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Help with Husky 51 flywheel removal

Discussion in 'Chainsaw' started by Byrdmando, Dec 10, 2012.

  1. Byrdmando

    Byrdmando ArboristSite Operative

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    Can anyone tell me how to remove the flywheel from a Husky 51? Thanks in advance. I have taken the top end off and found that the piston had basically exploded and the pieces of that piston were in the crankcase. I have tried everything I can think of the get this flywheel off

    Any ideas?

    Thanks,

    Byrdmando
     
  2. Cantdog

    Cantdog Tree Freak

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    Husky sells a tool called a flywheel knocker for these little saws.......basically a round piece of steel that threads onto the crank that you whack with a hammer while holding the flywheel......it works very well and costs only a few dollars...you may be able to make one too......
     
  3. Rokon

    Rokon ArboristSite Guru

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    So far a punch has always taken them off for me.

    There are a few videos on the Tube that give tutorials on this subject. :)
     
  4. Jacob J.

    Jacob J. Tree Freak

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    I've just been backing the flywheel nut off to where it's flush with the end of the crank, then holding the whole mess in one hand by the flywheel- and lightly tapping the flywheel nut. I've pulled a couple hundred flywheels that way with no damage to any crank.
     
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  5. trophyhunter

    trophyhunter ArboristSite Guru

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    Jacob does it the same way I do, only I get ahold of the flywheel and use a green piece of oak to tap the crank. They come off easy like that every time.
     
  6. Sprintcar

    Sprintcar Chainsaw Slut

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    +1

    :rock:
     
  7. Byrdmando

    Byrdmando ArboristSite Operative

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    Thanks guys. Got the flywheel off. I am going to start a new thread the newest question I have.

    Feel free to weigh in there as well.

    Byrdmando
     
  8. Fish

    Fish Account Hold

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    So you got the flywheel off after the "top end" was removed???///

    How did that turn out??/?
     
  9. barneyrb

    barneyrb Addicted to ArboristSite

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    Bfh........
     
  10. Fish

    Fish Account Hold

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    bring it!!!
     
  11. Wood Doctor

    Wood Doctor Edwin

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    Yes, this is an old thread, but I thought I would revive it after my recent success. This technique might work on other chain saw models as well. My Husky 51 chewed up a pawl on the flywheel that had to be replaced along with the pull cord and housing. The flywheel has to be removed in order to knock out the rivet holding the pawl from the back side. I first tried Jacob's method in post #4, but holding the saw up by the flywheel was too much for my old left arm and hand.

    I removed the flywheel nut using a pair of metric sockets, #14 for the clutch nut and #13 for the flywheel nut. That being done, I found a flat blade screwdriver, one down from the largest in my set. There is an ideal spot to wedge the screwdriver between the case and the back of the flywheel:
    Husky51Flywheel.jpg Now I tapped the screwdriver with a hammer four or five times (not hard). Then I removed the screwdriver and rotated the flywheel about 60 degrees (1/6 turn) CCW. I inserted it once again and once again tapped it four or five times. I repeated this procedure four times and on the fourth tapping session, the flywheel popped right off.

    The idea is not to use much hammering force at all. The last thing you want to do is crack the flywheel or damage the case. At first you would swear nothing was happening, but in fact, the flywheel is slowly coming loose as you go around. Just be patient. I was, and it paid off.
     
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  12. HarleyT

    HarleyT Tree Freak

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    I save the flywheel nuts off of the Stihl saws, and use them as my "knocker", as they are a flanged nut, and coupled with a deep well socket are perfect for taking off the flywheel. Just thread the nut onto the crank so the top of the crank is flush with the nut, grab the flywheel and lift up the saw, and knock the socket with a hammer with a sensible blow, and the flywheel pops right off.
     
  13. Saw Fixr

    Saw Fixr ArboristSite Member

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    There are a bunch of YouTube videos on chainsaw flywheel removal. Easiest for me, as previously mentioned by others is to use a nail set in the drilled center of the crankshaft. Just lay it on it’s side, and give it some love with a hammer. Never had the need to suspend the saw in the air by the flywheel, handle or anything else.....
     
  14. HarleyT

    HarleyT Tree Freak

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    If you think about it a bit, you will start lifting the saw by the flywheel.
     
  15. HarleyT

    HarleyT Tree Freak

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    If you were trying to remove a bearing stuck on a crank, what/where would you hold onto while hitting the crank?
     
  16. Saw Fixr

    Saw Fixr ArboristSite Member

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    HarleyT
    When I remove a bearing off a crank, I clamp the crankshaft in the vise by the flywheel nut and use a bit of heat, and pry it off. This is for a clam shell.
    On a pro model saw, I’d push the shaft thru the bearing/case half.
    Always open to ideas though....
     
  17. Wood Doctor

    Wood Doctor Edwin

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    One of the reasons I posted this is because the Husky 51 flywheels are getting scarce and that includes several of the flywheel parts as well. Repairing them usually requires removing them. The removable rivets holding the pawls are even getting scarce (note the missing one in my Pic in post #11) because that design was discontinued. However, I guess that's all to be expected these days.

    HarleyT's idea of using a Stihl lug nut and a deep socket intrigues me. I think that you could do this without lifting the saw up by the flywheel. If the socket is somehow tight to the flywheel, a few taps with it in a horizontal position might shake it loose, perhaps rotating the wheel between taps. However, getting that deep socket tight enough to the flywheel might not be feasible. I'll experiment with it.
     
  18. jchipps

    jchipps Arboristsite Member

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    Easiest way I found to remove the flywheel on my 55, which looks to be pretty much identical to a 51, is to remove the coil and that black plastic air dam/tunnel thing.

    Then use a small 2 Jaw puller. (I orient the flywheel so the jaws are pulling against the thick areas on the flywheel)

    Removing the coil and that air tunnel thing makes enough room to use a small 2 jaw puller, and it pops off very easily.

    No hammer or prying necessary.
     
  19. HarleyT

    HarleyT Tree Freak

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    Damn!
    Don't tighten the nut down!
    The goal is to break the hold of the flywheel on the shaft, so one needs to tap the shaft away from the grip of the flywheel taper, tightening the nut down negates that fully!
    Pullers any prying..... Well..........
    Damn...................................
     
  20. HarleyT

    HarleyT Tree Freak

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    I shouldn't complain, as you guys help me sell flywheels........
     

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