Spray pattern troubleshoot- ing, Spray pattern troubleshooting – HP GRACO OR PRO TI1681A User Manual
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Troubleshooting
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Spray Pattern Troubleshooting
Check all possible remedies in the Troubleshooting Chart before disassembling the gun.
Some spray pattern problems are caused by the improper balance between air and fluid.
Problem
Cause
Solution
Fluttering or spitting spray.
No fluid.
Refill supply.
Loose, dirty, damaged nozzle/seat.
Clean or replace nozzle, page 42.
Air in fluid supply.
Check fluid source. Refill.
Improper spray pattern.
Damaged nozzle or air cap.
Replace, page 42.
Fluid buildup on air cap or nozzle.
Clean. See page 29.
Fan air pressure too high.
Decrease.
Fluid too thin.
Increase viscosity.
Fluid pressure too low.
Increase.
Fan air pressure too low.
Increase.
Fluid too thick.
Reduce viscosity.
Too much fluid.
Decrease flow.
Streaks.
Did not apply 50% overlap.
Overlap strokes 50%.
Dirty or damaged air cap.
Clean or replace, page 42.