9LM46DF
The MaK 9LM46DF is a medium‑speed, 9‑cylinder, dual‑fuel (LNG/HFO) trunk‑piston main engine delivering up to 5 940 kW at ~600 rpm, designed for low NOx emissions and fuel flexibility.
Engine Specifications
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Verify functional relief valve systems on fuel gas manifolds and exhaust; check valve set pressure calibration annually
Inspect crankshaft bearing thermoelectric voltage via Caterpillar Bearing Condition Monitoring System; examine bearing shells for lead precipitation and surface wear patterns
Measure cylinder liner wear with inside micrometer; inspect piston ring grooves for cracks; perform borescope inspection of turbocharger turbine for blade erosion or damage
Test LNG regulator pressure response and heater thermostat setpoint; inspect heat exchanger for blockages; verify glycol system circulation and temperature control
Type-general inspection and maintenance points for this equipment category — not model-specific.
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