Fluorescent Dye Injection - Using An A/C Refrigerant Center & Dye Injector

NOTE: Before using the R-134a fluorescent dye injector for the first time, refer to the manufacturers instructions on evacuation of any non-condensable gasses from the hoses.

NOTE: Only connect the R-134a fluorescent dye injector to a manifold and gauge set or R-134a service center when fluorescent dye is to be injected. The R-134a fluorescent dye injector has a one way check valve that will prevent refrigerant system recovery and evacuation.

NOTE: Refrigerant system pressure should be between 413-551 kPa (60-80 psi) at 24°C (75°F) with the engine off.

Install an R-134a A/C refrigerant service center or a manifold and gauge set. For additional information, refer to MANIFOLD GAUGE SET CONNECTION .
Verify that the valves on the special tool are closed.

Fig 1: Identifying Manifold Gauge Set Valves
Courtesy of FORD MOTOR CO.
Fill the special tool reservoir with 7 ml (0.25 oz) of fluorescent dye.

Fig 2: Identifying Reservoir
Courtesy of FORD MOTOR CO.
Install the special tool between the low-pressure service gauge port valve and the R-134a refrigerant service center or manifold gauge set.
Open all valves and inject the fluorescent dye into the refrigerant system.
When fluorescent dye injection is complete, close all valves.
Recover the refrigerant from the R-134a fluorescent dye injector.
Remove the fluorescent dye injector from the low-pressure service gauge port valve and the R-134a A/C refrigerant service center or manifold gauge set.