According to the norms, the car AC is refilled twice a year. The refilling technology is divided into stages, it is necessary to comply with each stage, otherwise the service term of the air conditioner will decrease.
The best period for refilling is the beginning and end of the summer season. In winter the automotive air conditioner is rarely used but you should maintain it anyway. Diagnostics will help to determine which measures are relevant for the air conditioner in a given period.
What freon is suitable for air conditioner?
Information about the danger of the r12 refrigerant became publicly available in 1992, then it was claimed that it was a danger to the ozone layer and its release was stopped. The r12 refrigerant gradually began to be replaced with a safer r134. According to technical requirements, the use of r134 caused changes in the entire system design. Work on r134 presumes the presence of synthetic oils, and r12 can also work on mineral oils. Freon for ac with oil of synthetic origin is more expensive.
What happens if you accidentally refill r134 in 12 system? The gas will not be able to dissolve the oil and the compressor will start to wedge without receiving lubrication. To prevent mistakes, the manufacturer developed refilling nipples for r134, which differed from r12.
- Fittings for refilling r12 are similar to nipples for wheels with a cap that twists like a car wheel.
- The fittings for r134 freon have a larger diameter and height. They resemble connections for pneumatic tools.
The plastic cap for the r12 system resembles a wheel. And the caps for r134 resemble large toothpaste tube lids. It is clear that it is almost impossible to confuse and use equipment r12 instead of r134.
Cars released date before 1992 operate on r12. Freon brand for cars after this date is r134. Doubts can arise only from owners of cars of 1992-1993 of release. This period is considered transitional. The above information will help car owners to understand what system is in their car.
Curious fact is that today scientists have refuted the pernicious effect of r12 freon. The occurrence of ozone holes has been recognized cyclical. Most likely, the ban on r12 was the work of the American chemical company ‘Dupont’. Everyone in the world uses the expensive r134 and the plants of the former USSR which produced the 12th freon are closed.
Car AC compressor oil refill
Changing the air conditioner compressor in the car, it is necessary to set the oil level taking into account its type and quantity.
It is necessary to know the amount of oil in the replacing compressor. There is a full refill (236 ml), half refill of the volume or absence of oil completely. When there is oil in the compressor, it must be drained and refilled in the right amount to balance the system.
It is required to apply only the type of oil specified by the manufacturer with regard to its viscosity. If you ignore the regulations, the compressor will make noise and wear out early.
After the filling procedure, it is necessary to rotate the clutch before installing the unit itself. Scrolling will help spread the oil through the compressor, reduce the probability of breakage due to dry bearings, reduce the starting torque at the first movement of the clutch.
Refilling and all other procedures related to car air conditioning must be carried out in car service centers. Drivers are not allowed to independently engage in these works. If this happens, the manufacturer disclaims any warranty obligations.
And, by the way, our test bench for AC compressors works as ac refill kit as well, it is one of the most popular stands in our product line.
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