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  1. #1
    Join Date
    Feb 2008
    Location
    Dubai
    Posts
    89

    Bitzer screw compressor

    Hi friends,

    I have a bitzer screw compressor.model:CSH7571.its winding is grounded. so I have to take out it for rewinding.can anybody help me,how to remove the stator.should I heat the compressor body?please hlp me.

    Moideen-Dubai

  2. #2
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609
    Change the compressor, or take it out, and take it to a motor shop and let them do it.

  3. #3
    Join Date
    Nov 2006
    Location
    North Carolina
    Posts
    130
    Reclaim the gas of course, and then on the motor side of the compressor take the end plate off. There will be a bolt holding the rotor in, take the bolt out, then pull the rotor out. Also pull the terminal strip block up, there will be six or eight hex bolts holding it down, then unwire the wires on the back of the block going to the stator. There is a bolt on the outside of the compressor holding the stator in place, remove this bolt and the stator slides right out. It is kinda heavy so be careful, but it is not near as hard as it sounds. The bitzer screws are the same as the copeland screws. The stator and rotor are field replaceable. You can get the material you need (gaskets and stator) from your local copeland dealer. Then put it back together the same way you took it apart. Good Luck!

  4. #4
    Join Date
    Feb 2008
    Location
    Dubai
    Posts
    89

    Thumbs up bitzer screw

    Quote Originally Posted by chad_nc View Post
    Reclaim the gas of course, and then on the motor side of the compressor take the end plate off. There will be a bolt holding the rotor in, take the bolt out, then pull the rotor out. Also pull the terminal strip block up, there will be six or eight hex bolts holding it down, then unwire the wires on the back of the block going to the stator. There is a bolt on the outside of the compressor holding the stator in place, remove this bolt and the stator slides right out. It is kinda heavy so be careful, but it is not near as hard as it sounds. The bitzer screws are the same as the copeland screws. The stator and rotor are field replaceable. You can get the material you need (gaskets and stator) from your local copeland dealer. Then put it back together the same way you took it apart. Good Luck!
    Very thanks to Chad. Usually I am overhauling the reciprocating compressor.but still didn’t get chance to remove stator from screw compressor. thats why I posted my doubt. Then chad replayed professionally.anothor member klove replayed very unprofessional.
    Anyway again thanks to chad

    moideen

  5. #5
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609
    Quote Originally Posted by moideen View Post
    Very thanks to Chad. Usually I am overhauling the reciprocating compressor.but still didn’t get chance to remove stator from screw compressor. thats why I posted my doubt. Then chad replayed professionally.anothor member klove replayed very unprofessional.
    Anyway again thanks to chad

    moideen
    Friend, your profile says absolutely NOTHING about you or your experience level. Based on the information you gave, I gave you the best and safest advice that I could give. I've pulled quite a few stators in my life. If you have to ask for advice on an internet forum how to accomplish a task such as that, it is probably best to let someone that knows how already either show you how, or do it for you. Either way, hope your repairs go well.

  6. #6
    Join Date
    Nov 2008
    Posts
    360
    Klove,
    I see that I am not the only one getting beat up on this forume.

    These people come on here asking questions that makes it clear that they should just.

    "Step away from the centravac"

    If you are not working for a company that has the resources to provide this sort of information you don't need to be there is the first place.

  7. #7
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609
    Hey T,

    I saw that one where somebody jumped in the middle of you a couple of weeks ago. You handled that very well, by the way ("As a matter of fact, I do overhaul compressors all day.....") . I thought in retrospect that maybe I was a little abrupt with the original answer, but it's hard to get voice inflection into an internet post. The guy asking the question needs to stop and think about what he asked, and a lot of times they don't. But the bottom line is exactly what you just said - there are some things better left alone if no one is there that knows how already.

  8. #8
    Hey,
    There should be no need to remove the center bolt on the male rotor to remove the rotor.The stator is the only parts that needs to be removed unless it is heavilly damaged due to arc splatter. Once upon a time Bitzer(located in Oakwood,Ga) had a pair of machined rods that would aid in the alignment of removing/installation of the stator. There is a metric allen bolt that holds a key inside the compressor near the terminal plate. It can be a real trick to remove the stator due to its close machining. If it cocks in the housing it can be a bear to get unstuck. Also, once the stator is removed rotate the male rotor shaft to ensure that a mechanical failure didnt cause the motor to fail. Bitzer used to send out Rewound stators with all the gaskets needed for the repair.

  9. #9
    Join Date
    Apr 2009
    Location
    Georgia
    Posts
    41
    Quote Originally Posted by Overtime487 View Post
    Hey,
    There should be no need to remove the center bolt on the male rotor to remove the rotor.The stator is the only parts that needs to be removed unless it is heavilly damaged due to arc splatter. Once upon a time Bitzer(located in Oakwood,Ga) had a pair of machined rods that would aid in the alignment of removing/installation of the stator. There is a metric allen bolt that holds a key inside the compressor near the terminal plate. It can be a real trick to remove the stator due to its close machining. If it cocks in the housing it can be a bear to get unstuck. Also, once the stator is removed rotate the male rotor shaft to ensure that a mechanical failure didnt cause the motor to fail. Bitzer used to send out Rewound stators with all the gaskets needed for the repair.
    Isn't Bitzer a German company and are they not used in refrigeration so wouldn't this post really be in the wrong site and Overtime487 I get the overtime but the 487 I don't get do care to explain it's not your birthday is it

  10. #10

    Hmm

    Wrong again,
    Bitzer manufactures compressors for A/C,med, low & ultra low applications. His post was on the CS series of compressors. That is a compact design used on A/C or med temp, so HE posted in the correct forum. Good TRY.Are you the guy selling BTU's (Brooklyn thermal Units) ,can I buy some......

  11. #11

    Cool Bitzer Compressor

    I havent looked into it but I replaced a seal shaft from a motor to the compressor... What would be my steps to align it... I know it has to be percise or else!!!???

  12. #12
    Mr.Chad,As i understand that your above quote and i had problem with same that i replaced new rewound stator but compressor not getting start giving humming noise. i could not understand what went to wroung. it's rewindding problem or.. can advise me plz,

  13. #13
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,386

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