Gun Operation Troubleshooting Chart - Graco A Series Instructions-Parts List Manual

GUN OPERATION TROUBLESHOOTING CHART

PROBLEM
Leakage from fluid pack-
ing nut.
Air leakage from front of
gun.
Fluid leakage from front
of gun.
"Orange Peel" finish.
Excessive spray fog.
No fluid sprays from gun.
Equipment covered with
fluid.
Equipment covered with
fluid.
CAUSE
Loose packing nut (27).
Worn needle packing (6).
Air valve not seating properly.
Air stem packing too tight.
Electrode (56) worn or damaged.
Worn fluid seat.
Fluid packing (6) too tight.
Loose fluid nozzle (19).
Fluid adjusting screw (54) not
set correctly.
Insufficient air pressure.
Fluid poorly mixed or filtered.
Improper thinner being used.
Too much air pressure.
Fluid thinned too much.
Fluid low.
Damaged air cap (17).
Dirty or clogged fluid nozzle (19).
Damaged fluid nozzle (19).
Exhaust air flow insufficient
or not directed properly.
Equipment closer to ionizing
nozzle than object being sprayed.
Misalignment between air cap
and fluid nozzle.
SOLUTION
Tighten.
Replace needle packing.
Clean, service.
Loosen packing.
Replace electrode.
Replace fluid nozzle (19) and/or
electrode (56).
Lubricate packing and adjust packing
nut (27).
Tighten fluid nozzle.
Adjust screw.
Increase, use least air pressure
needed for good results.
Remix or refilter fluid.
Use proper thinner.
Reduce,use least air pressure
needed for good results.
Properly thin fluid.
Check, add if necessary.
Replace air cap.
Clean fluid nozzle.
Check, replace fluid nozzle.
Check for proper CFM, check
baffles and direction of air flow.
Mount gun closer to target.
Remove and clean air cap and fluid
nozzle as described in Maintenance
Section under Clean the Air Cap and
Fluid Nozzle, then reinstall them.