Main Engine 4-Stroke · Main Engines (4-Stroke)
The ABC Anglo Belgian 6L6DZC is a medium‑speed, four‑stroke inline‑six diesel main engine delivering 1 680 kW at 1 000 rpm, designed for dual‑fuel operation with HFO or MGO.
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| Fuel Injector Overhaul | 2,000 - 4,000 hours |
|---|---|
| Exhaust Valve Overhaul (inspection/grinding/replacement) | 4,000 - 8,000 hours |
| Piston Overhaul (inspection/ring replacement) | 8,000 - 12,000 hours |
| Fuel Injection Pump Overhaul | 8,000 - 16,000 hours |
| Turbocharger Minor Overhaul (cleaning/bearing inspection) | 8,000 - 16,000 hours |
| Main & Connecting Rod Bearing Inspection | 12,000 - 24,000 hours |
| Cylinder Liner Inspection (measurement/cleaning) | 12,000 - 24,000 hours |
| Major Overhaul (top end) | 16,000 - 24,000 hours |
| Major Overhaul (bottom end) | 24,000 - 48,000 hours |
| Cylinder Liner Wear (max ovality/taper) | 0.6 - 0.8 mm |
|---|---|
| Piston Ring Groove Wear (axial clearance) | 0.15 - 0.25 mm (depending on ring position) |
| Crankshaft Deflection (max difference between readings) | 0.05 - 0.10 mm |
| Main Bearing Clearance | 0.15 - 0.25 mm |
| Connecting Rod Bearing Clearance | 0.15 - 0.25 mm |
| Turbocharger Rotor Axial Play | 0.10 - 0.20 mm (check manufacturer's specific data) |
| Turbocharger Rotor Radial Play | 0.20 - 0.40 mm (check manufacturer's specific data) |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
A class surveyor will typically focus on the overall structural integrity and operational safety of the engine. Key checks include: verification of engine logbooks and maintenance records (including oil analysis reports); functional testing of all safety devices (overspeed trip, low lube oil pressure shutdown, high cooling water temperature shutdown, oil mist detector); inspection of engine foundation bolts and chocking; crankshaft deflection measurements; integrity of high-pressure fuel lines and associated shielding; general condition of the engine, looking for excessive leaks, corrosion, or signs of distress; and ensuring compliance with MARPOL regulations regarding emissions and fuel oil management. Performance verification under load may also be requested.
Estimated lifetime: 40,000 - 80,000 hours (before major rebuild/replacement, with diligent maintenance)
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