Diesel fire pump engine maintenance: oil, fuel, and coolant
Maintain diesel fire pump engines with the listed engine’s oil, regular test runs, fuel and coolant care, and records that support your inspection program.
By Jeff Pittman, Independent AMSOIL Dealer · Updated
Diesel fire pump drivers are listed engines tested on a frequent schedule under NFPA 25. Use the oil and coolant the engine maker specifies, keep the fuel tank full and clean, and record each test run and service.
Use the listed engine’s requirements
Fire pump engines are listed assemblies. Follow the engine maker’s oil category, viscosity, capacity, and interval, and avoid changes that affect the listing.
Frequent test runs
NFPA 25 sets a frequent run schedule for diesel fire pumps. Each run is a chance to check oil pressure, coolant temperature, leaks, and fuel level.
Fuel and coolant
Fire pump fuel tanks are small and kept full; drain water and test the fuel periodically. Keep coolant at the maker’s specification and check the heater.
Records for inspectors
Log runs, oil changes, filter changes, and test results. Inspectors and insurers often review them.
Frequently asked questions
How often does a diesel fire pump need to run?
On the schedule set by NFPA 25 and your authority having jurisdiction; diesel drivers are tested frequently.
What oil goes in a fire pump engine?
The oil the listed engine’s maker specifies.
Does fire pump fuel need testing?
Periodic testing helps catch water and degradation in small, rarely refilled tanks.
General maintenance information. Always follow your vehicle or equipment manufacturer’s requirements and the current product data. Questions? Email [email protected].
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Confirm the oil category, viscosity, and approvals in the engine maker’s manual for each generator before ordering. These examples are not a match for a specific engine.
