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  1. #1
    Join Date
    Sep 2011
    Location
    Northwest Louisiana
    Posts
    280

    York YK vanes sticking?

    Customer complained that vanes not opening. Found control shaft had galled against prv control shaft cover plate? Replaced shaft(new square end model) torgued to specs, pulled compressor bearing housing back to check vane operation and all looked good. Reassembled and placed back in service. 1 week later after sitting idle it started dragging again. Loosen up the 2 bolts securing shaft cover plate and vanes stopped dragging. Model YDHA90 compressor. Any one seen any service letters on this problem?
    A LITTLE BIT OF STUPID GOES A LONG WAY!

  2. #2
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
    Posts
    1,612

    PRV

    Not sure if this will help you but its worth looking into.
    Attached Files Attached Files
    Arguing with your Boss is like wrestling with a pig in
    mud.
    After a while you realize that while you are getting
    dirty, the pig is actually enjoying it.

    It is not exactly cheating, I prefer to consider it
    creative problem solving.

    25 years ago we had Bob Hope , Steve Jobs , and Johnny Cash today we have no Hope no Jobs and no Cash !
    I can fix broke but i can't fix stupid !

  3. #3
    Join Date
    Mar 2011
    Location
    Texas
    Posts
    79
    I remember on some of the small YK's and on the 2000+'s. The vane actuator would travel beyond the allowable geometry and this would cause the vanes to lock up. Then the machine would not start because the vane arm closed end switch was open.
    Good luck.
    Cash for Chillers
    Chillers for Cash

  4. #4
    Join Date
    Mar 2011
    Location
    Texas
    Posts
    79
    Just to clarify, The machine sitting for a week, I dont think that caused anything. I am assuming the customer tried to start the machine and the vanes stroked and locked up.
    Cash for Chillers
    Chillers for Cash

  5. #5
    Join Date
    Sep 2011
    Location
    Northwest Louisiana
    Posts
    280
    I was not aware of the vane modification, thanks for the bulletin, I am 99% certain however that this is what the JCI office installed last year when they pulled the entire compressor and sent to their shop. i will get customer to enquire if that is the case. Thanks again!
    A LITTLE BIT OF STUPID GOES A LONG WAY!

  6. #6
    Join Date
    Sep 2011
    Location
    Northwest Louisiana
    Posts
    280
    CFC Mafia, No it would start up, however the vane motor couldnt move vanes, a little "tapping" got it moving, then I loosen up the 9/16ths bolts on shaft cover plate. Problem so far has not reoccured but doubt if problem is solved.
    A LITTLE BIT OF STUPID GOES A LONG WAY!

  7. #7
    Join Date
    Sep 2011
    Posts
    25
    Was it torqued properly? The lever should be put midway and the cover plate cap screw tightened to 35 ft/lb to keep it all turning evenly. If not it could keep binding up like that.

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