Bicycle TutorBicycle Tutor

Show off your bike!

Post Reply 

On the freewheel the chain jumps

Related video tutorials:
Author Message
kevntn Offline
New Member
*****


Posts: 1
Joined: Jun 2009
Post: #1
 
When I shift the rear derailler to any gear the chain jumps back and forth between two gears. It doesn't matter which gear I'm in, whichever one I shift to, the chain jumps back and forth between that gear and the next lower one ( or alternately, it may be between the gear chosen and the next higher one). I have tried all of the adjustments but nothing seems to help.
It's a Shimano Deore XT rear derailler. It doesn't have the barrel adjustment at the derailler. I tried adjusting the cable tension by loosening the clamp and using a pair of needle nose pliers to tug on the cable but I'm not sure that did in fact increase the tension.
Jun 16, 2009 11:33 AM
Find all posts by this user Quote this message in a reply
DaveM Offline
Senior Member
*****


Posts: 568
Joined: Aug 2008
Post: #2
 
It sounds like you need a small adjustment on the cable tension which is very tough to get right without a barrel adjuster. Is there an adjuster where the cable goes into the shifter? Sometimes they put one there too. Was the derailleur made without an adjuster or is it missing. It is odd there isn't one there.
Jun 17, 2009 05:39 PM
Visit this user's website Find all posts by this user Quote this message in a reply
awmeat Offline
Member
*****


Posts: 10
Joined: Apr 2009
Post: #3
 
It sounds like the XT der is one of the new 'shadow' versions. They don't have a barrel adjuster or a big loop of cable housing where the cable meets the der.
Questions:
Is the chain flip-flopping between the gear you're in and the next highest (smaller) sprocket?
Or is it flip-flopping between the gear you're in and the next lowest (bigger) sprocket?
If you answered yes to the first, that means that the tension of the cable is too slack. Make it tighter.
If you answered yes to the second, it means that the tension is too high. Back it off a little.
Cheers.
Jul 1, 2009 08:52 PM
Find all posts by this user Quote this message in a reply
awmeat Offline
Member
*****


Posts: 10
Joined: Apr 2009
Post: #4
 
By the by, unless it's a really old one, it probably not a freewheel. It's a freehub body that has a cassette on it. Just FYI.
Jul 1, 2009 08:54 PM
Find all posts by this user Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Chain jammed behind gear block jamiesandford 1 23 Today 01:26 PM
Last Post: Joe_W
  Chain or derailleur problem! alireza 0 241 Aug 23, 2010 07:25 AM
Last Post: alireza
  Replace a Chain ring from 50T to 52 T macaw 4 439 Aug 9, 2010 09:02 AM
Last Post: macaw
  Alternative way to remove freewheel? viet_Cong 2 430 Aug 5, 2010 02:11 AM
Last Post: Joe_W
  How to remove a Shimano 7 Speed Screw on Freewheel ? pippobaudo 1 342 Aug 4, 2010 01:53 PM
Last Post: Bill
  Fixed to Freewheel? bklynben 2 256 Aug 4, 2010 01:38 AM
Last Post: trevgbb
  Chain slipping under high tourqe Holdsworth 3 661 Aug 3, 2010 10:34 AM
Last Post: xerxes
  Suntour Mountech Freewheel Miyata 610 Frank Fallon 3 260 Aug 3, 2010 01:36 AM
Last Post: Joe_W
  Never need to replace cassette if chain is replaced regularly? cride 2 736 Jul 25, 2010 09:09 PM
Last Post: cride
  OUCH! chain slip after new cassette/chain install chwoodiv 5 959 Jul 21, 2010 06:46 PM
Last Post: chwoodiv

Forum Jump:


RSS Forum RSS Feeds / Powered by MyBB

ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy

feed