R134 High/Low A/C preasures

[twodogs]

I have a 1985 Toyota P/U 4x4 R22 that has been converted to R134 at an A/C shop. I was told I need to convert to electric fan to improve overal cooling. I did that but no improvement. 65 degrees at the center duct. What should the high and low preasures be at idle with 134R? Thanks

[fourwd1]

Since your system was not designed to work with R134, that info won't be normally available. Maybe someone else who has done the conversion and has a set of AC gauges maybe able to help.
I did the conversion on my 84 4-5 years ago, and I have the gauge set, but unfortunately the increased pressure form the R134 blew out the front seal of the compressor last summer.

[twodogs]

Thanks for the info. I'm afraid of blowing the seal out of mine also because the high side preasure is double what the system should be when it ran on R-12.... Nice Truck BTW.

[fourwd1]

Thanks.

Yeah, I knew it could happen when I had it converted, but the truck was already 20+ years old then, and since it lasted 4 or 5 more years under the higher pressure, I can't complain.

Since the compressor actually still works, I'm thinking of converting it for use as in a on-board air system. Just need a one-way valve so the tank does't bleed back out thru the compressor.