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TROUBLESHOOTING
CONDITION
Heavy top or
bottom pattern
Heavy right or left side pattern
Heavy center pattern
Split spray pattern
Jerky or fluttering spray
Unable to get round spray
Will not spray
Fluid leaking from packing nut
Dripping from fluid tip
*Most common problem.
SB-2-301-V (7/2014)
CAUSE
Horn holes plugged.
Obstruction on top or bottom of fluid tip.
Cap and/or tip seat dirty.
Left or right side horn holes plugged.
Dirt on left or right side of fluid tip.
Remedies for the top-heavy, bottom-heavy, right-heavy and left-heavy patterns:
1) Determine if the obstruction is on the air cap or the fluid tip. Do this by making a test spray
pattern. Then, rotate the cap one-half turn and spray another pattern. If the defect is inverted,
obstruction is on the air cap. Clean the air cap as previously instructed.
2) If the defect is not inverted, it is on the fluid tip. Check for a fine burr on the edge of the
fluid tip. Remove with #600 wet or dry sand paper.
3) Check for dried paint just inside the opening. Remove paint by washing with solvent.
Too much material.
Material too thick.
Not enough material.
*Loose or damaged fluid tip/seat.
Insufficient fluid in cup or pressure tank.
Gun (with cup) tipped at excessive angle.
Obstructed fluid passage or hose.
Loose or cracked fluid tube in cup or tank.
Too heavy fluid for suction feed. Dry or
worn packing (14) or loose packing nut (15).
Fan adjustment screw not seating 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 feed.
Packing nut loose.
Packing worn or dry
Dry packing.
Sluggish needle.
Tight packing nut.
Sprayhead misaligned, causing needle to bind.
5 / 8
CORRECTION
Clean. Ream with non-metallic point.
Clean.
Clean.
Clean. Ream with non-metallic point.
Clean.
Reduce fluid flow on suction guns. Reduce
fluid pressure on pressure feed guns .
Thin to proper consistency.
Reduce air pressure or increase fluid flow by
turning fluid needle adjusting screw counter
clockwise on suction feed, increase fluid
pressure on pressure feed guns.
Tighten or replace.
Fill cup or tank.
Do not tip excessively or rotate fluid tube.
Clean.
Tighten or replace.
Change to pressure feed.
Lubricate or replace. Tighten.
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.
Tighten, do not bind needle.
Replace or lubricate.
Lubricate. See "Preventive Maintenance".
Lubricate. See "Preventive Maintenance".
Adjust. See " Preventive Maintenance".
Tap all around sprayhead with wooden
mallet and retighten locking bolt.
EN
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