TROUBLESHOOTING
PROBLEM
Right or left
heavy spray
pattern
Top or bottom
heavy spray
pattern
Split spray
pattern
Center
heavy spray
pattern
Sputtering
spray
Fluid leaking from
packing nut
Air leaking from air cap
without pulling trigger
Excessive overspray
Will not spray
POSSIBLE CAUSE
1. Holes in left or right side of
the air cap are plugged
2. Dirt on left or right side of
fluid tip
1. Dried material at top or
bottom of fluid tip
2. Loose air cap or dirty seat
3. Air cap plugged
1. Fan pattern open too far
2. Fluid adjustment turned in
too far
3. Atomization air too high
1. Fan adjustment partially
closed
2. Material too thick
3. Atomization pressure too low
1. Material level too low
2. Container tipped too far
3. Loose fluid inlet connection
4. Loose or damaged fluid
tip/seat
5. Dry or loose fluid needle
packing nut
6. Air vent clogged
1. Packing nut loose
2. Packing worn or dry
1. Sticking air valve stem
2. Contaminate on air valve
or seat
3. Worn or damaged air valve
or seat
4. Broken air valve spring
5. Bent valve stem
1. Too high atomization
pressure
2. Too far from work surface
3. Improper stroking (arcing,
gun motion too fast)
1. No pressure in gun
2. Fluid control not open
enough
3. Fluid too heavy
13
CORRECTIVE ACTION
1. Clean using only a non-metallic pick
2. Clean
1. Clean
2. Clean and tighten
3. Clean using only a non-metallic pick
1. Partially close the pattern adjustment
2. Open fluid adjustment
3. Reduce atomization air pressure
1. Open fan pattern adjustment
2. Thin to proper viscosity
3. Increase atomization pressure
1. Refill
2. Hold more upright
3. Tighten
4. Adjust or replace
5. Lubricate and or tighten
6. Clear vent hole
1. Tighten, but do not restrict, needle
2. Replace or lubricate (non-silicone oil)
1. Lubricate
2. Clean
3. Replace
4. Replace
5. Replace
1. Reduce pressure
2. Adjust to proper distance
3. Move at moderate pace, parallel to
surface
1. Check air lines
2. Open fluid control
3. Thin fluid or change to pressure feed
system