SPRAY PATTERN TROUBLESHOOTING CHART 
WARNING
Installing and servicing this equipment requires access to parts which may cause electric shock or other serious bodily injury if the work is not performed properly. Do not install or service this equipment unless you are trained and qualified.
To reduce the risk of serious bodily injury, including splashing fluid or solvent in the eyes or on the skin, always follow the Pressure Relief Procedure Warning on page 9 before checking, adjusting, cleaning or repairing the gun or any part of the system. Disconnect the fluid hose from the gun.
NOTE: Check all possible remedies in the Troubleshooting Charts before disassembling the gun.
PROBLEM: | CAUSE | SOLUTION |
IMPROPER SPRAY |
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PATTERN |
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Fluttering or spitting | Insufficient fluid supply. | Adjust fluid regulator or fill fluid tank. |
spray | Loose fluid nozzle or damaged fluid | Tighten or replace fluid nozzle |
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| nozzle taper seat. | See page 10. |
| Dirt between fluid nozzle, taper seat | Clean. See page 11. |
| and body. |
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| Loose or cracked coupler at fluid inlet. | Tighten or repair. |
| Loose fluid tube in cup or tank. | Tighten. |
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| Fluid build±up on air cap; partially | Clean with soft implement or |
| clogged horn holes. Full air pressure | submerge in suitable solvent and wipe |
| from clean horn hole forces fan pattern | clean. See page 11. |
| toward clogged end. |
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| Damaged fluid nozzle or air cap holes. | Replace damaged part. See page 10. |
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| Fluid build±up on the perimeter of fluid | Remove obstruction. Never use wire |
| nozzle orifice, or partially clogged fluid | or hard instruments. See page 11. |
| nozzle orifice. |
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| Too high atomization air pressure. | Reduce air pressure or adjust air |
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| adjusting valve. |
| Fluid too thin. | Regulate fluid viscosity. |
| Not enough fluid pressure. | Increase fluid pressure. |
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| Low atomization air pressure. | Increase air pressure. |
| Fluid too thick. | Regulate fluid viscosity. |
| Too much fluid. | Reduce fluid flow. Reduce fluid |
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| pressure on pressure feed guns and/ |
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| or adjust fluid adjusting screw until |
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| proper pattern is obtained. |
Streaks | Last coat of fluid applied too wet. | Apply drier finish with multiple |
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| strokes. |
| Too much air pressure. | Use least air pressure necessary. |
| Insufficient air pressure. | Increase air pressure. |
| Non±uniform spray pattern. | Clean or replace air cap. |
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| See page 11. |
NOTE: Some improper patterns are caused by the improper balance between air and fluid.
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