Sometimes we have a problem with our pneumatic paint spray gun. Here are some of the problems that can occur, and the corresponding solutions. I think you'll need them, good luck with your air spray gun!
Nozzle tip drips or leaks when gun is not triggered:
This means the needle and tip are not seating properly. This could be due to wear, damage, clogging, or debris. Remove the tip and clean it, making sure there is nothing in it that prevents the needle from seating. After reassembly, if there is still leakage, the needle and nozzle will likely need to be replaced.
Material does not flow:
Paint clogged at gun or material supply. If it is a gravity gun, check that the cup is connected properly and check that the cup is vented. There is a small hole near the top of the gravity cup, make sure it is not clogged.
Packing is leaking:
Tighten packing nut until leak stops. If this does not work, the needle packing will need to be replaced.
Problem Causes Measures 1.Paint comes and goes 1. Air entering the paint passages 1. Prevent air from entering the paint channel 2. Insufficient paint in paint container 2. Top up paint 3. Loose or broken paint fittings 3. Tighten and replace 4. Clogged paint passages 4. Remove dried-on material 5. Damaged or poorly fastened nozzle 5. Replace and tighten nozzle 6. broken or loose needle valve sealing washer 6. Replace and tighten needle valve sealing washer. 7. High paint viscosity 7. Thin paint to proper viscosity. 8. Plugged air holes in paint container lid on suction or gravity 8. Remove air hole plugs from paint container lids. 2.Incomplete spray pattern 1. Clogged corner hole in air cap First try to spray, and then turn the air cap 180 °, take the two spray pattern comparison, if the spray pattern is the same, is a bad nozzle; if the spray pattern is different, it is a bad air cap 2. Dirt on side of paint nozzle 1. Remove the air cap of the corner of the hole plugging material 3. Clogging between the center hole of the air cap and the paint nozzle or clogging of the air cap's auxiliary spray hole 2. Remove dirt 4. Dirt adhering to the contact surface of the air cap and paint nozzle, causing the air cap to mismatch poorly 3. Remove the blockage 5. one of the air cap and nozzle is damaged 4. Remove the dirt 5. Replacement of damaged parts 3.Spray side too thick 1. Air cap and nozzle gap part of the dirt or have in the paint adhesion 1. Remove dirt or dry paint 2. Loose air cap 2. Tighten air cap 3. Deformation of air cap or nozzle 3. Replace deformed air cap or nozzle. 4.Thin in the center and thick on both sides 1. Spraying air pressure is too high 1. Adjust spraying air pressure 2. Paint viscosity is too low 2. Increase the viscosity of the paint 3. Too much air in the corner hole 3. Reduce the amount of air in the corner holes 4. In the air cap and nozzle gap in the dirt or paint fixation 4. Remove dirt or solid paint. 5. Small spray volume 5. Increase spray volume 5. thin sides，Heavy Center 1. Air adjusting bolt cap is tightened too tightly 1. Loosen the air adjusting bolt cap appropriately. 2. Spraying air pressure is too low 2. Increase spraying air pressure 3. Paint viscosity too high 3. Thin the paint properly 4. Pressure of paint is too high 4. Properly reduce the pressure of the pressure feed paint 5. Paint nozzle too large 5. Replace the paint nozzle
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