Troubleshooting
PROBLEM
CAUSE
SOLUTION
Pump runs sluggishly. | Worn or damaged carriage | Service air valve. See page 18. |
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Pump runs erratically. | Clogged suction line or inlet strainer. | Clear. |
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| Sticking or leaking ball check | Disassemble and clean ball checks. |
| valves. | Replace worn parts. See page 16. |
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Pump runs too fast. | Exhausted fluid supply. | Refill fluid supply and prime pump. |
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Pump cycles at stall or fails to hold | Worn ball check valves. | Disassemble and clean ball checks. |
pressure at stall. |
| Replace worn parts. See page 16. |
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Audible air leak. | Worn air valve cup or plate. | Service air valve. See page 18. |
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Air exhausting from the mounting | Fluid covers are installed incorrectly. | Align mounting holes in fluid covers |
holes. |
| with holes in center housing. See |
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| page 14. |
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Fluid in the exhaust air. | Ruptured diaphragm. | Replace diaphragms. See page 17. |
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Air bubbles in fluid. | Loose suction line. | Tighten. Use a compatible liquid |
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| thread sealant on connections. |
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| Ruptured diaphragm. | Replace diaphragms. See page 17. |
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Poor finish or irregular spray pat- | Incorrect fluid or air pressure at gun. | See gun manual; read fluid |
tern. |
| manufacturer’s recommendations. |
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| Use fluid regulator. |
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| Fluid is too thin or too thick. | Adjust fluid viscosity; read fluid |
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| manufacturer’s recommendations. |
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| Dirty, worn, or damaged spray gun. | Service gun. |
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| Fluid is settling out. | Use agitator. Order Part No. 245081 |
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| Agitator Kit. |
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