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240 244 with York 210 compressor - how much oil for dry system?

jamesinc

WD-40 Enthusiast
Joined
Dec 28, 2010
Location
Sydney, Australia
I've rebuilt the A/C on an old 244 I'm restoring. It has a York 210 compressor. I have 100% stripped this system bare. The compressor has been rebuilt, the dryer is new, the lines are new, the evaporator core is (okay I got cheap at this point and went for a used one). But the whole system has been flushed clean. So my understanding is I should take the total oil requirement for the system, and put half into the dryer, and half into the inlet port on the compressor, then prime it by hand.

I'm using PAO100 oil (it'll be using HyChill refrigerant which is an R12 substitute). I've seen one or two sites recommend PAO68 instead, but I think PAO100 is the correct weight).

My question is how much oil does the system require? One place I saw said 1.1L (38 oz.), but I was hoping someone might confirm.
 
I am not an AC technician but that seems like a LOT of oil. My hybrid Ford/Volvo AC system takes 8 oz. The 38 oz sounds more like the freon charge weight.
 
Volvo manual says 300cc (both the 209 and the 210). Charge weight varies with the car, but 2.4 lbs R12 for the first 4 years of the 240 matches that 38 oz. number.
 
Okay so looking at the rebuild manual for the compressor, it looks like it needs 14 ounces poured into the filler plug on the compressor.

This is when using it with R134a. For R12 systems, it only needs 12 ounces.
 
Okay I think that's where the confusion was. I think I need 14 oz of ester oil for the compressor crankcase, and then however much oil for the A/C system.
 
The freon in the system carries the oil through out the system. Too much oil in the system will reduce it's performance by restricting flow through the expansion valve or fixed orifice , too little oil will lead to premature failure of the compressor.

You have done a lot of work getting your system to where it's at, it would be a shame to screw it up now. I suggest you do a little more work now and find the correct spec and follow it.
 
The freon in the system carries the oil through out the system. Too much oil in the system will reduce it's performance by restricting flow through the expansion valve or fixed orifice , too little oil will lead to premature failure of the compressor.

You have done a lot of work getting your system to where it's at, it would be a shame to screw it up now. I suggest you do a little more work now and find the correct spec and follow it.

The York is self contained. It has its own oil supply, separate from the pressure side. Its a piston type. It has a little crank shaft, and a little piston and connecting rod.
 
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