DeVilbiss COBRA 3C - Page 15

15 © 2014 Finishing Brands UK Ltd.
Possible Problems in Operation (cont.)
Fluid Starved spray
pattern.
Inadequate material flow.
Increase Fluid Flow.
Change to larger fluid nozzle size.
Check hose for blockage.
Excessive overspray.
Air pressure too high.
Gun too far from work surface.
Reduce air pressure.
Adjust to correct target 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.
Increase Fluid Flow or use larger nozzle
size.
Runs and sags.
Too much material flow.
Material too thin.
Motion too slow.
Reduce Fluid Flow or change to smaller
fluid nozzle and fluid needle size.
Mix correctly or apply light coats.
Increase Gun Traverse speed.
Leakages
Fluid leaking from
Detection hole.
Packing or Fluid Needle 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 leaking between
the Spray Gun and the
Manifold.
O-Rings damaged or missing.
Torx screw not tight.
Replace O-Rings using kit SPA-412-K.
Tighten Torx screw or replace using kit
SPA-411-K.
Assembly Faults
Spray Gun is loose
when assembled onto
Manifold.
Torx screw not tight.
Tighten Torx screw 1.8-2.0 Nm (1.3-1.5
lbf.ft) or replace using kit SPA-411-K.