Deore M591 Rear Derallieur Issue

theblarney
theblarney Posts: 102
edited November 2012 in MTB workshop & tech
Hi,

I have just replaced my derallieur with a new Shimano M591 rear and it seems to of gone fairly smoothly apart from when the chain is at full stretch (low gear at the back, high gear at the front) the chain seems to catch a little on the tension pulley.

I know you are not supposed to be using the gears in this way but wondered if there was a screw or something that can be adjusted to help this?

This is the first time I have changed my derallieur so a bit green to this all

Any advice would be appreciated.

Thanks

Gavin

Comments

  • nicklouse
    nicklouse Posts: 50,673
    nope, if you have not changed anything else and you have got the correct mech.

    just dont use those gears.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • theblarney
    theblarney Posts: 102
    nicklouse wrote:
    nope, if you have not changed anything else and you have got the correct mech.

    just dont use those gears.
    I believe I do have the correct mech, but its a bit confusing.
  • Chunkers1980
    Chunkers1980 Posts: 8,035
    Did you read Park Tools website for guidance?
  • nicklouse
    nicklouse Posts: 50,673
    theblarney wrote:
    nicklouse wrote:
    nope, if you have not changed anything else and you have got the correct mech.

    just dont use those gears.
    I believe I do have the correct mech, but its a bit confusing.

    what was on there? and what version do you have now?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • theblarney
    theblarney Posts: 102
    nicklouse wrote:
    theblarney wrote:
    nicklouse wrote:
    nope, if you have not changed anything else and you have got the correct mech.

    just dont use those gears.
    I believe I do have the correct mech, but its a bit confusing.

    what was on there? and what version do you have now?
    It was a shimano acera and now it's a deore m591 on a Scott aspect 40.
  • The Rookie
    The Rookie Posts: 27,812
    Short or long cage?
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • theblarney
    theblarney Posts: 102
    The Beginner wrote:
    Short or long cage?
    Long cage
  • nicklouse
    nicklouse Posts: 50,673
    and the cassette is?

    have you set the B screw?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • theblarney
    theblarney Posts: 102
    nicklouse wrote:
    and the cassette is?

    have you set the B screw?
    Shimano HG31 11-32 tooth 8-speed?

    Strangely enough I am just on YouTube at the moment seeing what the b-tension screw does and if it will help
  • nicklouse
    nicklouse Posts: 50,673
    read parktools.

    that actually gives step by step info.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • theblarney
    theblarney Posts: 102
    nicklouse wrote:
    read parktools.

    that actually gives step by step info.
    Perfect nick thanks, looks like this could do the trick, I'll give it a go later.

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