Need Help with A/C

[Beau-Kat]

Hey guys.

I haven't been on here in about a year or so.

Here is my problem:
I have a 1987 2.9L Ranger with the original HR980 compressor and 161,000 miles. The truck's nearly perfect because I bought it 3 years ago from the original owner, who is now 80 years old.

The A/C's R-12 eventually leaked down, so I converted it to R134-A. After about a year, it eventually screwed something up. Seems the compressor isn't separating the high and low pressures internally. I have high pressure on both the high pressure and low pressure sides. The compressor gets extremely hot very quickly and no cold air at all at the vents.

I can blow air through the whole system (including the compressor). I have replaced the drier and the expansion valve drawn a vacuum and refilled the system with R134-A and the correct amount of that gas' compatable oil.

Anyway, I am looking for help from anyone experienced with the HR980 compressors, conversions, alternatives, kits, etc.

I found some new HR980s on ebay, but they all had the spring-lock connection points, while mine has the screw-on fittings.

Anyone ever replaced their HR980 with something else (hopefully reasonably priced)? Any suggestions what I can do to get some A/C in my truck?

I'm at my truck's mercy. It's upper 90s and 90-95% humidity here in SC everyday right now.

Thanks.
Rusty

 

[v8318cid]

Based upon what you're saying, it sounds like you have a restriction somewhere in the system, possibly suction side near the oriface tube. It may not be enough to totally obstruct refrigerant flow, but its obviously preventing the system from working properly. Also check for proper air flow across your condensor. Just for kicks and grins, try holding the suction line right before the compressor as you engage the A/C and see if the line temp drops at all or if it immediately goes up. Should tell you if the system is doing anything at all prior to shooting up.

 

[brutus]

Hey Rusty, I`m new here to these forums, but air conditioning puts the bread on the table. First and formost dont blow any air into system that will contaminate everthing. you stated that you lost charge, these systems are like tires no leaks or there`s a proplem. Its sounds to me that the valves are bad in compressor thats the reason the presures are equal, replace compressor, replace dryer/accumalator, nearst parts store or you might have yours rebuilt,I`m pretty sure the compressor is avalable. install new compressor ,change dryer evacuate system to inside 100-250 microns on scale and let stand to make sure no air leaks,recharge to system lable. now R-12 has been removed from service so you will be changing to 134-A and they will furnish the oil needed to up grade to 134-a. DO NOT TRY WITHOUT OIL IN FIRST there will be instrustions in new compressor. You stated that presures are equal I`m asumming you have a manifold set to measure presure and you need vacuum pump and a good vacuum gauge, make sure you get correct charge, know it wount run as cold as it did with R-12 but you will be pleased Good luck Brutus I`l will watch post