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WoodTruck · 06-14-2018, 06:37 PM

I got everything at Oreilly’s. Prices were comparable to rock auto and I didn’t have to pay shipping.

New Murray R4 compressor
AC line (both hoses are made together on the compressor side)
Murray accumulator.

The old accumulator had a J tube built in that I had to buy a separate piece for, but from what I understand there are different styles.
R134A cycle switch.
Murray orifice tube
Pag150 oil

I would recommend replacing the high side schrader valve before you start, mine leaked after I got it charged the first time.

There’s an O ring on the top side of the accumulator, bottom side, J tube to low side hose. At the compressor, o ring for the high side at the compressor, o ring at the condensor, o ring out of the condensor, o ring at the orifice tube.

The flush I used was in an aerosol can, it’s nasty stuff. Spray it into the top of the evaporator and drain into a container at the bottom and push the test out with compressed air, same for condensor. That flushes and removes old oil.

I hope I’ve answered all of your questions adequately.

06-14-2018, 06:37 PM	#6
WoodTruck Registered User Join Date: Sep 2014 Location: Kansas Posts: 7	Re: 1984 k20 A/C Help. I got everything at Oreilly’s. Prices were comparable to rock auto and I didn’t have to pay shipping. New Murray R4 compressor AC line (both hoses are made together on the compressor side) Murray accumulator. The old accumulator had a J tube built in that I had to buy a separate piece for, but from what I understand there are different styles. R134A cycle switch. Murray orifice tube Pag150 oil I would recommend replacing the high side schrader valve before you start, mine leaked after I got it charged the first time. There’s an O ring on the top side of the accumulator, bottom side, J tube to low side hose. At the compressor, o ring for the high side at the compressor, o ring at the condensor, o ring out of the condensor, o ring at the orifice tube. The flush I used was in an aerosol can, it’s nasty stuff. Spray it into the top of the evaporator and drain into a container at the bottom and push the test out with compressed air, same for condensor. That flushes and removes old oil. I hope I’ve answered all of your questions adequately.