3.5 psi should hold it steady.
how much r134a charge for bus chevy chapion
You add it very expensively as it is the cost of gold. You will have to retrofit the system to R134A.
Depends on what you are retrofiting from- to? R-22 to R-410a or r-12 to r134a?
A 2004 year model vehicle uses R134a refrigerant.
R134a
i belive its r12 ... but just get a retrofit kit so u can make it a r134a
Just use a universal ester oil will work but I would really need to know what type of vehicle you are working on.........
The EPA states that the "procedures required for a least-cost retrofit are simple and do not require major component changes. Generally, the process calls for the removal of the oil refrigerant, installation of new fittings and a new label and the addition of either a polyalkylene glycol (PAG) or polyol ester (POE or ester) lubricant as well as the R134a refrigerant"... EPA There are many retrofit kits on the market you can get from an auto parts store like Autozone or Advance and even at discount stores like Wal-mart. ID and Quest are two brands on the market that have closed retrofit kits available.
R134a is all that is available If you have an R12 system You have to retrofit to R134a I didn't go through the hassle of changing the entire system to r134a I just recharged the system with the new freon and it's working just fine. The coolant even last longer.
R134a
anything 94 and below is going to be r12, unless someone has put a retrofit kit on there then it could be r134a. some people have been know to put other dangerous things in there freon. r12 freon is really expensive. the best thing to do is go to local auto parts store and buy a r12 to r134a retrofit kit and have the system retrofitted
freon R134A - MAY NEED RETROFITTING (LINE ADAPTERS FROM R12 TO R134A) MOST COST ABOUT $15.00. COMPLETE CHARGE SHOULD COST ABOUT $145.00.