Couple of AC questions on my 1980
02-10-2019, 04:15 PM
#1
Advanced
Thread Starter
Couple of AC questions on my 1980
I am in the process of getting my AC going on my 1980 L48. I am replacing all the old components , compressor (bad), condenser, evap core, accumulator and all hoses and hard lines. I intend to use r134 refrigerant and PAG 150 oil. What would be the oil capacity for this system total and how much should I put in what component? My second question is the location of my high and low ports for my gauge hook up. I assume the high port it the one on the high pressure liquid line. I have 3 other ports with caps on them. One is next to the pressure switch on one of the evap core tubes and there are 2 ports with caps on the top of the accumulator. Would one of these be my low side port? If so which one? Thanks for any advice or info you can give. GIL
02-10-2019, 07:59 PM
#2
Burning Brakes
After doing some google time, I saw several references saying eight oz. total. Four in comp, two in evaporator, one in accumulator and one in condenser. I think it may be difficult to get in the cond. because the tubes are so small.
The following users liked this post:
gil7247 (02-11-2019)
02-10-2019, 08:13 PM
#3
6oz. 2 in accumulator, 2 in compressor, 2 in evaporator. I would do 3oz in the comp, and 3 oz in the accumulator, and call it good. Turn comp. by hand a dozen times to distribute the oil.
134A uses 80% of R-12 charge. Use the correct orifice tube for R134A.
Me, I found it ran better on R-12. I have used both, and went back to R-12.
R134a works better with a parallel flow condenser,
134A uses 80% of R-12 charge. Use the correct orifice tube for R134A.
Me, I found it ran better on R-12. I have used both, and went back to R-12.
R134a works better with a parallel flow condenser,
The following users liked this post:
gil7247 (02-11-2019)
02-11-2019, 01:43 AM
#4
Le Mans Master
One of the two ports on the top end of the accumulator is for the low pressure cycling switch. The other is the low side charging port. No idea why you have a 3rd one. The high side port is normally smaller than the others.
The following users liked this post:
gil7247 (02-11-2019)
02-11-2019, 07:29 AM
#5
Advanced
Thread Starter
My evap core has one port with the pressure switch attached and a second port right next to it with a protective cap screwed on to it. The accumulator has a port on each side of where the line from the evap core attaches. I assume one of thse 3 are where the low side gauge fitting is attached. That's then one I'm confused on.
02-11-2019, 07:42 AM
#6
Advanced
Thread Starter
6oz. 2 in accumulator, 2 in compressor, 2 in evaporator. I would do 3oz in the comp, and 3 oz in the accumulator, and call it good. Turn comp. by hand a dozen times to distribute the oil.
134A uses 80% of R-12 charge. Use the correct orifice tube for R134A.
Me, I found it ran better on R-12. I have used both, and went back to R-12.
R134a works better with a parallel flow condenser,
134A uses 80% of R-12 charge. Use the correct orifice tube for R134A.
Me, I found it ran better on R-12. I have used both, and went back to R-12.
R134a works better with a parallel flow condenser,
02-11-2019, 08:37 AM
#8
My evap core has one port with the pressure switch attached and a second port right next to it with a protective cap screwed on to it. The accumulator has a port on each side of where the line from the evap core attaches. I assume one of thse 3 are where the low side gauge fitting is attached. That's then one I'm confused on.
The following users liked this post:
gil7247 (02-11-2019)