KO1960
Newbie
First time poster. This looks like a great site. My daughter has a 1990 GMC Sierra 1500 shortbed, with the 5.7. We have done quite a bit of maintenance and enjoy working on the truck together (I have a garage with lots of tools).
Our latest project is converting the AC to R134a. We purchased a kit from RockAuto which included a R4 compressor, a receiver dryer, condenser, o-rings and pag oil. The first problem encountered was the new condenser that came with the kit had different fittings, so the hoses wouldn't work. The old pressure switch at the back of the existing compressor disintegrated upon removal, so it has to be replaced. The liquid line that goes to the condenser galled up at the condenser and had to be cut out.
So, back to RockAuto. We ordered different hoses to fit the new condenser, an AC clutch switch (AC Delco 152832), which mounts on the receiver dryer, and a liquid line. RockAuto sells (2) different pressure switches for the back of the compressor, one for low pressure, and one for high pressure. They are both 2 wire switches, and the existing connector has only one pin.
Questions: 1. High pressure or low pressure switch? 2. The 2 wire connector - one wire to ground? 3. Anything else that we're missing?
Sorry for the long post. Thanks, Kurt.
Our latest project is converting the AC to R134a. We purchased a kit from RockAuto which included a R4 compressor, a receiver dryer, condenser, o-rings and pag oil. The first problem encountered was the new condenser that came with the kit had different fittings, so the hoses wouldn't work. The old pressure switch at the back of the existing compressor disintegrated upon removal, so it has to be replaced. The liquid line that goes to the condenser galled up at the condenser and had to be cut out.
So, back to RockAuto. We ordered different hoses to fit the new condenser, an AC clutch switch (AC Delco 152832), which mounts on the receiver dryer, and a liquid line. RockAuto sells (2) different pressure switches for the back of the compressor, one for low pressure, and one for high pressure. They are both 2 wire switches, and the existing connector has only one pin.
Questions: 1. High pressure or low pressure switch? 2. The 2 wire connector - one wire to ground? 3. Anything else that we're missing?
Sorry for the long post. Thanks, Kurt.