Removing an Inboard Clutch on a STIHL Chain Saw

Discussion in 'Workshop and Home Improvement' started by D'Animal, Oct 14, 2008.

  1. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is the procedure to remove the Clutch assy on a STIHL Chain Saw equiped with an Inboard Clutch. This means the clutch is under the sprocket drum and you have to remove the sprocket drum first.

    I will cover the outboard sprocket later in this thread.

    You will have to remove the clutch to do almost any oiler diagnosis or repair on a STIHL.


    This procedure is used on the following models.

    017
    MS170
    018
    MS180
    021
    MS210
    023
    MS230
    024
    MS240 (for the people outside the USA)
    025
    MS250
    026
    MS260
    MS270
    028
    MS280
    034
    036
    MS360
    038
    042
    044
    MS440
    MS441
    046
    MS460
    064
    066
    MS660
    084
    088
    MS880


    All you really need is your Bar Wrench.
     
  2. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Remove your bar and chain by taking off the side cover.
    DSCF4406.JPG DSCF4407.JPG
     
  3. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Remove the clip and washer, drive sprocket rim and/or drum .

    If you have crap wrapped around the crankshaft, the clip may be difficult to remove.


    Once you remove the sprocket drum, you will be looking at the clutch assembly.
    DSCF4421.JPG DSCF4422.JPG
     
  4. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is where most people truely fawk up. Remove the sprak plug. You can use you bar wrench for this. The bar nuts for the models listed above and the spark plug are both 19mm. They engineered this way.


    Do Not use an impact gun!



    Repeat, Do Not use an impact gun!



    You can shear the flywheel key off. A new flywheel is not cheap.

    Here is a picture of the correct piston stop used to stop the piston. Part # 0000 893 5903. It comes with the MS200 and the MS660 model saws.


    Also is a picture of the piston stop correctly installed.

    You will see people telling you to shove rope down the spark plug hole. Don't do this. Please see next post for more info.
    DSCF4409.JPG DSCF4410.JPG DSCF4411.JPG
     
  5. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is the correct piston stop installed. I used a Cut-A-Way Saw that I built a few years back. You can see how the top of the piston comes in contact with the dome of the cylinder.


    The Red color you are seeing is the Cut A Way part.
    DSCF4414.JPG DSCF4413.JPG
     
  6. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is where people really cause themselves a lot of grief.

    They pull the started rope out and double it up.

    They then shove it down the sparkplug hole.

    This sounds simple but it can co$t you big time.
    DSCF4415.JPG DSCF4416.JPG DSCF4417.JPG
     
  7. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is where the starter rope trick can cost you.


    If you shove too much in and the piston is not in the correct spot, it will stick out the exhaust port.

    The piston is a piston. It is not a starter rope shear. If it extends out the exhaust post you can crack the piston between the top of the piston and the top ring. You will not notice this at all. When you runt he saw next, that little piece will break off and score the cylinder and piston.


    Here is a picture of too much. The blue is the the exhaust port.
    DSCF4419.JPG
     
  8. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is the proper way the starter rope should lay in the combustion chamber to lock the piston and stop the crankshaft from turning.
    DSCF4420.JPG
     
  9. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Now that the crankshaft has stopped moving, you can remove the clutch.


    It comes off too the right. Look at my finger.

    Righty Loosy, Lefty Tighty on the clutch.
    DSCF4424.JPG
     
  10. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    Here is the clutch removed. You will be looking at the clutch assy.


    Some will have a washer under the clutch, some will not.
    DSCF4425.JPG
     
  11. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    From here the repair procedure takes a different dirction, depending on the model of saw.


    I will post up different repair models as requested.
     

  12. nortryder

    nortryder

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    oiler repair on a 023 and an 025?
    Thanx
     
  13. nortryder

    nortryder

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    Oh, I see, the info I need is on the 1st page. Duh! I guess I should read 1st, then ask. Thanx again
     
  14. alohman

    alohman

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    Thanks for the detailed post with all the photos. I had no idea how to get that clutch off, but your post made it a 5 minute job.
     
  15. Dave-T

    Dave-T

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    Is there anything particularly evil about this piston stop?

    [​IMG]
     
  16. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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    In the saws list above, YES it is the Debil!


    Look at the picture in Post #8. The steel piston stop that you ahve shown would go in at an angle. When you try to unscrew the clutch it pushes on the threads at an angle. You will feel a slight tight spot right before the clutch comes loos. That slight tight spot is the threads being ripped out of the cylinder by the leverage you put on them using a steel piston stop at an angle.


    Post #6 in this thread shows the piston to cylinder configuration that the metal piston stop is designed for. It screws straight into the cylinder and not at an angle.

    http://forum.ih8mud.com/workshop-ho...ngine-rebuild-009-010-011-012-chain-saws.html
     
    Last edited: Feb 17, 2009
  17. brwnj60

    brwnj60

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    I just acquired an MS290...different than above ???
     
  18. D'Animal

    D'Animal Rescuer of Beagle and Landcruisers Moderator

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  19. brwnj60

    brwnj60

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  20. legalese77

    legalese77

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    I have an MS460.

    I've disassembled it, cleaned it, emptied and cleaned the bar oil tank and pickup element and it's still not oiling. :mad:

    Once I get the clutch off, what next? :confused:

    Any help is greatly appreciated!
     

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