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Does anyone know how to remove clutch from Makita DCS 6421?

Discussion in 'Arborist 101' started by Jack Smith, Oct 23, 2018.

  1. Jack Smith

    Jack Smith ArboristSite Lurker

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    This is my first chainsaw and I need to replace the clutch because the chain slowly moves when at idle. However, I have been unable to find any instructions on how to do this.

    Any tips would be greatly appreciated.

    Thanks.

    This is a link to a picture of the chainsaw showing the clutch.

    https://photos.app.goo.gl/UB4bP3mUmWEJmyL6A
     
  2. Need2Saw

    Need2Saw ArboristSite Operative

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    IMG_6410.PNG
    You need to buy or make a clutch removal tool and use a piston stop.
     
  3. old CB

    old CB ArboristSite Operative

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    Hold on a minute. If the chain creeps at idle, it may be nothing more than your idle is set too high. Before you monkey with your clutch, which is unlikely to have failed, try turning down your idle screw.
     
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  4. old CB

    old CB ArboristSite Operative

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    Just looked at the photo, and your clutch shows no visible sign of failure. (What's the other clutch doing in there?)

    Back your idle screw out a bit and maybe the chain will rest at idle as it should.
     
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  5. Jack Smith

    Jack Smith ArboristSite Lurker

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    Thanks. If I recall correctly, we tried the adjustment screw where I bought it (used) but we couldn't get it to stop moving. The new clutch is pictured next to the old one. Just thought I'd toss that in picture.

    Ok, I'll have to find out what a piston stop is :) But first, do you know which way I should turn the clutch removal tool?
     
  6. DavdH

    DavdH ArboristSite Operative

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    Piston stop can be starter rope stuffed in the spark plug hole
     
  7. old CB

    old CB ArboristSite Operative

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    Your clutch is reverse thread. To remove it, you drive it clockwise.

    For a piston stop, remove the spark plug and insert a piece of rope. Usually this will work.
     
  8. Jack Smith

    Jack Smith ArboristSite Lurker

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    Thanks guys .This great. I your appreciate your help.
     
  9. Little Al

    Little Al Addicted to ArboristSite

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    Suggest you don't use a metal piston stop rope down the plug hole is is less likely to cause damage clutch thread is left hand unscrewed clockwise before removing old clutch try swapping the springs off new unit to the fitted one
     
  10. BC WetCoast

    BC WetCoast Addicted to ArboristSite

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    If your clutch springs are broken or weak, they can engage the clutch at a lower rpm than normal. Try popping off one of the clutch springs to make removal easier. I've only done it on a stihl so not sure if that works for the Makita
     
  11. Jack Smith

    Jack Smith ArboristSite Lurker

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    Hi Guys, I just wanted to come back and ask how people make their own tool with a socket. How do people cut through the metal to make the notches?

    It seems like the socket is made of steel?
     
  12. Jack Smith

    Jack Smith ArboristSite Lurker

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    An angle grinder! That's how I made the removal tool from a socket. I borrowed a small one and it worked great.
     
  13. blades

    blades Addicted to ArboristSite

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    Angle grinder, dremel tool ( or copy there of) , Piece of hacksaw blade and files and a lot of patience, Bench grinder and files- lot of ways to skin a cat( don't care about PETA) or drill press and a end mill , drill press and spindle with a small grinding stone on it, and of course the mother of all drill or mill drill units a knee mill., piece of flat steel or angel iron drill a couple holes nuts and bolts. . piston stop -piece of nylon rod threaded into spark plug hole- I always make sure I have the piston up top with a small wooden dowel before i do this though.
     
  14. ATH

    ATH Addicted to ArboristSite

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    I had made one out of black pipe several years ago...if I recall correctly, I think I used a hacksaw or more likely an angle grinder.

    Did replacing the clutch fix the problem?

    If not...did you clean it out really well first? Perhaps come gunk was in there causing it to engage at low RPM?
     

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