PPG Training

Custom Restoration Guide 2017

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72 SPRAY GUN TROUBLESHOOTING HVLP AND COMPLIANT EQUIPMENT PD-0410 Caution: Wear the proper safety protection when sanding, cleaning, mixing and spraying all materials included within this process. FLUID TIP SIZE AND AIR CAP Follow spray gun or paint manufacturer's recommendations for the product being used. BANANA, HEAVY TOP OR BOTTOM PATTERN Fluid tip or air cap is dirty/damaged Test spray pattern, rotate 180 degrees and test again to isolate cause. Clean both items thoroughly or replace fluid tip or air cap if damaged. HEAVY CENTER OR BALL END PATTERN Too much fluid flow or bad air/paint setting Fluid flow too high—reduce Air pressure too low—increase Fluid tip too large—reduce SINGLE OR DOUBLE SPLIT PATTERN Too much air for fluid quantity used Reduce air pressure at regulator. Increase fluid flow by changing fluid tip size or opening needle control knob. INTERMITTENT FAN OR 'FLUTTERING' Air in the fluid passageway Insufficient paint in cup Fluid tip loose Fluid needle packing or packing screw loose Cup vent hole clogged

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