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  1. #1
    Join Date
    Jun 2009
    Location
    Florida
    Posts
    540

    CVHE rear bearing changeout

    Anybody ever change a centravac rear bearing by bringing the pressure up to zero and doing it on the fly? At Trane we always pulled the charge.
    If I could, that would give me justification to buy a good pressurizer. Sorta kill two birds with one stone.
    Low Pressure Forever!

    If you know heavy metal, you can work anywhere-Dave Andreson

    Anchors Aweigh my boys, Anchors Aweigh!
    Farewell to foreign shores, We sail at break of day. Through our last night on shore, Drink to the foam. Until we meet once more. Here's wishing you a happy voyage home!

  2. #2
    Join Date
    Oct 2006
    Location
    Central Texas
    Posts
    633
    No tail bearings too involved, I've zeroed a machine & pulled oil pump assembly before, pump failing had to have the machine later that day! I've done quite a few 1st stage tang operators.
    Sic Semper Tyrannis.

  3. #3
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,045
    You gotta be F&%#@ing kiddin ??????? and what happens when you pass out from the fumes and fall off the chiller and break your neck !!!!!!!
    It takes a good four hours to swap the bearings using the proper procedures and tools , ie the bearing press. Your not doing a quick switch of a vane operator or oil reg here your talking an extensive repair which takes time and concentration. If you dont use the bearing press I guarantee you will be doing them again 6 months from now because you cannot do the preload properly without it . JMHO
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  4. #4
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609

    Thumbs down

    Quote Originally Posted by ChillerWisperer View Post
    ... Sorta kill two birds with one stone.
    You can sorta kill you and the guy workin' with you, while you're at it.......

    I go back to what I said before in that other thread about the boiler - your boss needs to decide whether he wants to fish or play with the worms. Having a job that calls for a certain tool is justification for buying that tool in this instance. You shouldn't have to consider such a thing as this thread was predicated on just to try and get what you need to work with.

  5. #5
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,045
    Also what happens if something goes wrong and you need to use some heat with torches ?????? Go ahead gas yourself ????? Hope you have lots of insurance .
    I know it may sound harsh but I cant believe you would even consider it ???? Totally dumb idea if you ask me
    Last edited by Healey Nut; 08-28-2009 at 10:14 PM.
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  6. #6
    Join Date
    Dec 2003
    Location
    45th Parallel
    Posts
    954
    Not only is it a bad idea, I am pretty sure it is against EPA Reg.s also.
    If my memory serves me, I think anytime you expose a hole over 2-3 inches, it requires recovering refringerant on low pressure machines.

    Even though enforcement is pretty much non-existent, it is just a bad idea from a safety stand point alone.

  7. #7
    Join Date
    Nov 2008
    Posts
    366
    I don't want to pile on here but depending on the vintage of the machine you will most likely need to solder a line back together.

    I prefer not to solder with gas in the machine.(I am not saying that I have never soldered with gas in the machine but really don't like to)

  8. #8
    Join Date
    Nov 2008
    Posts
    366
    ChillerWisperer,
    I know that it is none of my business but after reading a few post about your current state of employment.

    I have to ask why don't you just come back to work for Trane and quit messing around with these contractors?

  9. #9
    Join Date
    Jun 2006
    Location
    Midwest
    Posts
    284
    Quote Originally Posted by drivewizard View Post
    Not only is it a bad idea, I am pretty sure it is against EPA Reg.s also.
    If my memory serves me, I think anytime you expose a hole over 2-3 inches, it requires recovering refringerant on low pressure machines.

    Even though enforcement is pretty much non-existent, it is just a bad idea from a safety stand point alone.
    This is a true statement.
    It's All Good!!!

  10. #10
    Join Date
    Aug 2000
    Location
    USA
    Posts
    4,990
    ROFLMAO, not all contractors are as screwed up as CW's employer. There are plenty of non factory contractors that are better than the factory. JMHO
    Quote Originally Posted by triggerhappy View Post
    ChillerWisperer,
    I know that it is none of my business but after reading a few post about your current state of employment.

    I have to ask why don't you just come back to work for Trane and quit messing around with these contractors?
    Your poor planning does not constitute an emergency on my part!!!!

  11. #11
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,045
    I have to agree with the other guys if the contractor you work for isnt prepared to come up with the bucks for the proper tools for the job then he sould get the F&%# out of the way and let someone else in there ????
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  12. #12
    Join Date
    Jun 2009
    Location
    Florida
    Posts
    540
    OK OK...geeze guys, I was just asking. I wouldn't have tried it unless someone had done it sucessfully. I've done a few, so I know what's involved. Pulling the gas isn't any big deal, after all.
    Low Pressure Forever!

    If you know heavy metal, you can work anywhere-Dave Andreson

    Anchors Aweigh my boys, Anchors Aweigh!
    Farewell to foreign shores, We sail at break of day. Through our last night on shore, Drink to the foam. Until we meet once more. Here's wishing you a happy voyage home!

  13. #13
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609
    Quote Originally Posted by ChillerWisperer View Post
    OK OK...geeze guys, I was just asking. I wouldn't have tried it unless someone had done it sucessfully. I've done a few, so I know what's involved. Pulling the gas isn't any big deal, after all.
    It is if your boss won't get you a decent low pressure recovery unit.........

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