Dérailleur spring

[The Malcolm]

One of my rear mechs is not returning to the highest gear. All the cables are fresh and tried various combinations of cable tensions and adjustments to the screws. When you nudge the dérailleur over by hand the chain moves into the high gear but will not do it with its own spring.

I put a dérailleur on from another bike and it works fine so I am sure the issue is the spring in the deraileur. There are still replacements available from SJS.
http://www.sjscycles.co.uk/shimano-deor ... prod34531/
Does anyone have experience of whether this will solve the problem. I am torn over whether to try this or just get a new :shock: rear mech.

 

[xerxes]

Re:

Is the derailleur nice and free, ie. the pivots aren't gummed up and stiff. Also, what condition are the jockey wheels in?

The spring you linked to probably wouldn't solve the problem, I would have though that the spring that operates the parallelogram would have more influence on how strongly the derailleur moves outwards, for the high gears.

 

[The Malcolm]

Re:

The pivots are all free and clean and the jockey wheels are very crisp and free running. I agree I think it is more the parallelogram spring that is at fault. They don't seem to be available as a spare.

 

[scottproonly]

Re:

I had this problem years ago and it was solved by putting a washer between the mech and hanger,moving the mech outwards a bit
Kes

 

[xerxes]

Re:

Also, have you tried the limit screw?

 

[scottproonly]

Re:

The OP stated that he had tried the limit screws and that he could move the mech by hand into the highest gear.im pretty sure the problem will be solved by the method I suggested

 

[The Malcolm]

Thanks for the input I will try a washer and see how I get on. I might also try swapping the hanger off one of other bikes which I think is the same size. I'm sure I checked this and it was perfectly straight.

 

[scottproonly]

Re:

Let me know if the washer works!
Kes