TROUBLESHOOTING
24
AIR-POWERED GRAVITY-FEED SPRAY GUN KIT 058-9311-0
Pattern is not spread
uniformly
1. Paint has build up on air cap.
2. Fluid nozzle is dirty or worn.
1. Clean or replace air cap.
2. Clean or replace fluid nozzle.
Centre of pattern is
too narrow
1. Paint is too thin or not sufficient.
2. Atomization air pressure is too high.
1. Regulate paint viscosity.
2. Reduce air pressure.
Width of spray
pattern is too narrow
1. Paint is too thick.
2. Atomization air pressure is too low.
1. Regulate paint viscosity.
2. Increase air pressure.
Air leakage from air
cap when trigger is
not pressed
1. Air inlet valve or seat is contaminated.
2. Inlet valve stem is stuck.
3. Air inlet valve or seat is worn or
damaged.
4. Air inlet spring is broken.
5. Inlet valve stem is bent.
1. Lubricate the inlet valve stem.
2. Clean the air inlet valve or seat.
3. Replace air inlet valve or seat.
4. Replace air inlet spring.
5. Replace inlet valve stem.
Fluid leakage from
packing nut
1. Packing nut is loose.
2. Packing is worn or dry.
1. Tighten, but do not restrict the needle
movement.
2. Replace or lubricate (non-silicone oil).
Excessive overspray
1. Atomization pressure is too high.
2. Work surface is too far.
3. Improper stroking (arcing, gun motion
are too fast).
1. Reduce the air pressure.
2. Adjust to proper distance.
3. Move at moderate pace, parallel to work
surface.
PROBLEM POSSIBLE CAUSES SOLUTIONS
MC-OM-10
MC-OM-11
MC-OM-12