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Troubleshooting
Gun Operation Troubleshooting
Problem Cause Solution
Fluid leakage from the fluid packing
area
The needle packings or shaft are worn. Replace the packings or shaft; see page
28.
The packing nut is loose Tighten the packing nut; see page 28.
Air leakage from the front of the gun
The air valve is not seating properly. Clean and service the air valve; see page
31.
The air valve o-ring is sticking. Lubricate the o-ring; see page 31.
Fluid leakage from the front of the gun
The needle is worn or damaged. Replace the needle; see page 28.
The fluid seat is worn. Replace the fluid nozzle and/or electrode
needle; see pages 25 to 28.
The fluid packing is too tight. Lubricate and adjust the packing nut; see
page 28.
The resistor stud is loose. Tighten the resistor stud; see page 24.
The fluid nozzle is loose. Tighten the fluid nozzle; see page 24.
The resistor stud o-ring is damaged. Replace the o-ring; see page 24.
“Orange Peel” finish
The air pressure is insufficient for good
atomization.
Increase the air cap air pressure by open-
ing the atomizing air valve more or in-
creasing the gun air inlet pressure; use
the least air pressure needed for good
results.
The fluid is poorly mixed or filtered. Remix or refilter the fluid.
An improper thinner is being used. Use the proper thinner.
Excessive spray fog
The air pressure is too high. Reduce the air cap air pressure by closing
the atomizing air valve more or decreas-
ing the gun air inlet pressure; use the
least air pressure needed for good results.
Do not reduce below minimum pressure
needed for full voltage. See page 15.
The fluid is thinned too much. Properly thin the fluid.
No fluid sprays from the gun The fluid supply is low. Check the fluid supply; add fluid if
necessary.
The air cap is damaged. Replace the air cap. See page 24.
The fluid nozzle is dirty or clogged. Clean the fluid nozzle; see page 17.
The fluid nozzle is damaged. Replace the fluid nozzle; see page 24.
The fluid adjustment valve is damaged. Replace the o-ring; see page 32.
The equipment is covered with fluid
The exhaust air flow is insufficient or not
directed properly.
Check for the proper CFM; check the
baffles and direction of the air flow.
The distance between the gun and work-
piece is incorrect.
Adjust the spraying distance to 8 to 12
inches (203 to 305 mm).
The air cap is dirty
Fluid Nozzle
The air cap and fluid nozzle are mis-
aligned.
ALIGNED MISALIGNED
Air Cap
Check the air cap and fluid nozzle seat for
fluid buildup.
Clean or replace parts as needed; see
page 17 or 24.