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| Troubleshooting | |
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PROBLEM | CAUSE | SOLUTION |
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Leak in inlet or outlet sanitary fit- | Loose sanitary clamp. | Tighten clamp. |
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ting. |
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| Damaged or worn gasket. | Replace gasket. |
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| Misalignment of inlet/outlet hose or | Use flexible hoses at pump inlet |
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| pipe. | and outlet. |
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| Gasket does not seal. | Use a standard sanitary gasket of |
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| flexible material such as EPDM, |
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Fluid in exhaust air. | Diaphragm ruptured. | Replace. See page 21. |
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| Loose diaphragm plate. | Tighten or replace. See page 21. |
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Pump exhausts excessive air at | Worn air valve block, plate, pilot | Repair or replace. See page 16. |
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stall. | block, |
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| Worn shaft seals. | Replace. See page 21. |
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Pump leaks air externally. | Air valve cover is loose. | Tighten screws. See page 16. |
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| Air valve gasket or air cover gasket | Inspect; replace. See page 16. |
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| is damaged. |
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| Air cover clamps are loose | Tighten clamps. |
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Pump leaks fluid externally from | Loose manifolds, damaged seal | Tighten manifold clamps or replace |
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ball check valves. | between manifold and seat, dam- | seats or clamps (32). See page 19. |
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| aged gaskets. |
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Chattering. | Check balls not seating prop- | Reduce size/diameter of inlet line |
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| erly/cleanly due to imbalance | relative to outlet line. Outlet line |
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| between fluid inlet and outlet line | size should not exceed pump size. |
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| sizing. Noise is accentuated with |
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| light viscosity fluids. |
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310622L | 15 |
