Checklist
Monthly Pump Inspection Checklist
A monthly pump inspection checklist covering vibration, temperature, lubrication, seals, and alignment for centrifugal and positive displacement pumps.
4 min readUpdated July 2026
Vibration and Noise
- Measure vibration: Take vibration readings at the drive-end and non-drive-end bearings. Compare to baseline — investigate any increase above 50% of baseline.
- Listen for abnormal sounds: Use a stethoscope or ultrasonic detector. Grinding, clicking, or rumbling indicates bearing problems.
- Check for cavitation: Listen for the characteristic 'gravel' sound. If present, check suction pressure, NPSH, and strainer.
Temperature
- Bearing temperatures: Check bearing housing temperature — should be below 80°C (or 70°C for oil-lubricated). A 10°C rise above baseline indicates a problem.
- Motor temperature: Check motor frame temperature — should be below 80°C for most motors.
- Seal temperature: Check seal area — should be warm but not hot. Overheating indicates dry running or flush failure.
Lubrication
- Check oil level: Verify oil level in bearing housing is at the correct mark.
- Check oil condition: Look for discoloration, water, or particulate in the oil sight glass. Sample for analysis if needed.
- Grease if scheduled: Add grease per the lubrication schedule — do not over-grease.
- Check grease quantity: If using a grease gun, count the pumps. Too much grease causes overheating.
Seals and Packing
- Check for leakage: Inspect mechanical seal — should have no visible leakage (or only a very slight weep).
- Check packing: If the pump has packing, verify a small drip (10–20 drops/minute) — this cools and lubricates the packing.
- Check seal flush: Verify seal flush flow and pressure are correct. Clean the flush strainer if fitted.
Performance
- Check discharge pressure: Compare to baseline — a drop indicates wear or impeller damage.
- Check flow rate: Verify flow is within the expected range for the operating conditions.
- Check power consumption: If the pump has a power meter, compare to baseline — an increase indicates wear or increased friction.
General
- Check alignment: Verify coupling alignment — use a straight edge for rough check, dial indicators for precision.
- Check for leaks: Inspect all flanges, valves, and the casing for leaks.
- Clean the pump: Remove dust and dirt from the motor and bearing housing — dirt insulates and causes overheating.
- Record readings: Log all readings for trending.
How CHI can help
Ask CHI about monthly pump inspection tasks and to help interpret vibration readings. The CHI assistant can help you create custom checklists for your specific equipment, explain each inspection point, and flag items that need attention based on your equipment's condition.