9
7. TROUBLESHOOTING
Problem
Possible Causes
Suggested Remedy
Spray size generally uneven
due to poor atomization.
1.Too much paint entering air
flow.
2. Insufficient air hitting paint
flow.
1.Decrease paint flow or reduce the nozzle to
the next size down.
2.Increase air flow on the spray gun's air control.
Intermittent spray.
1. Air is getting into the paint
circuit.
1.Tighten the nozzle up with the multi size
spanner.
2.Check the paint pot is not empty.
A lot of overspray.
1.Spray gun distance from
work piece.
2.Technique.
3. Atomization too high.
1. Maintain a distance of approx. 20cm.
2. Make sure you are not flicking the gun on the
leading or trailing edge.
3. Reduce air flow on the spray gun's air control.
Badly formed spray pattern.
1. Nozzle or air cap alignment.
2. Debris or dried paint
blocking air cap or nozzle.
3. Needle tip worn or damage.
1. Check that both are correctly seated.
2. Check and if necessary clean the air cap and
nozzle.
3. Replace needle assembly.
Lack of spray in the centre.
1.Not enough paint entering air
flow.
2.Too much air flow.
1. Increase paint flow or step up the
nozz\e to the next size.
2. Reduce air flow on the spray gun's
air control.
Uneven fan shape.
1. Air cap holes blocked on
one side.
2. Needle tip and air cap worn
or damaged nozzle.
1. Clean the air cap thoroughly.
2. Replace needle assembly.
Air or paint leaking.
1. Sticking trigger or needle
mechanism.
2. Loose or worn packing
washers.
1. Lubricate all moving parts,
2. Check tightness. If tight, repla
lubricate packing washers.
NOTE:
Any adjustments made to remedy a problem will alter the original test pattern results. Slight rebalancing
may be necessary.