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Thread: Check Part to Insure Piston does not Seize

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  1. #1
    Join Date
    Oct 2000
    Location
    Chicago
    Posts
    5,955

    Check Part to Insure Piston does not Seize

    ShoeBox Owners,

    We now know that the spacer tube on the upper shaft had too tight a tolerance and that's what is causing these compressor seize ups. There was some variation in them going from loose and sliding easily, to tight but still sliding. If your worried about your compressor suddenly quitting one day, then it would be a good idea to check this spacer tube now before issues come up.

    If you look at the exploded view diagram, its part #7. Remove the upper cylinder, unscrew the hollow set screw (#11) and then you should be able to hook the spacer and pull it out. Check to see if it slides easily on the piston shaft. If it does then great, reassemble and your done. If it seems pretty tight, let me know here and we will send you out a replacement.

    Thanks for all your cooperation on this.

    Tom

  2. #2
    Join Date
    Jun 2010
    Location
    In the Box shop
    Posts
    41
    One other thing to note when you reassemble. Number 1 and 11 hollow set screws should only be put back in finger tight, don't torque them in.

  3. #3
    Quote Originally Posted by AGD
    "Remove the upper cylinder"
    hi tom

    have instructions previously been provided on removing the cylinder or should it be self-evident?

    thanks.

  4. #4
    Join Date
    Jun 2010
    Location
    In the Box shop
    Posts
    41
    Quote Originally Posted by joeyt
    hi tom

    have instructions previously been provided on removing the cylinder or should it be self-evident?

    thanks.
    http://www.automags.org/forums/showthread.php?t=252207

    Quote Originally Posted by AGD
    All,

    I have made small videos on chain tensioning, cylinder removal and mechanical check and lube. Check them out here:
    http://www.youtube.com/user/tomkaye123

    Tom

  5. #5
    Quote Originally Posted by ShoeBox Tech
    oops. thanks for re-posting.

  6. #6
    Join Date
    Jul 2008
    Location
    Minneapolis
    Posts
    115
    So I've got the seized upper piston. What's the procedure from here?

  7. #7
    Join Date
    Oct 2000
    Location
    Chicago
    Posts
    5,955
    Meaning you have it off or what?

    Tom

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