Seller notes

AC Oil and Dye Injector for R134a R1234yf with Adjustable Coupler Oil Checkers InstructionRotate the inside cylinder clockwise to the topUnscrew the cover on the top of the smaller cylinderPour the liquid (Refrigeration Oil / Fluorescent Dye / Leak Detection Dye) into the cylinderTighten the coverIf the cylinder is not full filled with oil, then discharge the air is needed. (Rotate the bigger cylinder counterclockwise until the oil flows out at the end of the hose.)Turn on the car air conditione...

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