Main Engine 4-Stroke · Main Engines (4-Stroke)
The MAN 7LL48/60 is a medium‑speed, inline‑seven cylinder, four‑stroke diesel main engine delivering about 8 400 kW at 514 rpm, designed for flexible fuel use (MGO/HFO) and high reliability.
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| oil_change | 1000-1500 hours |
|---|---|
| fuel_filter_change | 250-500 hours |
| air_filter_change | 500-1000 hours |
| cylinder_liner_overhaul | 12000-18000 hours |
| main_bearing_overhaul | 20000-30000 hours |
| cylinder_liner | 0.5-1.0 mm wear limit |
|---|---|
| piston_ring | 0.5-1.0 mm wear limit |
| main_bearing | 0.1-0.5 mm wear limit |
| crankshaft | 0.1-0.5 mm wear limit |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyor typically checks for compliance with classification society rules and regulations, including verification of maintenance records, inspection of critical components, and review of safety procedures
Estimated lifetime: 30000-40000 hours
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