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Weird Issue with Stihl KM Products

Discussion in 'Hand Held Equipment and Tools' started by Sam R, Nov 7, 2018.

  1. Sam R

    Sam R 8mm Socket

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    I'm stumped. I've seen this issue in 2 KombiMotor machines - one brand new the other quite old.

    Essentially what's been allowed to happen is that the driveshaft slips just a couple mills out of the clutch drum and the end result is that the attachment doesn't work.

    I spent a lot of time on the KM90 this afternoon trying to figure it out but couldn't come up with a solution that solved it.

    Has anyone seen this and if so how did you fix it?

    Thanks
     
  2. CR888

    CR888 Addicted to ArboristSite

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    Are the coupling/joining parts sitting on the shaft where they should be? If they are forward it may prevent proper mating of the shafts.
     
  3. Sam R

    Sam R 8mm Socket

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    My assumption is that they are somehow able to move outside of specified tolerances. From looking at it, it seems Stihl wanted the shaft to be able to disconnect from the drum when there's no attachment connected but that the connected attachment should push the driveshaft up into the drum to form a solid connection.
    While it does go up in there and make a good connection it is also able to slip out with an attachment meaning it won't turn.
     

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