reverse, thread the cable through the port and through the spool's cable head hole. The cable should exit the lever through the casing snout. Andy.
01-18-13, 05:50 PM
#4
Senior Member
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,092 Times
in
723 Posts
You may be able to tease the cable end out by using a pointed object like a dental pick to guide the ball toward the port as you push and wiggle it. Rotating the wire might also help.
Just be glad that you didn't have the cable itself break inside the shifter. This is often a disaster to fix and is a good reason to inspect your cables frequently for fraying and wear.
Just be glad that you didn't have the cable itself break inside the shifter. This is often a disaster to fix and is a good reason to inspect your cables frequently for fraying and wear.
01-18-13, 09:23 PM
#5
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,089
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4206 Post(s)
Liked 3,871 Times
in
2,314 Posts
It is possible that the cable has begun to fray. STI levers (with the exposed gear cables/origonal style) have this possibility. If so the fraying is inside the lever only a few MMs from the end. The broken strands can cause jamming of the cable.
Or the end did come out of the spool but then the cable was pulled and the end got jammed between the spool and the inside of the lever case.
Either way more "working" at the cable and end is the course. If you can see into the lever and spot the end you might be able to discern what's the problem. Compare to the left side maybe. Andy.
Or the end did come out of the spool but then the cable was pulled and the end got jammed between the spool and the inside of the lever case.
Either way more "working" at the cable and end is the course. If you can see into the lever and spot the end you might be able to discern what's the problem. Compare to the left side maybe. Andy.
