Deore LX rear derailleur

John Redman said:

When replacing the B tension screw spring, how do I put the correct tension on.

I take that as meaning: how to adjust the screw (please explain more if you mean something else) :

Shift chain to smallest front chainring and largest rear sprocket. From having the b-tension screw
undone all the way, turn it clockwise until the upper jockey wheel just stops causing significant*
rubbing/jamming against the sprocket.

* Sometimes it is not possible to completely eliminate rubbing in bottom gear. But shortening chain
by a link or two can help if necessary - that is when chain can afford to be shorter (it should
still be long enough for the largest chainring + largest sprocket).

more instructions:

1. sheldonbrown.comderailer adjustment.htmlOpen ↗

2. parktool.comFAQrindx.shtmlOpen ↗
parktool.comFAQchainlength.shtmlOpen ↗

3. shimano-europe.comcyclingOpen ↗

~PB

No, I mean replacing the spring - it requires tensioning by turning the back plate before refitting
the circlip. It looks like a quarter turn as one and a quarter looks ni on impossible.

John R "Pete Biggs" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

John Redman said:

When replacing the B tension screw spring, how do I put the correct tension on.

I take that as meaning: how to adjust the screw (please explain more if you mean something else) :

Shift chain to smallest front chainring and largest rear sprocket. From having the b-tension screw
undone all the way, turn it clockwise until the upper jockey wheel just stops causing significant*
rubbing/jamming against the sprocket.

* Sometimes it is not possible to completely eliminate rubbing in bottom gear. But shortening
chain by a link or two can help if necessary - that is when chain can afford to be shorter (it
should still be long enough for the largest chainring + largest sprocket).

more instructions:

1. sheldonbrown.comderailer adjustment.htmlOpen ↗

2. parktool.comFAQrindx.shtmlOpen ↗
parktool.comFAQchainlength.shtmlOpen ↗

3. shimano-europe.comcyclingOpen ↗

~PB

John Redman said:

No, I mean replacing the spring - it requires tensioning by turning the back plate before
refitting the circlip. It looks like a quarter turn as one and a quarter looks ni on impossible.

If its the spring I am thinking of, that's the only bike maintenance job that I've given up on and
taken the bits to the shop. Even they struggled but managed it eventually.

Tony

--
"If you tell the truth you don't have to remember anything." Mark Twain