Main Engine 4-Stroke · Main Engines (4-Stroke)
The MAN 12PC2.6 is a 12‑cylinder V‑type high‑speed diesel engine delivering up to 9 000 kW at 520 rpm, featuring sequential turbocharging (STC) for superior part‑load efficiency.
| Injector service/renewal | typically every 4000-6000 running hours depending on fuel quality |
|---|---|
| Cylinder head/valve overhaul | typically every 8000-12000 running hours per MAN's maintenance schedule |
| Main/big-end bearing inspection | typically every 12000-16000 running hours or per condition monitoring |
| Lube oil analysis | every 250-500 running hours or per the vessel's PMS |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Main/big-end bearing clearance | medium/high-speed four-stroke engines of this class typically allow clearances in the order of 0.10-0.30 mm before renewal - confirm the exact figure against MAN's instruction manual for the 12PC2.6 |
|---|---|
| Cylinder liner wear/ovality | commonly monitored against a wear allowance in the order of 0.1-0.3 mm on engines of this bore class before renewal is considered - use MAN's own stated limit, not this generic figure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Prime movers in this power range are subject to periodical or continuous survey depending on enrolment. Class wants crankshaft deflection records, governor/overspeed trip test records and turbocharger overhaul documentation. IMO Tier II compliance must be supported by a valid EIAPP certificate and technical file on board.
Estimated lifetime: Time between overhauls (TBO) for major components on high-speed/medium-speed four-stroke engines of this class is generally in the 12000-24000 running-hour range depending on load profile and fuel quality - not a fixed universal number, follow MAN's maintenance schedule for the PA6B STC family.
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