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| Basic Troubleshooting |
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Problem | Cause | Solution |
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Pump does not prime. | Prime/Spray Valve is in SPRAY posi- | Turn Prime/Spray Valve to PRIME |
| tion. | 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 immersed |
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| in fluid. |
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| Pump was not primed with flushing | Remove suction tube from paint. |
| fluid. | Prime pump with water or |
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| Operation manual 312001. |
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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, see Operation manual |
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| 312001. |
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| AutoPrime may need replacement. |
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| Turn power switch ON and listen for |
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| “tap” in pump. If you do not hear |
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| “tap”, AutoPrime is damaged. Take |
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| sprayer to Graco/MAGNUM autho- |
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| rized service center. |
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| Inlet valve check ball or seat is dirty | Remove inlet fitting. Clean or replace |
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| 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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| outlet valve with a 3/4 in. socket. |
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| Remove and clean assembly. |
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| X5 and X7: Remove outlet fitting and |
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| clean outlet check ball. |
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| Suction tube is leaking. | Check suction tube for cracks and |
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| cuts. Make sure suction tube clamp is |
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| on hose. Replace suction tube if |
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| cracked or damaged. |
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12 | 312667B |
