What is the maintenance cycle for a fire-fighting pump?

1. Daily (or each shift)
Visually inspect the pump room for cleanliness and water retention.
Check the power indicator, fault light, and water level light on the control cabinet for normal operation.
Touch the motor housing to check for a temperature rise, ensuring it is not too hot.
Record the static pressure gauge reading and compare it with the previous day's reading. Immediately investigate for leaks if any abnormal pressure drop occurs.
2. Weekly
Perform a 5–10 minute local/remote jog test run to observe current and pressure stability.
Hand-turn the motor coupling 2–3 turns to confirm there is no binding or unusual noise.
Check valves, check valves, and pressure relief valves for smooth opening and closing and leak-free operation.
3. Monthly
Simulate a fire alarm trigger:
– Trigger any fire hydrant button or pressure switch and record the time from the signal being issued until the pump reaches rated pressure (≤55 seconds for acceptable).
Backup power supply transfer test: After a mains power failure, the diesel pump or backup power supply should take over within 15 seconds. Clean the filter and inspect the water intake for debris.
Add grease or oil to the valve screw, coupling, and bearing seat.

IV. Quarterly
Perform a water test on the terminal water test device: Measure flow and pressure to confirm that the system's worst-case scenario meets the design values.

Inspect the vacuum and pressure gauges, verifying that the error is ≤±2.5%.

Check the trip pressure of the safety relief valve and ensure that there is no leakage upon reseating.

Clean and tighten the motor terminals and the interior of the control cabinet.

V. Annually
Complete a complete system test: Automatic fire alarm → Pump start → Pipeline pressure → Water flow indicator → Fire department feedback, completing the entire process in one go.

Disassemble the pump and inspect: Impeller wear, seal ring clearance, and bearing play. Replace if any of these exceed the specified limits.

Replace the lubricating oil, diesel filter, and engine oil filter (for diesel pumps).

Repaint, reapply rust-proof paint, and repaint nameplates and labels.