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A/c System Volume


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Bob, according to the hand-written note in the downloadable PDF copy of the Behr a/c installation manual, "the recommended refrigerant charge for the '74 2002tii is 22oz of R-12." One of the advantages of running R12 is that there is a good correlation between gauge pressure and ambient temperature (whereas for R134a it's all over the map), so I dump in two 12oz cans of R12, make sure the pressure doesn't go nuts, and call it done.

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