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| Troubleshooting | |
Gun Operation Troubleshooting |
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Problem | Cause | Solution |
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Excessive spray fog. | Atomizing air pressure too high. | Close restrictor valve some, or |
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| decrease air pressure as low as pos- |
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| sible; minimum 40 psi (0.28 MPa, 2.8 |
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| bar) needed at gun for full voltage. |
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| Fluid too thin. | Increase viscosity. |
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“Orange Peel” finish. | Atomizing air pressure too low. | Open atomizing air valve more or |
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| increase gun air inlet pressure; use |
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| lowest air pressure necessary. |
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| Poorly mixed or filtered fluid. | Remix or refilter fluid. |
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| Fluid too thick. | Reduce viscosity. |
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Fluid leaks from the fluid packing | Worn packings or rod. | Replace packings or rod; see page |
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| 28. |
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Air leaks from the front of the gun | Air valve (21) is not seating properly. | Clean and service air valve; see |
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| page 33. |
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Fluid leakage from the front of the | Worn or damaged packing rod (26). | Replace; see page 28 |
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gun |
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| Worn fluid seat. | Replace fluid nozzle and/or electrode |
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| needle; see pages 25 to 26. |
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| Loose fluid nozzle (7). | Tighten; see page 25. |
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| Damaged nozzle | Replace; see page 25. |
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Gun does not spray | Low fluid supply. | Add fluid if necessary. |
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| Damaged air cap (9). | Replace; see page 25. |
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| Dirty or clogged fluid nozzle (7). | Clean; see page 25. |
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| Damaged fluid nozzle (7). | Replace; see page 25. |
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| Damaged fluid adjustment valve (25). | Replace; see page 33. |
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Dirty air cap | Misaligned air cap (9) and fluid noz- | Clean fluid buildup off air cap and |
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| zle (7). | fluid nozzle seat; see page 25. |
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309291P | 21 |