Main Engine 4-Stroke · Main Engines (4-Stroke)
The Hanshin 6EL40 is a six-cylinder in-line medium-speed four-stroke trunk-piston marine diesel engine of the EL series from Hanshin Diesel Works, with a bore class of 400 mm. It is installed in the engine room as a propulsion main engine, normally driving a fixed- or controllable-pitch propeller through a reduction gearbox, and the same engine type is also used as a generator drive. Typical service is coastal cargo ships, short-sea tankers, ferries and fishing or work vessels.
| Valve clearance check | typically every 1,000-2,000 running hours or per the maker's manual |
|---|---|
| Fuel injector overhaul and testing | typically every 2,000-6,000 hours depending on fuel quality |
| Piston and liner inspection | typically every 8,000-16,000 hours, or earlier on poor fuel or lube oil quality |
| Turbocharger overhaul | per the maker's schedule, typically every 12,000-24,000 hours |
| Lube oil and filter change | per oil analysis and the maker's schedule |
| Crankshaft deflection check | at each major survey or dry-dock |
| Cylinder liner wear | reassess or renew when measured bore wear approaches the maker's stated limit - confirm against the manual rather than a generic figure |
|---|---|
| Piston ring wear and ring groove clearance | compare against the maker's stated new and maximum clearances for this engine |
| Bearing clearance | compare against the maker's stated new and maximum allowable clearance for this engine |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class typically reviews crankshaft deflection records, bearing and liner condition, turbocharger overhaul history, overspeed and shutdown tests and crankcase safety devices, and checks the engine's IMO NOx certificate.
Estimated lifetime: Medium-speed four-stroke engines of this class are generally designed for 20+ years of service and often well over 100,000 running hours in total, with periodic renewal of liners, rings, valves and bearings rather than whole-engine replacement
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