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  1. #27
    Join Date
    Sep 2002
    Posts
    21,575
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    Typically they will run until the piston travel upward gets so exaggerated that the piston hits the valve plate. Not running smooth and not running quiet - but still pumping. <g>

    The store is closed now but I worked on one that was so loud that the store's customers complained and the vibration had broken almost everything about the installation at various times. Probably that one had a piston actually kissing the valve plate the last time I saw it. It was in a store room and the Indian owners piled boxes of product to the ceiling around it. They were forever demanding that I make it run quiet but they were adamant that a "still working" compressor could not be replaced: "don't be ridiculous - just make it more quiet." <g>

    I have some much more funny stories about that Indian family. And some sad ones too unfortunately.

    PHM
    -------


    Quote Originally Posted by stat View Post
    I have seen compressors with what I diagnosed as wrist pin slap run for YEARS. The roof top condenser I am thinking of drove the neighbors CRAZY and it ran for at least 10 years that way. In the short time I did not have the account, someone else changed the compressor.

    Again, I don't actually know that it was wrist pin slap.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  2. #28
    Join Date
    Jun 2006
    Posts
    309
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    An Indian store owner that would not authorize work? Tell me it ain't so!

    Some Indians are among my best customers, others I fired along the way...

  3. Likes VTP99 liked this post
  4. #29
    Join Date
    Aug 2010
    Location
    Dearborn MI
    Posts
    335
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    Quote Originally Posted by Poodle Head Mikey View Post
    Thanks.

    I know how the wrist pin lube collection hole and the 'pumping action' of the wrist pin in it's bore works. From smash-lube engines - but the principle is the same.

    What I never knew / thought about, until you educated me, was that a broken discharge valve constant-loading the piston crown destroys the small-end of the connecting rod by eliminating the load-transfer pumping action. <g>

    It's obvious now that you've detailed it - and I am always delighted to learn new things - but, in my previous ignorance, I had always pointed at wrist pin lube oil collection 'clogging' due to contaminated lube oil as the culprit.

    I thank you!

    PHM
    --------
    My pleasure.

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