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  1. #1
    Join Date
    Mar 2009
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    Hmm McQuay oil filter change

    Working on a McQuay centrifugal M# CE063JAP18RDU STYLE# 068368201F ... The oil filter housing seems to be molded into the compressor shell Ther are only two lines leading into the housing ...I close both ,also close both the lines leading from the oil tank and cooler. loosen the oil shell cover and as expected the oil still under pressure foams out. The limited info I can find says the chiller contains a check valve internal to the filter and it should stop the oil foaming and eventually the pressure wil decrease to the point where I can remove the filter. My problem the oil foams out for over ten min.. Anyone ever have the "check valve" fail... Is this normal and is that filter housing open to the compressor and or impeller??

  2. #2
    Join Date
    May 2006
    Location
    N.E. IA
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    519
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    Anyone ever have the "check valve" fail... YUP

    Is this normal ??? NOPE

    is that filter housing open to the compressor and or impeller? NOPE

    Seeing as this is your first posting, If you want any more help than that, your gonna have to tell us about your self..This is an open forum and any body can get on here and ask for information. We wouldn't want anyone to get hurt or worse.
    "Wheel" mechanics work on "Wheel" chillers

  3. #3
    Join Date
    Dec 2015
    Location
    Wash. D.C.
    Posts
    5
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    Anyone have more information on this thread? I'm having the same issue.

  4. #4
    Join Date
    Aug 2000
    Location
    Under my tree
    Posts
    5,069
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    Isolate, hope cv holds, bleed off, change. Go home!!!
    Not much to say, just hanging in my shade tree!!!!

  5. #5
    Join Date
    Dec 2015
    Location
    Wash. D.C.
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    5
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    Thanks absrbrtek.

  6. #6
    Join Date
    Jul 2013
    Location
    New Orleans - Baton Rouge LA
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    47
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    i'm curious why you're changing the filter

  7. #7
    Join Date
    Dec 2015
    Location
    Wash. D.C.
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    5
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    winter work routine maint.

  8. #8
    Join Date
    Apr 2013
    Posts
    16
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    McQuay does not recommend regular oil filter or oil changes unless an oil analysis shows reason to. Make sure the compressor casting heaters are working, there shouldn't be much refrigerant in there to cause foaming if the casting is up to temp.

  9. #9
    Join Date
    Aug 2000
    Location
    Under my tree
    Posts
    5,069
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    Agree, McJunk does not recommend filter changes. Oil analysis is a joke on these. I had one full of water, sample came back as new oil. Had 1 with a ground down impeller, oil came back great. Unless you've got high or low speed wear, the way the sealed oil system is setup, you can get some false reading.
    Quote Originally Posted by acrefertech View Post
    McQuay does not recommend regular oil filter or oil changes unless an oil analysis shows reason to. Make sure the compressor casting heaters are working, there shouldn't be much refrigerant in there to cause foaming if the casting is up to temp.
    Not much to say, just hanging in my shade tree!!!!

  10. Likes RichardL liked this post
  11. #10
    Join Date
    Apr 2013
    Posts
    16
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    That's crazy! I would have to question either how the sample was taken, or even the quality of the lab. We've had to take multiple samples on the same machine because the one of the labs would always come back with inconclusive results.

  12. #11
    Join Date
    Oct 2006
    Location
    Central Texas
    Posts
    711
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    Been down that road too. Your analysis is only as good, as the lab that analyzes it.

  13. #12
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    2,104
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    Quote Originally Posted by baldie View Post
    Working on a McQuay centrifugal M# CE063JAP18RDU STYLE# 068368201F ... The oil filter housing seems to be molded into the compressor shell Ther are only two lines leading into the housing ...I close both ,also close both the lines leading from the oil tank and cooler. loosen the oil shell cover and as expected the oil still under pressure foams out. The limited info I can find says the chiller contains a check valve internal to the filter and it should stop the oil foaming and eventually the pressure wil decrease to the point where I can remove the filter. My problem the oil foams out for over ten min.. Anyone ever have the "check valve" fail... Is this normal and is that filter housing open to the compressor and or impeller??
    Hope this helps.
    Attached Images Attached Images

  14. #13
    Join Date
    Jul 2013
    Location
    New Orleans - Baton Rouge LA
    Posts
    47
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    Or tech that takes it

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