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GUN OPERATION TROUBLESHOOTING CHART
PROBLEM
CAUSE
SOLUTION
Leakage from fluid packing nut.
Loose packing nut (23).
Tighten.
Worn needle packing (4).
Replace.
Air leakage from front of gun.
Air valve not seating properly.
Clean, service.
Air bleed valve is open.
Check, adjust or close as required.
See Fig 2.
Fluid leakage from front of gun.
Resistor electrode worn or damaged.
Replace.
Worn fluid seat.
Replace fluid tip and/or resistor
electrode.
Fluid packing (4) too tight.
Lubricate and adjust.
Loose fluid tip (30).
Tighten.
Adjusting screw (39) not set correctly.
Adjust.
Cylinder air going into gun not completely
Turn off cylinder air.
shut off.
Fluid leaks from rear needle packing
Worn needle packing (4).
Replace packing.
nut or drain hole.
Worn needle shaft (61).
Replace worn needle shaft.
"Orange Peel" finish.
Insufficient air pressure.
Increase, use least air pressure need-
ed for good results.
Paint viscosity too high.
Thin paint or use larger fluid nozzle.
Fluid poorly mixed or filtered.
Remix or refilter fluid.
Improper thinner being used.
Use proper thinner.
Excessive spray fog.
Too much air pressure.
Reduce, use least air pressure needed
for good results.
Fluid thinned too much.
Properly thin fluid.
No fluid sprays from gun.
Fluid low.
Check, add if necessary.
Damaged air cap.
Replace air cap.
Dirty or clogged fluid tip.
Clean fluid tip.
Damaged fluid tip.
Check, replace fluid tip.
Air valve not actuating.
Check cylinder air, fluid needle pack-
ing (4), and needle. Replace parts as
necessary.
Damaged fluid needle.
Replace.
Equipment covered with fluid.
Exhaust air flow insufficient or not directed
Check for proper CFM, check baffles
properly.
and direction of air flow.
Equipment closer to ionizing tip than object
Mount gun closer to target.
being sprayed.
Dirty air cap.
Misalignment between air cap and fluid tip.
Remove and clean air cap and fluid
tip as described in the Operation Sec-
Aircap1
tion under To Clean or Change the
Air Cap and Fluid Tip (page 7).
Reinstall fluid tip finger tight. Using
Fluid Tip
•
the wrench supplied, tighten fluid tip
114 turn (torque to 1.1-1.4 N'm
(10-12 in-Ib)). Set locking pin to lock-
ed position. Reinstall air cap being
sure to tighten retaining nut until
Aligned
Misaligned
snug only; allowing air cap to turn
with resistance.
307-896
9
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