How do you convert r12 to r134 on a Ford Truck?

If there are any leaks in the system, they should be addressed first. The system needs to be recovered of any r-12 and remove the oil and the compressor oil. The accumulator (or receiver/dryer) needs to be replaced.





The system needs to have the proper amount of r134





compatable oil added back in. You can














measaure what comes out of the compressor and add that amount back in. Then add about one oz. per major component (condenser, evaporator, dryer). Ester oil is good for retro fitting because it is compatable with both oils. There are fittings you can buy (kit?) that screw onto your r-12 ports that allow you to evacuate and recharge it with r134-a. Typically, the new charge amount will be approximately 80 percent of the old charge. IE: if the vehicle held 3.75# of r-12 (x.8) is 3# of r134-a.














If there are any leaks in the system, they should be addressed first. The system needs to be recovered of any r-12 and remove the oil and the compressor oil. The accumulator (or receiver/dryer) needs to be replaced. The system needs to have the proper amount of r134 compatable oil added back in. You can measaure what comes out of the compressor and add that amount back in. Then add about one oz. per major component (condenser, evaporator, dryer). Ester oil is good for retro fitting because it is compatable with both oils. There are fittings you can buy (kit?) that screw onto your r-12 ports that allow you to evacuate and recharge it with r134-a. Typically, the new charge amount will be approximately 80 percent of the old charge. IE: if the vehicle held 3.75# of r-12 (x.8) is 3# of r134-a.