SJTD wrote: ↑Sun Jul 05, 2020 7:57 pm
If you open the system you should replace the drier.
You have a failed hose and should replace it or have an AC shop put new hose on your fittings. Might as well do all the hoses since they're 30 years old.
The pumps are the same but for 134 they'll be filled with the wrong oil. Should be able to find one with the correct oil. Contact the vendor. Otherwise you'll have to flush the oil out and replace with the right stuff. Seems I've heard of something that's compatible with mineral oil but not PAG which is what the new pump is prolly full of.
If you convert to 134 the condenser and evaporator need to be flushed to remove the oil.
I'd say the evaporator isn't too hard to get to but you have the new dash.
Watch out for AC parts being sold for Wagoneers that are actually for the fancy '84 and up mini Cherokees.
Did I say you should replace the drier?
Yea i know all too well parts for the boxy cherokee's. Na the compressors im looking at look identical to mine, Althought they have 1 wire, and 1 ground bolted to the compressor itself, vs my compressor with a power and ground wire going into the harness, but since the engine is grounded and its bolted to the engine i dont think it needs the ground wire, just to be grounded to itself.
As for whats in it, from the question im reading someone asked, the compressor isnt filled with pag or mineral oil. The person selling them replied its lightly "oiled" to just keep a surface film on it, so it needs filled. I can pop the nut off the top and check to be sure. The drier ill buy its only 16$, i guess i can get the condensor too. $250 isnt bad.
The links below are the parts im looking at, they look like the right ones i need
https://www.ebay.com/itm/For-1985-1991- ... %7Ciid%3A1
https://www.ebay.com/itm/UAC-Temp-Contr ... 2bcfd311b7
https://www.ebay.com/itm/For-1984-1991- ... 0005.m1851
The hose uhg i really DO not wanna tear my dash off to get the line going to the evaporator coil.. Id have to remove the windsheild to get to the dash bolts.. That isnt worth damaging my gasket or windsheild over. Is there no way to get to the coil from under the dash by removing the fan motor or something ? Or does the hose disconnect at the firewall under the heatercore box ?
I guess i should flush out the evaporator coil ? Maybe its a good time for me to buy that Ryobi 1 gallon compressor since you need compressor air to flush the evap coil from the videos ive seen. I have like 8 ryobi lithium batteries and i like that their little compressor is battery powered been wanting one to take with me in my Jeep in case i need air for my tires or something