Converting from R12 to R134a

[jick.cejoco]

how about the hoses?

hoses previously used with R12 systems maybe used with R134a. new hoses made for R12 will leak if used on R134a.

to determine the high side pressure without the discharge service port, you can use an infrared thermometer on the upper tube of the condenser and compare the temperature to the pressure using the R134a pressure/temperature chart. the other way is to compare the temperature of the condenser top with the pressure/temperature dial of the manifold gauge. this will give you about 90% accuracy of the estimated pressure

[red_one]

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.

THE MINIMUM:
- Filter drier or accumulator;
- High side system "O" rings through to the evaporator inlet;
- Add 30-50ml PAO oil to a/c system.
- Fit high/low side R134a charging port adapters (use a thread lock to secure to R12 charging ports)
- Retrofit warning labels.

[miked]

hoses previously used with R12 systems maybe used with R134a. new hoses made for R12 will leak if used on R134a.

to determine the high side pressure without the discharge service port, you can use an infrared thermometer on the upper tube of the condenser and compare the temperature to the pressure using the R134a pressure/temperature chart. the other way is to compare the temperature of the condenser top with the pressure/temperature dial of the manifold gauge. this will give you about 90% accuracy of the estimated pressure

now i have another reason to buy a new toy! hahaha....

[jaypee10]

kung palit freon ka lang at kailangan eh 134a papalitan lang ng expansion valve yan saka filter dryer.vacum flashing saka kargahan na ng 134a na freon kung good pa ung compre mo..pero sigurado akong copper pa ung evaporator mo kaya mas maganda kung mapa litan din ng aluminum evaporator.