I just got finished swapping a 12v Cummins into a 96 F350. The Cummins came with a Sanden 9279 R12 AC compressor. The truck is a 134A system. Sanden does not recommend using 134A in their R12 compressors. I have plenty of R12 to use if I were to charge it with that. The system is complete and holds vacuum. I just don't know what to put in it.
R12. You have it, use it.
I'm a Sanden distributor. Change the oil in the compressor to a PAG oil and charge it with 134A. It won't hurt the compressor unless you don't use enough oil or it's in bad shape to begin with. Then you may have the refrigerant leaking through the seals. Worst case is down the road you end up buying a 134A compressor. You don't want to run R-12 in an R-134A system.
bravenrace wrote: I'm a Sanden distributor. Change the oil in the compressor to a PAG oil and charge it with 134A. It won't hurt the compressor unless you don't use enough oil or it's in bad shape to begin with. Then you may have the refrigerant leaking through the seals. Worst case is down the road you end up buying a 134A compressor. You don't want to run R-12 in an R-134A system.
Can you find me a 134 A compressor that will replace the 9279?
For general information purposes can you say why you wouldn't use r12 in a 134a system?
Yes, I can provide a compressor that would replace that one, although I'll have to check to see if I they have an exact crossover. Worst case would be you may have to fab up a mount or buy one from us. Why didn't you use the compressor from the Ford?
R-12 and R134A systems are designed to be optomized with each particular refrigerant. If you fully flush the system out, you can run R-12 in the 134 system, but it may not perform well. It won't hurt anything as long as you have the correct compressor oil.
Really though, why use an obsolete refrigerant? You'll be farther ahead using 134 in a 134 system.
Does your compressor look like this? If not, then I need more specifics - The year of the truck and engine model, and where on the engine is it mounted (from the drivers viewpoint).
Any Dodge Ram from 96+ would have an R134A compressor. Maybe a few years earlier do to, 93 or 94 was the switch-over date as I recall.
My 1996 Dodge Ram with a 12 valve Cummins has R134A in the HVAC.
Totally missed that it was an R134A system. Sorry about the bad info.
Yes it looks like the compressor pictured. The dodge compressor interferes with the frame in most conversions. The drivetrain I have came out of a previously converted 88 F350 and uses an aftermarket compressor mount. A friend looked at it today and recognized the set up from some fleet trucks with refer units on the back.
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