© 2012 Finishing Brands UK Ltd.
15
Troubleshooting Possible Problems in Operation (cont)
Starved spray pattern
Inadequate material flow
Blocked vent in Cup lid
Low atomisation air pressure
Wind fluid adjusting knob out or
change to larger fluid nozzle size
Clean lid and unblock vent
Increase air pressure and rebalance
gun.
Excessive overspray
Air pressure too high.
Gun too far from work surface.
Reduce air pressure.
Adjust to correct distance.
Dry spray
Air pressure too high.
Gun too far from work surface.
Gun motion too fast.
Fluid flow too low.
Reduce air pressure.
Adjust to correct distance.
Slow down.
Wind out needle adjusting screw or
use larger nozzle size.
Fluid leaking from
packing nut
Packing worn.
Replace.
Fluid leaking or dripping
from front of gun
Fluid nozzle or fluid needle worn or
damaged.
Foreign matter in fluid nozzle.
Fluid needle dirty or stuck in needle
packing
Wrong size fluid needle or fluid nozzle.
Replace fluid nozzle and fluid needle.
Clean.
Clean
Replace fluid nozzle and fluid needle.
Fluid dripping or leaking
from bottom of cup
Cup loose on gun.
Cup fluid inlet seat dirty.
Tighten
Clean.
Runs and sags
Too much material flow.
Material too thin.
Gun tilted on an angle, or gun motion
too slow.
Turn fluid adjusting knob clockwise
or switch to smaller fluid nozzle and
fluid needle size.
Mix correctly or apply light coats.
Hold gun at right angle to work and
adapt to correct gun technique.
