DeVilbiss SB-2-001-J Troubleshooting Manual page 9

CONDITION
Jerky or fluttering spray
(continued)
Unable to get round spray Fan adjustment screw not seating
Will not spray
Starved spray pattern
Excessive overspray
Excessive fog
Paint bubbles in cup
Fluid leaking or dripping
from cup lid
SB-2-001-J (7/2015)
CAUSE
Suction Feed Only
Material too heavy.
Air vent in cup lid clogged.
Loose, damaged or dirty lid.
Fluid tube resting on cup bottom.
Damaged gasket behind fluid tip.
properly.
Air cap retaining ring loose.
No air pressure at gun.
Internal mix or pressure feed air cap
and tip used with suction feed.
Fluid pressure too low with internal
mix cap and pressure tank.
Fluid needle adjusting screw not open
enough.
Fluid too heavy for suction or
gravity feed.
Inadequate material flow.
Low atomization air pressure
(suction and gravity feed).
Too much atomization air pressure
Gun too far from work surface.
Improper stroking (arcing, gun motion
too fast).
Too much, or too fast-drying thinner.
Too much atomization air pressure.
Fluid tip not tight.
Cup lid loose.
Dirty cup or lid.
Cracked cup or lid.
9 / 12
CORRECTION
Thin or replace.
Clear vent passage.
Tighten, replace or clean coupling
nut.
Tighten or shorten.
Replace gasket.
Clean or replace.
Tighten.
Check air supply and air lines.
Change to proper suction feed air
cap and tip.
Increase fluid pressure at tank.
Open fluid needle adjusting screw.
Thin material or change to pressure
feed.
Back fluid adjusting screw out to
first thread, or increase fluid
pressure at tank. Clear cup vent.
Increase air pressure and re-
balance gun.
Reduce pressure.
Adjust to proper distance.
Move at moderate pace, parallel
to work surface.
Remix properly.
Reduce pressure.
Tighten.
Push in or replace.
Clean.
Replace cup and lid.