
Troubleshooting
Problem | Cause | Remedy | |
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Bad Spray Pattern | Air cap or nozzle clogged | Clean with appropriate solvent | |
Bent fluid needle | Replace fluid needle | ||
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| Moisture on surface | Clean surface | |
| Wrong solvent | Check solvent | |
Blistering | Coats not compatible | Check material compatibility | |
| Insufficient dry time | Longer dry time | |
| Surface too cold | Warm surface | |
Fish Eyes | Air contamination | Add air filtration | |
Silicone contamination | Clean surface with solvent | ||
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Heavy Middle Pattern | Too much fluid pressure | Reduce fluid pressure | |
Not enough atomizing pressure | Increase atomizing pressure | ||
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Intermittent Pulsating Spray | Worn or loose packing | Tighten or replace | |
Low fluid pressure | Add fluid or increase fluid pressure | ||
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| Restriction in fluid line Blocked hose | Use 3/8” fluid hose Flush or replace hose | |
Insufficient Fluid Flow, Pressure Feed | Fluid nozzle too small | Use larger needle/nozzle | |
| Low fluid pressure | Increase fluid pressure | |
Coarse or Lumpy Surface | Dirt or dust on surface | Tack wipe before spray | |
Material is contaminated | Change or strain | ||
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| Coating too thin | Use less thinner | |
Mottled Looking Surface | Coats too wet | Use less thinner | |
| Improper spray technique | Ensure gun is parallel to work | |
| Clogged fluid nozzle | Clean fluid nozzle | |
| Loss of fluid pressure | Out of paint | |
No Paint Flow | Clogged air passage | Clean with solvent | |
| Restriction in mat’l hose | Flush with solvent | |
| Clogged check valve | Replace check valve | |
| Paint drying too fast | Use proper solvent | |
Orange Peel | Gun too far from target | ||
| Viscosity too high | Reduce with solvent | |
| Gun too far from target | ||
Overspray is Excessive | Too much atomizing air for coating being | Reduce atomizing air | |
| sprayed |
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| Trapped solvent | Apply lighter coats | |
Improper solvent | Check coating manufacturer | ||
| System contaminated | Clean all parts | |
| Wrong needle size | Replace | |
| Replace | ||
| Loose fluid nozzle | Tighten or replace | |
Paint Leak | Worn/loose packing nut | Tighten or replace | |
| Needle not closing | Packing too tight. Broken or missing needle | |
| spring. Dried paint on needle. | ||
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| Loose fluid fitting | Tighten or replace |
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