Fluorescent Dye Injection - Using A Dye Injector Loop Kit

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

NOTE: Refrigerant system pressure should be between 413-551 kPa (60-80 psi) at 24°C.

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 high-pressure and low-pressure service gauge port valves.

CAUTION: Make sure all tools and hoses are clear of the engine cooling fan and drive belt before starting the engine.

Start the engine.
Open the high-pressure service valve.

Fig 3: Identifying High-Pressure Service Valve
Courtesy of FORD MOTOR CO.
Open the special tool valves and inject the fluorescent dye into the refrigerant system.

Fig 4: Opening Manifold Gauge Set Valves
Courtesy of FORD MOTOR CO.
Close the high-pressure service valve to allow the pressure inside the special tool to equalize with the suction side of the refrigerant system.

Fig 5: Identifying High-Pressure Service Valve
Courtesy of FORD MOTOR CO.

NOTE: Close the valves on the special tool while the A/C compressor is operating.

Fig 6: Closing Manifold Gauge Set Valves

Courtesy of FORD MOTOR CO.

Close the valves on the special tool.

NOTE: Leave all valves on the special tool closed when not in use.

Disconnect the high-pressure and low-pressure service valves and remove the special tool from the vehicle.