Pump Maintenance Checklist: Daily, Monthly, Annual Tasks

A pump that costs ₹50,000 today, if maintained, will run reliably for 10–15 years. Without maintenance, it fails in 18 months — costing 5–10× more in downtime, energy, and replacements. The good news: preventive maintenance is simple and the tasks divide neatly into daily, monthly, and annual buckets. This checklist gives you the practical schedule.

1. Daily Checks (5 Minutes)

For mission-critical pumps running 24/7, do these at the start of every shift:

• Vibration: Touch the bearing housing. Excessive vibration or unusual smoothness changes are early warnings. Document any change.
• Temperature: Feel bearing housings — should be hand-warm (under 60°C). Anything hot to touch suggests bearing failure, misalignment, or lubricant issues.
• Sound: Listen for changes. Gravel-like noise → cavitation. Whining → bearing wear. Grinding → mechanical contact.
• Pressure gauges: Discharge pressure stable. Erratic readings → cavitation or air ingress.
• Leakage: Mechanical seal or gland should have minimal drip (gland-packed pumps allow few drops per minute; mechanical seals should be dry).
• Motor current: Compare against last week's normal — increased current suggests increased load or impeller wear.

2. Weekly Tasks (15 Minutes)

• Clean dust and grime off motor cooling fins (TEFC motors run hotter when dust-blocked)
• Check coupling guard — ensure it's in place and secure
• Verify drain line from gland is clear
• Inspect mounting bolts for looseness (especially after first 4 weeks of new pump)
• Check level in oil-lubricated bearings (top up with same grade oil if needed)

3. Monthly Maintenance (30 Minutes)

• Vibration analysis: If you have a handheld vibration analyser, log overall vibration (mm/s RMS) on each bearing. Trend it against history.
• Re-grease bearings: Grease-lubricated bearings need a small charge (typically 5–10 grams) at monthly intervals. Over-greasing is worse than no greasing.
• Inspect gland packing: Tighten or replace if leakage exceeds spec.
• Strainer cleaning: Pull and clean the suction strainer.
• Visual coupling inspection: Look for rubber/jaw wear, missing inserts.
• Pump pressure & flow logging: If you have meters, log the duty point and compare to design curve.
• Motor IR test: Megger test of motor winding (typically >100 MΩ for HV motors, >10 MΩ for LV).

4. Quarterly Tasks

• Mechanical seal flush line check — flow and pressure within spec
• Calibrate pressure gauges
• Inspect baseplate grout and foundation bolts
• Check alignment between pump and motor (laser or dial gauge)
• Inspect anti-vibration mounts if fitted

5. Annual Overhaul (4-8 Hours Down)

• Complete disassembly: Remove pump from baseplate (for major motors and high-criticality pumps; smaller pumps may skip this)
• Bearing replacement: Replace all bearings as a set, regardless of apparent condition
• Mechanical seal inspection: Replace if showing wear; mechanical seals are wear items
• Impeller inspection: Look for cavitation pitting (low-pressure side), wear ring clearance (replace if exceeding 1 mm), balance check
• Casing inspection: Check volute throat for wear, gasket surfaces
• Coupling overhaul: Replace elastomer inserts, re-lubricate gear couplings
• Realignment: After reassembly, laser-align to <0.05 mm
• Motor overhaul: Bearings replaced, varnish refresh (if shop allows), IR and surge test
• Painting: Touch up exterior paint to prevent corrosion

6. Spare Parts to Stock

To minimise downtime, keep these on the shelf for each pump model in service:

• Mechanical seal assembly (or gland packing)
• Bearings (drive end and non-drive end)
• Wear ring(s)
• Casing gasket and gasket sheet stock
• Coupling elastomer / jaw set
• Impeller (for critical pumps)

7. Documentation

Maintain a logbook for each pump containing: original commissioning data, performance curve, baseline vibration and temperature, alignment records, parts replaced and dates, and any abnormal events. This pays off massively during troubleshooting and when planning replacement.

Bombay Engineering Syndicate supports pump maintenance with genuine Crompton spares, mechanical seal kits, bearings, and impellers from our Mumbai and Ahmedabad warehouses. We also coordinate field service for major overhauls of larger pumps. Contact us for spare parts orders, maintenance contracts, and pump performance assessments.