Trouble | Probable Cause and Remedy |
Pump will not turn | - Low pump temperature: check thermocouple and control loop for proper setting or operation. Allow sufficient heat-up time.
- Drive malfunction: verify that drive powered. Assure all alarm circuits are clear. Check drive motor current and speed settings. Check drive couplings.
- Process conditions changed: check process conditions for proper melt temperature, pressures, viscosities, and materials.
- Entrained particle: disassemble and clean pump. Replace any damaged parts.
- Possible internal damage: disassemble and clean pump. Replace any damaged parts. Consult factory.
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Excessive seal assembly leakage | - Worn lip seal: replace lip seals.
- Incorrect water flow: monitor and adjust water flow to provide correct sealing temperature.
- Clogged rheoseal channel: disassemble two-piece seal housing and inspect.
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Reduced pump efficiency | - Worn gear(s): replace worn gear(s).
- Worn bearings: replace worn bearings.
- Process conditions changed: consult factory for clearance recommendations on new process conditions.
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