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Thread: O-320-B2B Cylinder Installation

  1. #1
    richas's Avatar
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    Default O-320-B2B Cylinder Installation

    I have sent my jug out for repair and am reviewing the installation procedure. I am confused about this section in the manual (60294-7):

    a. Assemble hold down plates (where applicable)
    and cylinder base hold down nuts. Install shims between
    hold down plates and cylinder barrel as directed in
    figure 6-31.
    b. Tighten 1/2 inch or 7/16 inch hold down nuts to
    300 inch pounds (25 foot pounds) torque.
    c. Remove shims and using the same sequence,
    tighten the 1/2 inch nuts to 600 inch pounds (50 foot
    pounds) torque or the 7/16 inch hold down nuts to 420
    inch pounds (35 foot pounds) torque.
    d. Tighten the 3/8 inch hold down nuts to 300 inch
    pounds (25 foot pounds) torque. Sequence is optional.

    If I place shims between the cylinder and the plates won't they get squeezed when I torque the nuts? How would I get them out? I don't remember a gap between the plates and the cylinder...

    Thanks

    Rich

    IMG_2288.jpg

  2. #2
    richas's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    Ahhhhh, I think I get it. The shims go between the EDGE of the plates and BARREL of the cylinder. Not under the plates between the plates and the flange.

    headslap.

    Rich

  3. #3
    Administrator Steve Pierce's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    Quote Originally Posted by richas View Post
    Ahhhhh, I think I get it. The shims go between the EDGE of the plates and BARREL of the cylinder. Not under the plates between the plates and the flange.

    headslap.

    Rich
    You got it. Never had an issue with it.

  4. #4
    richas's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    Quote Originally Posted by Steve Pierce View Post
    You got it. Never had an issue with it.
    Thanks Steve. Do you normally do the shim thing? I can cut up a feeler gauge I suppose...

    Rich

  5. #5
    Pacerfgoe's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    I think the issue is just make sure the plates are lying flat on the cylinder flange before tightening, not somehow cocked and riding up on the radius between the barrel and the flange when tightening.

  6. #6
    richas's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    Quote Originally Posted by Pacerfgoe View Post
    I think the issue is just make sure the plates are lying flat on the cylinder flange before tightening, not somehow cocked and riding up on the radius between the barrel and the flange when tightening.
    That makes sense.

    Thanks

    Rich

  7. #7
    Administrator Steve Pierce's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    I just make sure I can get a feeler gauge between the plate and cylinder barrel.

  8. #8
    gliderman's Avatar
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    Default Re: O-320-B2B Cylinder Installation

    lycoming service instruction 1029D will be helpful

    Shane-o

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