AIRLESS APPLICATION
TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE CAUSE SUGGESTED CORRECTION
Runs and sags 1. Too close to surface 1. Spray at proper distance, 18-36" inches
2. Improper stroke speed 2. Stroke to slow. Move gun faster across surface
3. Spray motion stopped before releasing trigger 3. Continue spray motion after trigger release
4. Trigger pulled prior to starting spray motion 4. Begin spray motion prior to pulling the trigger
5. Paint viscosity too thin 5. Paint over-reduced. Use new material
6. Paint & air temperature too cold 6. Warm paint to 70ºF. Air temperature 60º-100ºF
7. Humidity too high 7. No higher than 50% humidity
8. Too much paint output 8. Correct spray tip size. Spray tip worn. Pressure adjustment
Insufficient coverage 1. Too far from surface 1. Spray at correct distance, 18-36"
2. Paint stroke too fast 2. Slow down paint stroke
3. Insufficient paint delivery 3. Wrong tip size and/or fan width. Adjust pressure
Streaks, uneven appearance 1. Uneven application 1. Make sure horizontal and · Uneven appearance vertical strokes are overlapped by 50%
2· Pattern does not match 2. Not full coat coverage
Pattern too small compared to standard 1. Tip size too small 1 & 2. Check tip size and compared to standard pump
2. Pressure too high 1 & 2. Check tip size and compared to standard pump
3. Damaged paint 3. Replace paint
Pattern too large compared to standard 1. Pressure too low 1 & 2. Check tip size and pressure
2. Tip size too large 1 & 2. Check tip size and pressure
3. Spattercoat application not fullcoat coverage 3. Re-spray wall overlapping strokes by 50%
Webbed or stringy pattern 1. Angling or fanning spraygun 1. Hold gun at 90º angle to surface. Stay perpendicular to substrate being sprayed
2. Incorrect pressure settings 2. Adjust pressure for respective equipment and tip size
Multicolor flecks break down. Very small fleck size. Darker shade 1. Filters or strainers in fluid line and/or gun 1. Remove all filters from equipment
2. Incorrect pressure settings 2. Adjust pressure until proper fleck size and pattern is achieved or change tip size
3. Wrong tip size 3 & 4. Re-evaluate equipment and tip size
4. Wrong equipment and/or accessories 3 & 4. Re-evaluate equipment and tip size
5. Hose dirty or clogged 5. Use dedicated hose
6. Defective paint---frozen 6. Replace
7. Paint too thick 7. Adjust with water
Poor spray pattern
·Tails
·Heavy edges		 1. Spray tip worn 1. Replace
2. Incorrect pressure adjustment for tip size selected 2 & 3. Read recommended pressure adjustments for equipment and re-evaluate tip selection pump size
3. Incorrect spray tip and/or pump size 2 & 3. Read recommended pressure adjustments for equipment and re-evaluate tip selection pump size
Spray gun won’t spray, or low output from gun 1. Paint supply empty 1. Refill system
2. Spray tip clogged 2. Refer to equipment manual for tip cleaning procedure
3. Incorrect pressure adjustment 3. Check pressure gauge
Paint spitting or globbing 1. Low on paint 1. Refill system
2. Worn or oversized spray tip 2. Replace tip
3. Incorrect pressure settings for tip size selected 3. Refer to manual for prssure setting guidelines
4. Spray tip clogged 4. Re-evaluate tip selected. Refer to equipment manual or tip cleaning procedures
5. Defective paint 5. Replace
Spray pattern expanding and contracting surge 1. Pulsating fluid delivery 1. Wrong pump. Use electronically controlled piston pumps or diaphram pumps. Wrong tip size
2. Suction leak 2. Reduce number of guns pump. Inspect for siphon hose leak
3. Hose too short 3. Use longer hose
Round spray pattern 1. Worn tip 1. Replace tip
2. Fluid too heavy for tip 2. Replace tip. Thin paint (5% maximum)
MULTICOLOR SPECIALTIES INC. 800/536-5456 Order: 800/362-6617