| [GMCnet] Kanomata air conditioning compressor [message #218055] |
Mon, 12 August 2013 18:26  |
emerystora
Messages: 4442
Registered: January 2004
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Senior Member |
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I had posted a few days back that my air conditioner stopped working -- in spite of the fact that it had a good charge of Duracool.
Checking the high side of the compressor I found that I was only getting approx. 100 psi which was low.
I purchased an air conditioner from Jim Kanomata. It was a new one that he is carrying. It is aluminum and weighs 17 pounds. That is compared to the original which weighed 34 pounds.
It didn't come with any instructions except a slip of paper in the box that said it was filled with 7.43 ounces of PAG 46.
Since PAG 46 is death to an air conditioner system filled with mineral oil (the Internet says it will react and form a peanut butter like paste inside the air conditioner system), I drained the compressor, flushed it out with mineral spirits, drained that and put in 7.4 oz. of mineral oil. BIG MISTAKE!
When I charged with Duracool I got no cooling. After thinking it over, I decided that the 7.43 oz. was likely what the whole system needed but since I was leaving my dryer, condensor and evaporator in place they already had oil in them. So, I released the Duracool through the high side fitting in order to deliberatly purge off some oil. I heal a rag around the fitting and let the oil drip into a jar. After I figured that I had about 3 or 4 ounces I was also our of charge in the system.
I evacuated the system and refilled with three cans of Duracool and I now have cooling! I will fine turn the charge later when it is not 90 degrees out as it is today.
The high side is now 170 psi and the low side is about 30 psi at 1500 rpm. That is going to be close to the right charge.
I will soon be writing up an installation procedure for Jim to include in the boxes he ships out with the new compressor.
I was really thinking of installing a Sanden but didn't know where I could get the one with the GMC rear fitting in a short amount of time. We are leaving for a GMC Mountainaires rally before this next weekend.
Emery Stora
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