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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (HVAC Systems - General Servicing) >> USING R-12 & R-134a REFRIGERANT >> IDENTIFYING R-134a SYSTEMS & COMPONENTS >> Fittings & "O" Rings

Fittings & "O" Rings

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All R-134a based A/C systems use 1/2" - 16 ACME threaded fittings (identifiable by square threads) and quick-connect service couplings. See Fig 1. Besides the use of these fittings, most manufacturers will use Green colored "O" rings in R-134a systems.

Fig 1: Identifying R-134a Fittings & Quick-Connect Service Couplings
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