Troubleshooting - 3M 07 Manual Del Usuario

Troubleshooting

Problem
Bad Spray Pattern
Blistering
Fish Eyes
Heavy Middle Pattern
Intermittent Pulsating Spray
Insufficient Fluid Flow
Coarse or Lumpy Surface
Mottled Looking Surface
No Paint Flow
Orange Peel
Overspray is Excessive
Pin-holing, Solvent Pops
Paint Leak
Cause
Air cap or nozzle clogged
Bent fluid needle
Moisture on surface
Wrong solvent
Coats not compatible
Insufficient dry time
Surface too cold
Air contamination
Silicone contamination
Too much cup pressure
Not enough atomizing pressure
Worn or loose packing
Low fluid in cup or pot
Fluid nozzle too small
Dirt or dust on surface
Material is contaminated
Coating too thin
Coats too wet
Improper spray technique
Clogged fluid nozzle
Loss of air pressure
Loss of fluid pressure
Clogged air passage
Clogged check valve
Paint drying too fast
Spray gun too far from target
Viscosity too high
Gun too far from target
Too much atomizing air
for coating being sprayed
Trapped solvent
Improper solvent
System contaminated
Wrong needle size
Damaged-worn needle
Loose fluid nozzle
Worn/loose packing nut
Needle not closing
Tilted spray gun
18
Remedy
Clean with appropriate solvent
Replace fluid needle
Clean surface
Check solvent
Check material compatibility
Longer dry time
Warm surface
Add air filtration
Clean surface with solvent
Reduce fluid pressure
Increase atomizing pressure
Tighten or replace
Add fluid
Use larger needle/nozzle
Tack wipe before spray
Change or strain
Use less thinner
Use less thinner
Hold spray gun parallel to work
Clean fluid nozzle
Check hose, cup gasket
Out of paint
Clean with solvent
Replace check valve
Use proper solvent
6-8 (160-200 mm) inches is ideal
Reduce with solvent
6-8 (160-200 mm) inches is ideal
Reduce atomizing air
Apply lighter coats
Check coating manufacturer
Clean all parts
Replace
Replace
Tighten or replace
Tighten or replace
Packing too tight
Broken or missing needle spring
Dried paint on needle
Do not tilt while spraying
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