GPump and Motor Preventive Maintenance Schedule
Most pump failures announce themselves in the daily readings before they happen. A simple preventive schedule turns those readings into warnings instead of post-mortems.
The daily log
The operator’s daily log is the backbone of pump maintenance. Each run records the voltage across all three phases, the current drawn, the discharge or the hours run, and any abnormal noise, vibration or heating. A rising current at the same head, or a growing imbalance between the three phase currents, is an early sign of a developing fault long before the motor burns out.
Keeping that log consistently — and actually reading it, not just filling it — is what lets a supervisor spot a bearing going dry or a choked foot valve while it is still a cheap repair.
Monthly and annual tasks
Monthly tasks include checking and cleaning the panel and connections, testing the insulation resistance of the motor, checking the earthing, and inspecting the foot valve, strainer and delivery valve. Lubrication is topped up on the schedule the manufacturer specifies rather than when something squeals.
Annually, the pump is pulled and inspected for wear in the impeller and wear rings, the motor bearings are checked or replaced, and the whole set is re-aligned. Keeping the rating plate details, the spares list and these service dates in one place means a replacement or a spare can be ordered without stripping the pump first to find out what it is.
What should the daily pump log record?
Three-phase voltage and current, discharge or running hours, and any abnormal noise, vibration or heating. A rising current at the same head or a growing phase-current imbalance is an early warning of trouble.
What are the key periodic maintenance tasks?
Monthly: panel and connection cleaning, insulation-resistance and earthing checks, foot-valve and strainer inspection, scheduled lubrication. Annually: impeller and wear-ring inspection, bearing check/replacement and re-alignment.