4.0GENERAL TROUBLESHOOTING FOR ALL PUMPS
4.1Troubleshooting Chart
| LOW FLOW |
| MOTOR RUNS HOT OR STOPS |
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1. | Restrictions in inlet or discharge | 1. | Motor surface temperature up to |
2. | Foot valve operating improperly |
| 104°F (40°C) over ambient can |
3. | Air leak in inlet piping |
| occur. The motor will feel hot to the |
4. | Air leak in mechanical seal |
| touch. |
5. | Wrong installation of belt drive | 2. | Bad connection |
6. | Suction lift too high | 3. | Motor exceeded rated amp draw |
7. | Reverse rotation of pump shaft | 4. | Excessive ambient temperature |
8. | Pump not primed adequately | 5. | Heater size to small in motor heater |
9. | Inlet strainer/filter plugged. | 6. | Binding rotation in the pump shaft |
10. | Pump throttling valve on discharge | 7. | Bearings not adequately lubricated |
| closed (pump deadheaded) | 8. | Specific gravity or viscosity of liquid |
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| higher than design conditions |
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| 9. | Motor wired improperly |
| MOTOR DOES NOT RUN |
| LOW PRESSURE |
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1. | Blown fuse or tripped circuit breaker or | 1. | Pump not adequately primed |
| overload heater | 2. | Air leak in inlet piping |
2. | Motor to hot - allow to cool | 3. | Excessive flow |
3. | Motor voltage connection and line | 4. | Clogged suction line filter or screen |
| voltage different | 5. | Reverse rotation of pump shaft |
4. | Bad connection | 6. | Foot valve operating improperly |
5. | Motor wired improperly | 7. | Wrong ratio for belt drive |
6. | Wrong ratio for belt drive |
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| PUMP VIBRATION |
| PUMP LEAKING |
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1. | Misalignment of flexible coupling | 1. | Mechanical seal needs replacing |
2. | Bent pump shaft | 2. | |
3. | Improper mounting | 3. | Oil seals need replacing |
4. | Starved suction | 4. | Piping not sealed properly |
5. | Worn bearings |
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6. | Motor out of balance |
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7. | Operating beyond specified capacity |
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| range of the pump |
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