How to retrofit R12 to R134a by classic auto air?

R12 Recovery – Recover refrigerant from the A/C system using a dedicated R12 recovery device (to SAE J1990). R12 Parts replacement – Remove the components to be replaced as part of the retrofit to R134a, as recommended by the A/C system or vehicle manufacturers guidelines. Add 30-50ml PAO oil to a/c system. Retrofit warning labels.

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

When did they start using the R134a instead of the R12?

Many organizations consider that R134A contributes to global warming. Vehicles which were manufactured in the year 1994 and early used to use the R12 for the air conditioning. Cars older than 1994 started using the R134A instead of R12.

How to retrofit R-12 to 134A with heat lamp?

OK to complete assembly, check for vacuum leaks (if no hurry, let it sit under vacuum for 12 to 24 hours) then fill with some R134a (say a can or two) and wait for warm day to top off charge. If not replacing accumulator/drier, then place heat lamp on it to get it up to about 150°F to boil out the moisture in the desiccant while under vacuum.

Can a Ford R-12 be converted to 134A?

Since then, the industry standard has been R134a, which is an efficient replacement. Contrary to popular belief, most cars originally equipped with R-12 can be converted to 134a and still keep you just as cool. Understanding the basic type of a/c systems Ford used on their classics will help with you determine the best route for your project.

What kind of oil to use for R12 refrigerant?

Majority of automotive manufacturers recommending PAG (Poly Alkaline Glycol) oil as the only oil replacement when retrofitting R12 automotive A/C systems to operate on R134a refrigerant. Ariazone also recommends POA oil which is fully synthetic oil and suitable for all compressors + refrigerant R12 and R134a.

Which is oil to use with R-134a?

When R-134a replaced R-12, PAG became the factory specified oil. You’ll find three common viscosities when choosing PAG oil. PAG (ISO) 46 – Thin PAG (ISO) 100 – Medium PAG (ISO) 150 – Thick GM sometimes recommends oil which is close to ISO 135.

What kind of lubricant to use with R-134a?

The lubricant used with R-12 is mineral oil. Mineral oil will not mix with R-134a, and thus you must use PAG oil. The mineral oil does not need to be removed, as it will seek out quiet spots in the system to just sit there. This is actually the recommended OEM retrofit procedure from automobile manufacturers.

Can you add R134a oil to air onditioning system?

Connect a can of R134a lubricant to the yellow hose, open the low side valve and allow the vacuum in the system to draw the oil in. Inspect your vehicle’s service manual for specific requirement on how much oil to add to the air -onditioning system. Skip this step if the refrigerant you are adding contains oil.

How to retrofit R12 to R134a by classic auto air?