Symptom | Possible Cause | Solution | ||
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Excessive over- | 1. | Fluid pressure too high. | 1. | Reduce fluid pressure. |
spray. | 2. | Gun is too far from surface. | 2. | Keep gun at recommended |
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| distance. |
| 3. | Spraying too fast. | 3. | Slow down and maintain |
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| consistent, even parallel |
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| stroke. |
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Unable to control | 1. | Pattern adjustment screw is | 1. | Clean or replace. |
spray fan. |
| not seating properly. |
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| 2. | Atomizing cap is loose. | 2. | Tighten atomizing cap. |
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Runs and sags. | 1. | Damaged seal. | 1. | Replace damaged seals. |
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Material leaks from | 1. | Cap not secure. | 1. | Tighten. |
cup. | 2. | Cup not tight on gun body. | 2. | Tighten. |
| 3. | Leaking from cap vent hole. | 3. | Hold gun upright do not tilt. |
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Material leaks from | 1. | Fluid tip loose. | 1. | Tighten. |
gun. | 2. | Dry or damaged seals. | 2. | Replace seals. |
| 3. | Excessive pressure. | 3. | Reduce pressure. |
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Thick dimpled finish | 1. | Holding gun too close to sur- | 1. | Spray at recommended dis- |
aka "Orange Peel." |
| face. |
| tance. |
| 2. | Inlet air pressure too low. | 2. | Check inlet air pressure. |
| 3. | Material not properly mixed. | 3. | Follow manufacturer's |
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| instructions. |
| 4. | Surface is dirty or oily. | 4. | More surface prep is |
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| required. |
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Dry Spray. | 1. | Inlet air pressure too high. | 1. | Lower inlet air pressure. |
| 2. | Gun too far from surface. | 2. | Keep gun at recommended |
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| distance. |
| 3. | Gun stroke too fast. | 3. | Slow down and maintain |
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| consistent even parallel |
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| stroke. |
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Gun leaks from | 1. | Debris will not let the needle | 1. Clean or replace both. | |
fluid tip. |
| seat with the fluid tip. |
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Contaminated | 1. | Water or oil in the air line. | 1. | Install an |
paint. |
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| 2. | Replace air line. |
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Model H7669 HVLP Spray Gun |
