New a/c compressor

i'm surprised it didn't come with a paper inside the box saying how much.

they did with cars. but that was 15 years ago.

 

Buy a cheap air powered vack. to vac. the air out, type of comp. york or sanden? all take diff. amount, did comp. lock up CK. inside lines for powered flakes with Q/tip

 

Advance Auto parts has a free toll loaner program with a deposit or CC#. They have a vacuum pump. You need to get all the air out. Now's a good time to change the connection o-rings. Make sure you use the green ones for an AC system.

There should be a label on the firewall with the refrigerant and oil specs. It has to be posted by vehicle standards. Systems use different oils but almost all R134a systems that haven't been retrofitted use PAG oil but different viscosities. I would double check the label just to be sure. It will list everything you need.

Your system completely evacuated and if you have a sleeper should be around 3.5 lbs or 56 ozs. Oil should be around 8 ozs so if you go 48 ozs freon and 8 ozs oil will be close to the correct ratio. If you don't evacuate the system you can leave as much as 50% behind so be careful how you charge if using cans keep a ratio of about 6:1 with refrigerant and oil. Too much oil is no good as it reduces your cooling power but it's even worse to have too little. You want to be within 2 ozs and you should be okay. Many stores sell the can freon with the oil mixed with it.

I think we have an AC tech that has posted before. Maybe he'll see this thread. I'll see if I can't find one of his posts.