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  1. #1

    Clearing wax from small cap tube on 134A system

    I have a Bev Air prep table that waxed up its second cap tube due to 2 leaks and 2 compressor failures. It was a royal pain to replace the cap on this box and I have heard there is a tool that pumps a piece of lead wire through a cap tube with a bottle jack type thing to clear blockages. If I can get the cap clear would it make sense to size the drier up to a C-052-HH from the C-032 I put in there originally to get the rest of the wax out and change to R414B. By the way, the failed compressor was installed by others and improperly evacuated and the old drier left in so I inherited this mess. I am trying to fix this economically so we don't have to just trash a unit with a new compressor. Is there some chemical cure or some magic that can be done?

  2. #2
    Join Date
    Nov 2005
    Location
    Haymarket VA
    Posts
    642
    Quote Originally Posted by 1ton3800chevy View Post
    I have a Bev Air prep table that waxed up its second cap tube due to 2 leaks and 2 compressor failures. It was a royal pain to replace the cap on this box and I have heard there is a tool that pumps a piece of lead wire through a cap tube with a bottle jack type thing to clear blockages. If I can get the cap clear would it make sense to size the drier up to a C-052-HH from the C-032 I put in there originally to get the rest of the wax out and change to //////////R414B. ////////////////By the way, the failed compressor was installed by others and improperly evacuated and the old drier left in so I inherited this mess. I am trying to fix this economically so we don't have to just trash a unit with a new compressor. Is there some chemical cure or some magic that can be done?
    copeland did not list 414b for there pump

  3. #3
    Join Date
    Feb 2006
    Location
    Phoenix,AZ
    Posts
    2,848
    Quote Originally Posted by 1ton3800chevy View Post
    I have a Bev Air prep table that waxed up its second cap tube due to 2 leaks and 2 compressor failures. It was a royal pain to replace the cap on this box and I have heard there is a tool that pumps a piece of lead wire through a cap tube with a bottle jack type thing to clear blockages. If I can get the cap clear would it make sense to size the drier up to a C-052-HH from the C-032 I put in there originally to get the rest of the wax out and change to R414B. By the way, the failed compressor was installed by others and improperly evacuated and the old drier left in so I inherited this mess. I am trying to fix this economically so we don't have to just trash a unit with a new compressor. Is there some chemical cure or some magic that can be done?
    I think you are talking about the "cap check". I have one but i still haven't used it yet. I did fill it full of POE oil a couple weeks ago but the last restriction i had that cutting a few inches off the tube didn't fix , was a r-22unit. So it's still sitting here unused. Seems like its gonna make a oil mess anyways.

  4. #4
    Join Date
    Jan 2008
    Location
    NE FLA
    Posts
    64
    If the problem is wax, the pig will compact the wax into a solid jam. I have only had success with small pieces of debri being pushed. .03c

  5. #5
    Join Date
    Apr 2008
    Location
    Central CA
    Posts
    566
    Would a Rx-11 flush disolve wax?
    Anyone ever try it.
    Or what about backblowing with nitrogen.
    Just some ideas

  6. #6
    Join Date
    Mar 2006
    Location
    New Zealand
    Posts
    300

    Not wax

    It is my understanding there is no wax in POE oils. Suggest it is Crap from previous poor service work.

  7. #7
    Join Date
    Jun 2008
    Location
    NW Florida
    Posts
    707
    Had a similar problem. Went through about three caps on a reach in freezer. Finally got pi**ed and snatched out cap and replaced with txv and a sight glass. new driers. Unit ran about five more years until the evaporater coil started leaking. Customer ordered new box. Unit was 15 years old anyway.

  8. #8
    Join Date
    Mar 2008
    Location
    North Queensland, Australia
    Posts
    1,051
    Quote Originally Posted by kiwireeferman View Post
    Suggest it is Crap from previous poor service work.
    That's a bit unkind kiwi
    Mistakes are a part of being human. Appreciate your mistakes for what they are: precious life lessons that can only be learned the hard way. Unless it's a fatal mistake, which, at least, others can learn from. Al Franken, "Oh, the Things I Know", 2002

  9. #9
    Join Date
    Jan 2008
    Location
    NE FLA
    Posts
    64
    Quote Originally Posted by meoberry View Post
    Had a similar problem. Went through about three caps on a reach in freezer. Finally got pi**ed and snatched out cap and replaced with txv and a sight glass. new driers. Unit ran about five more years until the evaporater coil started leaking. Customer ordered new box. Unit was 15 years old anyway.
    I did this as well on an old case. Installed an oversized liquid drier in the vertical down flow position, this compensates for no receiver tank. .04c

  10. #10
    when a cap tube plugs in a system with poe oil in it i think its just smarter to change the compressor along with it. 1 reason being the compressor has seen extreme heat and 2 the oil is broken down.

    its a win win for the customer and you

  11. #11
    Join Date
    Mar 2008
    Location
    North Queensland, Australia
    Posts
    1,051
    Quote Originally Posted by refrigekid View Post
    when a cap tube plugs in a system with poe oil in it i think its just smarter to change the compressor along with it. 1 reason being the compressor has seen extreme heat and 2 the oil is broken down.

    its a win win for the customer and you
    kid, you got expensive habits.
    if you're worried about the oil, pull the compressor out, tip out the oil and pour in new stuff
    Mistakes are a part of being human. Appreciate your mistakes for what they are: precious life lessons that can only be learned the hard way. Unless it's a fatal mistake, which, at least, others can learn from. Al Franken, "Oh, the Things I Know", 2002

  12. #12
    Join Date
    Apr 2004
    Location
    Charlotte, NC
    Posts
    648
    Quote Originally Posted by refrigekid View Post
    when a cap tube plugs in a system with poe oil in it i think its just smarter to change the compressor along with it. 1 reason being the compressor has seen extreme heat and 2 the oil is broken down.

    its a win win for the customer and you
    Do you also change the compressor when you have a condenser fan motor failure? What if your condenser it matted closed? These are the same type of issues relating to compressor heating too much. Changing the compressor because of the cap tube is quite silly. Good luck......
    "Fighting Ignorance since 1973 (It’s taking longer than we thought)." The Straight Dope.

  13. #13
    Join Date
    Mar 2006
    Location
    New Zealand
    Posts
    300

    Oil change.

    Quote Originally Posted by ckone180 View Post
    Do you also change the compressor when you have a condenser fan motor failure? What if your condenser it matted closed? These are the same type of issues relating to compressor heating too much. Changing the compressor because of the cap tube is quite silly. Good luck......
    I agree, pretty simple to disconnect compressor and just change the oil.

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