A/C Compressor Replacement -Purging System?
pingiii
10-05-2005, 09:01 PM
Hi, I'm going to replace my AC compressor and I understand I need to "flush" the system to remove the old oil and any other contaminants before I install the new parts and recharge the system. How is this done and do I need any special tools to do it? Thanks for the help!
CamaroRS92
10-05-2005, 10:21 PM
remove the compressor, take the liquid line loose at the condensor, remove the accumulator, remove the orifice tube.
Flush the liquid line and evaporator with one quart of dura flush. Then flush the hoses & condensor with another quart of dura flush.
You will need to replace the accumulator and orifice tube with "new" parts dont reuse the old ones. You will also need to get all new "o" rings for all the fittings and the 2 large seals that are on the back of the compressor
You will need to be sure to remove all of the flush from the system before hooking all of the hoses up permanent. (I use compressed dry nitrogen) but i guess compressed air will do if there is no or little moisture in it, and if using air you allow extra evacuation time to boil off the excess moisture (needs to pull down to at least 400 microns to get a completely dry system)
dont forget to add the correct amount of oil to the compressor before installing (enough for the entire system)
To do all of this You will need:
a flush canister with hose and tip.
2 quarts of dura flush
air compressor
a closed top container (5 gal. bucket with a lid)to capture the expelled contaminants, oil , and used flush solution
a hose that will fit over the ac fittings to go to the catch container
Charging gauges & micrometer
vacuum pump that is capable of pulling down to 29.99 inches of Hg
*Caution* dont breath the fumes from the flush or you might find yourself over the rainbow somewhere this stuff will take the place of oxygen
Dont forget that it is illegal to discharge refrigerants to the atmosphere - the EPA will fine you up to $30,000.00 if your caught or if someone turns you in (like a pissed off ex-friend) they will give them a sizeable reward for doing it.
Flush the liquid line and evaporator with one quart of dura flush. Then flush the hoses & condensor with another quart of dura flush.
You will need to replace the accumulator and orifice tube with "new" parts dont reuse the old ones. You will also need to get all new "o" rings for all the fittings and the 2 large seals that are on the back of the compressor
You will need to be sure to remove all of the flush from the system before hooking all of the hoses up permanent. (I use compressed dry nitrogen) but i guess compressed air will do if there is no or little moisture in it, and if using air you allow extra evacuation time to boil off the excess moisture (needs to pull down to at least 400 microns to get a completely dry system)
dont forget to add the correct amount of oil to the compressor before installing (enough for the entire system)
To do all of this You will need:
a flush canister with hose and tip.
2 quarts of dura flush
air compressor
a closed top container (5 gal. bucket with a lid)to capture the expelled contaminants, oil , and used flush solution
a hose that will fit over the ac fittings to go to the catch container
Charging gauges & micrometer
vacuum pump that is capable of pulling down to 29.99 inches of Hg
*Caution* dont breath the fumes from the flush or you might find yourself over the rainbow somewhere this stuff will take the place of oxygen
Dont forget that it is illegal to discharge refrigerants to the atmosphere - the EPA will fine you up to $30,000.00 if your caught or if someone turns you in (like a pissed off ex-friend) they will give them a sizeable reward for doing it.
pingiii
10-06-2005, 05:54 PM
Sounds good. Thanks for the detailed instructions. I really appreciate the help.
Len
Len
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