CVHE rear bearing changeout

[ChillerWisperer]

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.

[txhvac]

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.

[Healey Nut]

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

[klove]

... 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.

[Healey Nut]

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

[drivewizard]

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.

[triggerhappy]

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)

[triggerhappy]

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?

[jimbob73]

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.

[absrbrtek]

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

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?

[Healey Nut]

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 ????

[ChillerWisperer]

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.

[klove]

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.........