A/C System Recharge
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From: Republic of Texas
A/C System Recharge
I'm servicing my AC system this weekend by replacing the compressor, condensor, dryer/receiver, and all O-rings with new components. I plan to use system flush on the evapoator and all lines prior to re-assembly.
After everything is buttoned back up and evacuated, how many ounces of R-134a should the system take. Also, what are the general low-side and high-side gage readings I should see when the system is properly charged?
This is my first extensive AC system service project so not real sure what I should look for on the gages. Any help is appreciated.
Cheers!
JD
After everything is buttoned back up and evacuated, how many ounces of R-134a should the system take. Also, what are the general low-side and high-side gage readings I should see when the system is properly charged?
This is my first extensive AC system service project so not real sure what I should look for on the gages. Any help is appreciated.
Cheers!
JD
Thread Starter
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Senior User
Joined: Jul 2008
Posts: 121
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From: Republic of Texas
Thanks,
JD
Fleet Owner
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From: Kentucky
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From: Coatesville ,PA.
Last year My 92 Nite's R12 A/C was finely starting to fail. The factory FS10 compressor was toast. Noisy bearing and the clutch seal was the cause of my refrigerant leak.
I had the R12 recovered by an older shop that still had some old equipment, I mention this because new shops don't want R12 in their recovery equipment. After that getting done. I bought, "New" Arctic Air compressor , New Suction and liquid lines that come with new O-rings ,New accumulator, 134 orifice tube and service port fittings for 134 and 8oz. ester oil and refrigerant . A/C retro fit included removing Evaporator from firewall to clean fins and flush and I cleaned out the Evaporator case of
( field mice critter condo's
, we live farm country). Then flushed the condenser . I drained the new compressor of all its shipping oil then add 1/3 of refrigerant oil charge and turned the pump by hand to circulate the oil then and split the rest of the oil charge between condenser and evaporator. I use ester oil on retrofits. I set up manifold gauges and Vacuum pump. Pulled vacuum running pump for 45-50min. to boil off any moisture and let sit over night. Gauge readings held, so I added refrigerant watching pressure's and vent temp. At 32psi low side and 185 psi high side I used a little over 2 lbs, My vent temp. is 40 degrees. So I'm happy it went well and is done. And even happier that the Evaporator on the firewall is very easy to get to. I know that a lot of new cars and trucks bury them in the dash . Hope this helps you, '92
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