Gun Operation Troubleshooting - Graco Pro Xp 3A2494D Instructions Manual

Troubleshooting
Gun Operation Operation Troubleshooting Troubleshooting
Gun Gun Operation Troubleshooting
Problem Problem Problem
Excessive spray fog.
"Orange Peel" finish.
Fluid leaks from the fluid packing
area.
Air leaks from the front of the gun.
Fluid leakage from the front of the
gun.
Gun does not spray.
Dirty air cap.
Excessive paint wrap back to
operator.
34
Cause Cause Cause
Atomizing air pressure too high.
Fluid too thin, or fluid flow is too
low.
Atomizing air pressure too low.
Poorly mixed or filtered fluid.
Fluid too thick.
Worn packings or rod.
Air valve is not seating properly.
Worn or damaged fluid packing
rod or electrode.
Worn fluid nozzle seat.
Loose fluid nozzle.
Damaged nozzle o-ring.
Low fluid supply.
Dirty or clogged fluid nozzle.
Closed or damaged fluid
adjustment valve.
Misaligned air cap and fluid nozzle. Clean fluid buildup off air cap
Poor grounding.
Incorrect distance from gun to part. Should be 8–12 in. (200–300 mm).
Solution Solution Solution
Close restrictor 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.
Increase viscosity or increase fluid
flow rate.
Open atomizing air valve more or
increase gun air inlet pressure;
use lowest air pressure necessary.
Remix or refilter fluid.
Reduce viscosity.
See Packing Rod Repair, page
See Air Valve Repair, page
Replace packing rod (2e)
or electrode (3). See
Packing Rod Repair, page 40
Electrode Replacement, page
Replace nozzle (4). See
Air Cap and Nozzle Replacement,
page 38.
Tighten.
See Air Cap and Nozzle
Replacement, page 38.
Add fluid if necessary.
Clean. See
Clean the Gun Daily, page
Open valve, or see
ES On-Off and Fluid Adjustment
Valve Repair, page 49.
and fluid nozzle seat. See
Clean the Gun Daily, page
See Grounding, page 21.
40.
50.
or
39.
29.
29.
3A2494D