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Husqvarna 576 Repair Thread.

Discussion in 'Chainsaws' started by Onan18, Jul 4, 2018.

  1. Onan18

    Onan18 OPE Sponsor

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    Had a high hour 576 come in with a blown piston and cylinder, I have had several people ask questions about this model recently so the timing couldn't have been more perfect. I will try to cover everything as detailed as possible but I am sure I will forget things so please feel free to add.

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    The Victim.

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    A few standard tools.

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    And a few not so standard, for anybody wondering the @Mattyo crank took is worth every penny.
     
  2. Onan18

    Onan18 OPE Sponsor

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    20180619_132849.jpg
    Four clips hold the top cover on, two on the starter side...

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    And two on the clutch side.

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    Release them and the top cover lifts off.

    20180619_133114.jpg
    You can use the top cover as a tray to hold the hardware.
     
  3. Onan18

    Onan18 OPE Sponsor

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    20180619_133123.jpg
    Two 13mm nuts hold the clutch cover on.

    20180619_133158.jpg
    Note the chain tensioner is built into the clutch cover on this model.
     
  4. Onan18

    Onan18 OPE Sponsor

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    20180619_133206.jpg
    Air filter is held on with a thumb screw.

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    Pretty basic looking, right?

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    Well...

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    Not so much, this is a Strato Charged saw. More on that later.
     
  5. Onan18

    Onan18 OPE Sponsor

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    20180619_133245.jpg
    Let's get the starter off.

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    Typical for Husqvarna, 4mm allen.

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    Starter assembly lifts off, note how the air deflector snaps into the starter housing.

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    Down to the flywheel, no extra wires, this is a standard carb 576.
     
  6. Onan18

    Onan18 OPE Sponsor

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    20180619_133357.jpg
    Let's get the front handle off, three screws on the side...

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    And two on the bottom.

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    Handle off.

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    One nice touch on this model is the handle screws are all the same length, so you can't mess them up.
     
  7. Onan18

    Onan18 OPE Sponsor

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    20180619_133553.jpg
    Bar pad plate is held on with a single Phillips head screw.

    20180619_133628.jpg
    It needs to come off...

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    So you can access the screws that hold the brake cover on.

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    Remove the four Phillips head screws from the cover.

    20180619_133725.jpg
    And get it out of the way.
     
  8. Onan18

    Onan18 OPE Sponsor

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    20180619_134044.jpg
    With the cover off we can start disassembly of the brake mechanism.

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    Remove the detent.

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    And the cam.

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    Use caution when removing the main spring, it is under more tension than any other model saw I have ever had apart. I personally recommend a full face shield when removing and installing it but at a bare minimum safety glasses are a must!!!
     
  9. Onan18

    Onan18 OPE Sponsor

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    20180619_141719.jpg
    Two 4mm screws hold the brake flag on, one on the clutch side.

    20180619_141737.jpg
    And one on the starter side.

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    Flag off.

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    Be sure not to lose the bushings.
     
  10. Dub11

    Dub11 Some body poisoned the watering hole!

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    Joe it's a beer drinking day. Forget these saws.
     
  11. Onan18

    Onan18 OPE Sponsor

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    Let's work on getting the clutch drum off now.

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    First remove the e clip.

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    Then the washer.

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    Hey @huskihl I found that 6 toof rim you were looking for.

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    Next lift the drum off.

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    And the bearing.
     
  12. Tpagel

    Tpagel Pinnacle OPE Member

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    Subbed I got one needing rebuilt.
    Thanks Joe!

    Sent from my SM-J327V using Tapatalk
     
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  13. Onan18

    Onan18 OPE Sponsor

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    20180619_141952.jpg
    With the drum off we can lift the brake band out.

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    Custom clutch removal tool.

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    Clutch off.

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    Wind the worm gear out.

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    And lift off the spacer.
     
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  14. Onan18

    Onan18 OPE Sponsor

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    20180619_142232.jpg
    Remove the 13mm nut.

    20180619_142314.jpg
    Lift up on the flywheel, a good sharp tap with a brass hammer to the end of the crankshaft will pop it loose.

    20180619_142320.jpg
    Key is cast in, can't lose it.
     
  15. AlfA01

    AlfA01 All Thriller, No Filler

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    That one has gotten sun tanned and stuff. Cool thread, but I have to agree with @Dub11 ...it's beer drinking day. Trow that saw in box and fire up the BBQ! :)
     
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  16. Onan18

    Onan18 OPE Sponsor

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    20180619_142341.jpg
    Let's get the ignition off, disconnect the plug wire.

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    Remove the short circuit wire...

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    Two 4mm screws.

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    And the coil lifts out.

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    They are RPM limited to 13,300 but I like to set them between 12,800 and 12,900.
     
  17. Onan18

    Onan18 OPE Sponsor

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    Putting ribs on the smoker as we speak. ;)
     
  18. Onan18

    Onan18 OPE Sponsor

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    This saw was back together and killing trees several weeks ago, just now have time to post the thread.
     
  19. Onan18

    Onan18 OPE Sponsor

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    Now onto the intake, as previously stated this is a Strato saw so there are two throttle butterflies, one for the charge and one for the clean air that purges the exhaust. That being said it is really no more complicated than an ordinary saw.

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    A look down the barrel.

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    To disconnect the throttle start by depressing the trigger.

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    The throttle arm will pull back like so.

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    Hold it open and release the trigger.

    20180619_142642.jpg
    And the cable will come out.
     
  20. Onan18

    Onan18 OPE Sponsor

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    20180619_142651.jpg
    Pull down on the cable...

    20180619_142653.jpg
    And it is free of the holder.
     
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