Graco 3A2495C User Manual
Troubleshooting
Gun Operation Troubleshooting
Problem
Cause
Solution
Atomizing air pressure too high.
Close atomizing air valve part way,
or decrease air pressure as low
as possible; minimum 45 psi (0.32
MPa, 3.2 bar) needed at gun for
full voltage.
Excessive spray fog.
Fluid too thin.
Increase viscosity or increase fluid
flow rate.
Atomizing air pressure too low.
Open atomizing air valve more or
increase gun air inlet pressure;
use lowest air pressure necessary.
Spray tip is too large.
Use smaller tip. See
.
Poorly mixed or filtered fluid.
Remix or refilter fluid.
“Orange Peel” finish.
Fluid too thick.
Reduce viscosity.
Fluid leaks from the fluid packing
area.
Worn fluid needle packings or rod. See
.
Air leaks from the front of the gun. Air valve is not seating properly.
See
.
Worn or damaged fluid needle ball. See
.
Worn fluid seat housing.
See
.
Loose spray tip.
Tighten retaining ring.
Fluid leakage from the front of the
gun.
Damaged tip seal.
See
.
Low fluid supply.
Add fluid if necessary.
Damaged spray tip.
Replace.
Dirty or clogged spray tip.
Clean.
See
.
Gun does not spray.
Damaged fluid needle.
See
.
Dirty air cap.
Damaged or plugged air cap.
Clean air cap. See
.
Poor grounding.
See
.
Excessive paint wrap back to
operator.
Incorrect distance from gun to part. Should be 8–12 in. (200–300 mm).
36
3A2495C