Troubleshooting
Troubleshooting
Relieve pressure before servicing. See Typical
Installation, page 8.
Problem | Cause | Solution |
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Pump will not run, or stops. | Air line valve shut off. | Open valve. |
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| Clogged fluid line or spray gun. | Clear, service. Do not allow fluid to |
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| setup in the pump and lines. |
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| Stuck or damaged pump air valve. | Service pump. Use filtered air. |
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Pump runs erratically. | Clogged suction line or inlet strainer. | Clear. |
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Pump runs too fast. | Exhausted fluid supply. | Refill fluid supply and prime sprayer. |
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Pump cycles at stall or fails to hold | Worn check valves or | Service pump. |
pressure at stall. |
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Audible air leak. | Worn air valve. | Service pump. |
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Air bubbles in fluid. | Loose suction line. | Tighten. Use a compatible liquid |
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| thread sealant or PTFE tape on con- |
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| nections. |
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| Ruptured diaphragm. | Service pump. |
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Poor finish or irregular pattern. | Incorrect fluid or air pressure at gun. | See gun manual; read fluid manufac- |
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| turer’s recommendations. Use fluid |
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| regulator. |
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| Fluid is too thick or too thin. | Thin or thicken fluid; read fluid manu- |
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| facturer’s recommendations. |
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| Dirty, worn, or damaged spray gun. | Service gun. |
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| Fluid is settling out. | Order Part No. 245081 Agitator Kit. |
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312473B | 13 |
