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| Troubleshooting | |
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Problem | Cause | Solution | |
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Material runs out of bottom of sprayer | RotoFlex HD Pump worn out | Replace hose. | |
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| Loose fittings | Check and retighten all fittings. | |
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No air from compressor | Gun air valve closed | Open gun air valve. | |
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| Gun needle plugged | Clean needle and retry. | |
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| Lines not connected | Check all quick disconnect connec- | |
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| tions to gun and hoses. | |
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| Damaged hose | Replace hose. | |
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| Worn compressor | Service compressor. Contact a quali- | |
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| fied Graco Service Center. | |
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Speed of application too slow | Material too thick | Thin material. | |
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| Nozzle too small | Change nozzles to a larger size. See | |
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| Operation Manual, Recommended | |
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| Nozzle Selection Chart, page 20. | |
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Speed of application too slow (cont.) | Flow control set too low | Increase flow control setting | |
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| Plugged or dirty gun | Relieve Pressure, page 7. Clean | |
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| gun. | |
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| Kinked hose | Unkink hose. | |
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| Gun fluid flow adjustment set too low | Increase flow adjustment with flow | |
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| adjustment nut. | |
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Intermittent flow/sputtering or air in | Hopper connection not tight | Check gasket. TIghten connection. | |
material |
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Debris in system | Clean | ||
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Air quick disconnect does not stay | Dirty or corroded fitting | Clean thoroughly. Soak in oil. Apply a | |
connected. |
| few drops of light oil. | |
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Gun will not shut off | Worn nozzle or needle. | Relieve Pressure, page 7. Replace | |
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| worn parts. | |
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| Debris in needle passage | Relieve Pressure, page 7. Clean. | |
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Fluid leaking at Flow Adjustment Nut | Damaged seal. | Relieve Pressure, page 7. Replace | |
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| seal. | |
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Needle adjustment won’t adjust | Dirty threads | Clean threads | |
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| Nozzle not on gun | Put nozzle on gun | |
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| Flow nut set to maximum adjustment | Turn flow nut adjustment the other | |
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| way | |
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28 | 310645H |
