Shifter and Deraileur problems
#1
Newbie
Thread Starter
Join Date: Apr 2013
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Shifter and Deraileur problems
I have a quest vanquish and the rear deraileur isnt shifting properly.
it will go to the largest cog when its only shifter into 4th
it shifts from 7 to 6 fine, 6 to 5 fine, skips right to 3 then, skips to 1.
Ive tried putting a new shifter on but it didnt change anything, i cant shift past 4th
the derlaileur isnt bent nor is the hanger.
any help PLEASE? =)
it will go to the largest cog when its only shifter into 4th
it shifts from 7 to 6 fine, 6 to 5 fine, skips right to 3 then, skips to 1.
Ive tried putting a new shifter on but it didnt change anything, i cant shift past 4th
the derlaileur isnt bent nor is the hanger.
any help PLEASE? =)
#2
Senior Member
Join Date: Mar 2013
Location: NW UK
Posts: 418
Bikes: 1992 Marin Eldridge Grade, 2007 Kona PHD and 199? Trek 1000 (current build project)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Did you try configuring it properly, or did you just put a new shifter on without first checking cable tension/H&L stops etc.?
Everything you need to perform an RD tune-up you can find here.
Everything you need to perform an RD tune-up you can find here.
#3
Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,194
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1565 Post(s)
Liked 1,296 Times
in
866 Posts
I might add that I commonly find "adjusted" shifting systems where the shifter hits low gear with the chain still in the middle of the cog stack.
Some serious cable-tensioning MIGHT fix it.
Also, note that the exact routing/placement of the inner wire (cable) at the anchor bolt (pinch bolt) can affect the ACTUATION RATIO of the derailer, and thus must be exactly as intended (in the groove) for the indexing to move accurately in response to the shift lever's movement.
Also check for smooth movement of the cable. Tug on the exposed length of cable running alongside the frame tube. The cable should move and recover it's tension as you let go of it. The action should be smooth and friction-free.
Some serious cable-tensioning MIGHT fix it.
Also, note that the exact routing/placement of the inner wire (cable) at the anchor bolt (pinch bolt) can affect the ACTUATION RATIO of the derailer, and thus must be exactly as intended (in the groove) for the indexing to move accurately in response to the shift lever's movement.
Also check for smooth movement of the cable. Tug on the exposed length of cable running alongside the frame tube. The cable should move and recover it's tension as you let go of it. The action should be smooth and friction-free.
#4
Senior Member
Join Date: Jun 2011
Location: Sunnyvale, California
Posts: 1,180
Bikes: Bridgestone RB-1, 600, T700, MB-6 w/ Dirt Drops, MB-Zip, Bianchi Limited, Nashbar Hounder
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Always start with cable unattached, tension adjuster barrel screwed all the way in and then back out 1/2 to 1 turn at the most and the shifter in high gear. Turn the crank and make sure the chain is on the small cog. Now attach the cable and with finger tension on the cable, tighten the cable pinch bolt on the RD. Shift one click on the shifter, and then adjust the tension barrel out until the chain shifts to the 2nd smallest cog. Now test and shift through all the gears. And when the shifting works, shift back to the smallest cog (highest gear) and make adjustments to the stop screw if necessary. Repeat this stop screw adjustment after shifting to the lowest gear (biggest cog).
#5
Mechanic/Tourist
Please either take more time initially or use Edit Post to correct spelling, typos, capitalization, etc. We put much effort into crafting a clear answer, and it helps us in doing so if your question is clear and not difficult to read.
Thank you.