Troubleshooting
Problem | Cause | Solution |
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Pump does not prime. | Prime/Spray Valve is in SPRAY | Turn Prime/Spray Valve to PRIME |
| position. | position (pointing down). |
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| Inlet screen is clogged or suction | Clean debris off inlet screen and |
| tube is not immersed. | make sure suction tube is |
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| immersed in fluid. |
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| Pump was not primed with | Remove suction tube from paint. |
| flushing fluid. | Prime pump with water or |
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| 11. |
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| Inlet valve check ball is stuck. | Remove suction tube and place a |
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| pencil into the inlet section to dis- |
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| lodge the ball, allowing pump to |
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| prime properly. OR Power Flush |
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| sprayer, page 19. |
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| AutoPrime may need replace- |
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| ment. Turn power switch ON and |
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| listen for “tap” in pump. If you do |
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| not hear “tap”, AutoPrime is dam- |
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| aged. Take sprayer to Graco/MAG- |
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| NUM authorized service center. |
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| Inlet valve check ball or seat is | Remove inlet fitting. Clean or |
| dirty | replace ball and seat. |
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| Outlet valve check ball is stuck. | ProX7 and ProX9: Insert screw |
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| driver in slot and remove |
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| Unscrew outlet valve with a 3/4 in. |
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| socket. Remove and clean |
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| assembly. |
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| X5 and X7: Remove outlet fitting |
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| and clean outlet check ball. |
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| Suction tube is leaking. | Tighten suction tube connection. |
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| Inspect for cracks or vacuum |
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| leaks. |
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| Pump does not prime with fluid. | Remove suction tube from paint. |
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| Prime pump with water or sol- |
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| Fluids are viscous or sticky. | Some fluids may prime faster if |
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| the Power Switch is momentarily |
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| turned off so the pump can slow |
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| and stop. Repeat several times if |
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| necessary. |
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26 | 312001R |
