The Development of a Retrofitting Procedure for CFC-12 Automotive A/C Systems to HFC-134a and P.A.G. Lubricant 932906
Extensive vehicle fleet testing, followed by laboratory analysis of various vital parts of the air-conditioning systems, have been performed in order to develop a procedure for retrofitting existing CFC-12 automotive air-conditioning systems to HFC-134a.
Testing shows that a compressor in good condition that has previously been used with CFC-12, can be re-used with HFC-134a provided that the appropriate oil, desiccant and elastomer is used. Testing has also shown that flushing the system is not necessary.
The procedure in this paper was developed as a result of testing and proposes a procedure that will maintain an “acceptable” life of the compressor at a reasonable cost.
Citation: Ax, H., Jingu, N., and Komatu, S., "The Development of a Retrofitting Procedure for CFC-12 Automotive A/C Systems to HFC-134a and P.A.G. Lubricant," SAE Technical Paper 932906, 1993, https://doi.org/10.4271/932906. Download Citation
Henrik Ax, Naoki Jingu, Shunji Komatu
Passenger Car Conference & Exposition
SAE 1993 Transactions: Journal of Passenger Cars-V102-6