Gun Operation Troubleshooting Chart - Graco PRO AA4000 Instructions Manual

GUN OPERATION TROUBLESHOOTING CHART

PROBLEM
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.
CAUSE
Air valve not seating properly.
Air stem packing too tight.
Loose or worn fluid seat.
Loose spray tip.
Insufficient air pressure.
Using too large of a spray tip.
Fluid poorly mixed or filtered.
Improper thinner being used.
Too much air pressure.
Fluid thinned too much.
Fluid low.
Broken fluid needle shaft.
Dirty or clogged spray tip.
Damaged spray tip.
Exhaust air flow insufficient or not directed
properly.
Improper distance between gun and
work piece.
SOLUTION
Clean, service. See page 21.
Loosen packing. See page 21.
Tighten or replace fluid seat and/or
electrode. See page 16.
Tighten spray tip.
Increase, use least air pressure
needed for good results.
Use a smaller size spray tip.
Remix or refilter fluid.
Use proper thinner.
Reduce,use least air pressure
needed for good results.
Properly thin fluid.
Check, add if necessary.
Replace needle.
Clean spray tip. See page 10.
Check, replace spray tip. See page 9.
Check for proper CFM, check baffles,
and direction of air flow.
Adjust distance to 203–305 mm
(8–12 in.).