Fluorescent Leak Detector

FLUORESCENT LEAK DETECTOR

Inspection


CHECKING SYSTEM FOR LEAKAGES USING THE FLUORESCENT LEAK DETECTOR

1.Check A/C system for leakages using the UV lamp and safety goggles (SST: J-42220) in a low sunlight area (area without windows preferable). Illuminate all components, fittings and lines. The dye appears as a bright green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain opening indicates an evaporator core assembly (tubes, core or expansion valve) leakage.
2.Use an adjustable mirror or wipe the area with a clean shop rag or cloth, with the UV lamp for dye residue if the suspected area is difficult to see.
3.Remove any residual dye using dye cleaner (SST: J-43872) to prevent future misdiagnosis after the leakage is repaired.
4.Perform a system performance check and verify the leakage repair with an approved electrical leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This may also cause false readings and may damage the detector.

DYE INJECTION

(This procedure is only necessary when recharging the system or when the compressor has seized and was replaced.)

1.Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.45 bar, 3.52 kg/cm2, 50 psi).
2.Pour one bottle [1/4 ounce (7.4 cc)] of the A/C refrigerant dye into the injector tool (SST: J-41459).
3.Connect the injector tool to the A/C low-pressure side service valve.
4.Start the engine. Then switch A/C ON.
5.Inject one bottle [1/4 ounce (7.4 cc)] of fluorescent dye through the low-pressure service valve using dye injector tool (SST: J-41459) (refer to the manufactures operating instructions) when the A/C operating (compressor running).
6.Disconnect the injector tool from the service valve with the engine still running.

CAUTION:
Be careful when replacing the A/C system or a component, pour the dye directly into the open system connection and proceed with the service procedures.
7.Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the leakage size, operating conditions and location of the leakage, it may take from minutes to days for the dye to penetrate a leakage and become visible.
8.Attach a blue label if necessary.