High and Low side a/c
The other thing here, is, you cannot just buy 134A conversion fittings and dump that refrigerant into an R12 system.
But 134A fittings --to hoses-- are standardized. The high side is stupidly larger, and red, and the low side is stupidly smaller, and blue. You cannot accidently interchange as with older R12 fittings, which were pretty much all 1/4 SAE flare, or no.4 SAE flare. That is NOT JIC and NOT AN. That is SAE
(Why stupidly? Because a low pressure system flows less than a high pressure one, the low side system should have a larger size port to flow quantity. If you are evacuating a system, the blue should have been larger. Stupid)
Some later model stuff, like my (former) 86 and 87 Rangers, had a proprietary small flare fitting on one side I don't remember which.
These are R12 manifold/ hose adapters.........to R134A system adapters
https://www.amazon.com/dp/B07T9HFBCH/?tag=fabo03-20
134a Quick Coupler, AC R134a Adapter Fittings Quick Connector, 1/4" SAE Male Flare High/Low A/C Freon Manifold Gauge Hose Conversion Kit
The other thing here, is, you cannot just buy 134A conversion fittings and dump that refrigerant into an R12 system.
But 134A fittings --to hoses-- are standardized. The high side is stupidly larger, and red, and the low side is stupidly smaller, and blue. You cannot accidently interchange as with older R12 fittings, which were pretty much all 1/4 SAE flare, or no.4 SAE flare. That is NOT JIC and NOT AN. That is SAE
(Why stupidly? Because a low pressure system flows less than a high pressure one, the low side system should have a larger size port to flow quantity. If you are evacuating a system, the blue should have been larger. Stupid)
Some later model stuff, like my (former) 86 and 87 Rangers, had a proprietary small flare fitting on one side I don't remember which.
These are R12 manifold/ hose adapters.........to R134A system adapters
https://www.amazon.com/dp/B07T9HFBCH/?tag=fabo03-20
134a Quick Coupler, AC R134a Adapter Fittings Quick Connector, 1/4" SAE Male Flare High/Low A/C Freon Manifold Gauge Hose Conversion Kit
