6DE-18

Häufige Probleme

• Injector fouling leading to poor combustion, high exhaust temperatures, and increased fuel consumption.
• Exhaust valve wear (pitting, burning, seat recession) due to high thermal loads and corrosive combustion products, often exacerbated by HFO use.
• Turbocharger fouling on both compressor and turbine sides, reducing efficiency and leading to surging or high exhaust back pressure.
• Lube oil cooler leakage, typically from seawater side corrosion, leading to oil contamination or loss of cooling.
• Piston ring wear or breakage, causing blow-by, increased lube oil consumption, and reduced compression.
• Bearing wear (main and connecting rod) indicated by abnormal noise, vibration, or metal particles in lube oil.
• Fuel pump element wear, leading to inconsistent fuel delivery and engine imbalance.
• Cooling water system blockages or leaks, causing localized overheating or reduced engine performance.

Prüfliste

• Verify engine room cleanliness and absence of oil, fuel, or water leakages around the engine.
• Check all engine operating parameters: exhaust gas temperatures per cylinder (ensure balance), lube oil pressure/temperature, cooling water pressure/temperature, fuel oil pressure/temperature, turbocharger RPM/boost pressure. Look for deviations from normal operating ranges.
• Inspect fuel injection system for leaks (especially high-pressure lines) and listen for abnormal injector noises.
• Visually inspect turbocharger for signs of oil leakage, unusual noise, or vibration. Check air filter condition.
• Examine exhaust manifold and insulation for hot spots or leaks.
• Check lube oil filters and fuel oil filters for excessive differential pressure, indicating clogging.
• Inspect cooling water system for leaks, proper pressure, and condition of heat exchangers (visually if accessible).
• Verify proper operation of engine safety devices (overspeed trip, low lube oil pressure alarm/shutdown, high cooling water temperature alarm/shutdown) through functional checks if permissible.
• Check crankcase breather for excessive blow-by, indicating potential piston ring wear.
• Listen for any abnormal knocking, rattling, or grinding noises from the engine.

Wartungsintervalle

Typische Verschleißgrenzen

Die Bereiche sind für diese Bauklasse typisch. Maßgeblich sind stets die Herstellerunterlagen zur jeweiligen Seriennummer.

Kritische Ersatzteile

• Complete set of fuel injectors or critical components (nozzles, plungers).
• At least one complete exhaust valve assembly (valve, seat, spring, rotators).
• Piston rings for one cylinder.
• Main bearing and connecting rod bearing shells for one cylinder.
• Fuel pump elements and delivery valves.
• Full set of engine filters (fuel, lube oil, air).
• Turbocharger bearing cartridge or repair kit.
• Assorted gaskets and O-rings for common maintenance tasks (cylinder head, cooler covers).

Sicherheit

• High-pressure fuel oil leaks: Risk of fire due to spray onto hot surfaces. Ensure proper shielding and immediate repair.
• Hot surfaces: Exhaust manifold, turbocharger, and uninsulated pipes pose severe burn hazards. Verify insulation integrity.
• Rotating machinery: Exposed flywheels, shaft couplings, and fan belts present entanglement risks. Ensure guards are in place.
• Pressurized systems: Starting air, cooling water, and fuel systems operate under pressure. Improper handling can lead to injury.
• Crankcase explosion: Ensure crankcase relief doors are clear and functional. Monitor for excessive blow-by and abnormal crankcase pressure.

Klassenbesichtigung

A class surveyor will typically focus on the engine's overall condition, maintenance records, and compliance with statutory requirements. Key checks include: verification of engine logbook entries (running hours, maintenance performed, fuel/lube oil consumption), inspection of safety devices (overspeed trip test, low lube oil pressure alarm/shutdown, high cooling water temperature alarm/shutdown), general visual inspection for leaks, corrosion, and cleanliness. They will check the integrity of high-pressure fuel oil piping and shielding, crankcase relief doors, and exhaust gas system insulation. Depending on the survey cycle (e.g., intermediate or special survey), they may require opening of specific components such as cylinder heads, pistons, or bearings for internal inspection, often based on running hours or condition monitoring data. Lube oil analysis reports and fuel oil bunkering records are also scrutinized.

Geschätzte Lebensdauer: 60,000 - 80,000 hours before first major overhaul (e.g., crankshaft out inspection), with a total design life exceeding 150,000 hours with proper maintenance.