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Spray Pattern Troubleshooting
312900C 25
Spray Pattern Troubleshooting
NOTE: Check all possible remedies in the Troubleshoot-
ing Chart before disassembling the gun.
NOTE: Some spray pattern problems are caused by the
improper balance between air and fluid.
Electric Shock Hazard
Installing and servicing this equipment requires
access to parts which may cause an electric shock or
other serious injury if the work is not performed prop-
erly. Do not install or repair this equipment unless you
are trained and qualified.
Pressurized Equipment Hazard
To reduce the risk of an injury, follow the Pressure
Relief procedure on page 19 whenever you are
instructed to relieve the pressure.
Problem Cause Solution
Fluttering or spitting spray. No fluid. Refill supply.
Loose, dirty, damaged nozzle/seat. Clean or replace nozzle, page 28.
Air in fluid supply. Check fluid source. Refill.
Improper spray pattern. Damaged nozzle or air cap. Replace, page 28.
Fluid buildup on air cap or nozzle. See Maintenance on page 20.
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 28.