A 2004 year model vehicle uses R134a refrigerant.
Assuming it is the same type of "freon", yes. The freon would be removed from the old system with a recovory/recycling machine.Assuming it is the same type of "freon", yes. The freon would be removed from the old system with a recovory/recycling machine.
I do not know of any freon diagrams. I would not recommend trying to charge your air conditioning sytem; it is very complex and the system is under high pressure. Take your car to a professional.
You would charge it from the low side port.
A closed system would be full of freon without any leaks and a opened system would have no freon or has leaks...........
Service call freon check it out for clogged condenser $100.00
100 bucks or so
You might need freon
Would have been built for R12, can be converted to R134a.
It is probably getting low on freon. When the system has minor leaks and the freon pressure lowers the system begins to shut off the compressor which circulates the freon through the system to protect the compressor and other components from damage. Have the system recharged, or add freon on your own. You can now get freon from many parts stores.
The Freon charge for a 1993 Peterbilt 379 typically uses R-12 refrigerant, and the standard charge is around 3 to 4 pounds. However, if the system has been retrofitted to use R-134a, the charge would generally be about 2 to 3 pounds. It's always best to refer to the vehicle's service manual or consult with a professional for the most accurate specifications.
It would take 30 min. average time to add this charge to the system.
Should be a pressure switch located on the top of the air drier/acculmulator -- jump this with a paper clip and clutch should pull in allowing you to charge system