When retrofitting an AC system from R12 to R134a what oil should be recommended?
R-134a systems require PAG (polyalkylene glycol) oil of a certain grade. PAG oil is hygroscopic, meaning that it readily absorbs moisture from the air. Never leave the cap loose when storing PAG refrigerant oil. Some manufacturers recommend using less hygroscopic POE (Polyol Ester) oil instead of PAG after a retrofit.
How do you convert R12 to r134?
How to Convert an R12 to the R134a System
- Discard any R12 refrigerant still in the system by taking your vehicle to a licensed air-conditioning professional.
- Open the engine compartment of your vehicle.
- Push the high side retrofit R134a fitting over the old fitting and use a wrench to tighten it.
What happens if you put R134a in a R12 system?
R134a systems work at higher discharge-side pressures than R12 systems, which could lead to compressor seals leaks. Additionally, since R134a is composed of much smaller molecules, it has a greater chance of leaking from an R12 system.
What is the replacement for R12 refrigerant?
R134a
There are three replacement refrigerant options for R12 systems: R134a, R401a, R401b. R134a is regarded, by manufacturers and adherents to the Montreal Protocols alike, as the best replacement refrigerant.
Can I mix R12 and 134a?
R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. Bottom line, R134a simply doesn’t cool as well as R12. The advantage of ester oil is that it works with both R12 as well as R134a, so you can fill the system with it and then use either refrigerant.
How do you tell if you have R12 or 134a?
when new,it was r12. if it’s been changed over,look at the hi and low side ports. see if 134a adapters are screwed down on top of the r12 fitting ports. they will be larger.
How do I know if my AC is R12 or R134a?
Can I mix 134a with R12?
Is it legal to buy R12 refrigerant?
Is it legal for me to sell? Yes, you can still sell R-12 and other CFC refrigerants. Although these refrigerants can no longer be manufactured, it is perfectly legal to sell to an EPA certified buyer.
What happens if you mix AC refrigerants?
Mixing refrigerants can have an adverse effect on air conditioning and refrigeration systems, resulting in reduced efficiency, performance, and longevity. And it can create a safety hazard for the technician who may not know exactly what type of refrigerant a system may contain.
What type of refrigerant does Toyota use?
Toyota refrigerant filling quantities R134a an 1234yf.
Can you mix R134a Freon with R12?
Is it possible to retrofit an R-12 a / C system?
The other approach to retrofit is the “quick and cheap” one. On many 1989 through 1993 vintage vehicles, R-12 A/C systems can be converted by simply recovering any refrigerant that is still in the system, adding POE oil (which is compatible with both types of refrigerant), and recharging to 85 to 90% capacity with R-134a.
Can a R-12 air conditioner be converted to an R-134a?
Because R-12 is no longer produced in the U.S. Supplies of recycled R-12 still exist, and some R-12 is still brought in from offshore suppliers. But it is hard to find and expensive. That’s why many people simply recharge their older R-12 air conditioning system with R-134a after repairs have been made. R-134a Retrofit Conversion Costs
Can You retrofit a car to use R-134a refrigerant?
There is NO reason to retrofit a vehicle to R-134a as long as the R-12 system is cooling properly and contains a normal charge of refrigerant. A/C systems designed to use R-12 will cool best when charged with R-12 refrigerant. Even if the system leaks, repairing the leaks and recharging it with R-12 is usually the best repair alternative.
Is it possible to recharge an R-12 air conditioner?
Because R-12 is no longer produced in the U.S. Supplies of recycled R-12 still exist, and some R-12 is still brought in from offshore suppliers. But it is hard to find and expensive. That’s why many people simply recharge their older R-12 air conditioning system with R-134a after repairs have been made.