FLUORESCENT DYE LEAK DETECTION

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1.  Check for leaks using a 120 W UV spot lamp.

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2.  Scan all components, fittings and lines of the A/C system.

3.  After the leak is repaired, remove any traces of leak dye with a general purpose oil solvent.

4.  Verify the repair by operating the system for a short time and inspecting with the UV spot lamp.

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Tracer dye injection

Note

•  System pressure should be between 413—551 kPa {4.22—5.61 kgf/cm², 60—80 psi} at 24 °C {75 °F} with the engine off.

1.  Install the Manifold Gauge Set or a recovery station. (See MANIFOLD GAUGE SET CONNECTION.)

2.  Turn the valve on the fluorescent tracer dye injector all the way to the left to close the valve.

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3.  Fill the reservoir with 7 ml {0.25 oz} of R-134a Fluorescent Tracer Dye 164-R3712.

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4.  Install the injector between the low-side quick disconnect and the vehicle low-pressure service gauge port valve.

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5.  Open all quick disconnect valves and charge the refrigerant system. (See A/C SYSTEM EVACUATION AND CHARGING.)

6.  When system charging is complete, recover the refrigerant from the dye injector.

7.  Remove the dye injector from the low-side quick disconnect valve.

Note

•  Only connect the dye-injector to the Manifold Gauge Set or the charging/recovery station when dye is to be injected. The dye injector has a one-way check valve that will prevent system refrigerant recovery and evacuation.