6EY18LW GenSet

Common issues

• Injector nozzle deposits leading to poor combustion and increased exhaust temperatures.
• Exhaust valve leakage/burning due to deposits, poor seating, or excessive operating hours.
• Charge-air cooler fouling, reducing engine efficiency and increasing thermal load.
• Main and crankpin bearing wear, often indicated by increased lube oil consumption or metal particles.
• Fuel pump plunger and barrel wear, affecting injection timing and fuel delivery.
• Turbocharger bearing wear or compressor/turbine fouling, leading to reduced boost pressure.
• Lube oil contamination or degradation, impacting engine component lifespan.
• Cooling water system leaks or heat exchanger fouling, causing elevated engine temperatures.

Inspection checklist

• Monitor exhaust temperature spread across cylinders (max deviation < +/- 30°C from average).
• Visually inspect fuel condition (clarity, presence of water/sediment) and check fuel filter differential pressure.
• Inspect charge-air cooler fins for fouling and cleanliness, both air and water sides.
• Check injector cooling lines for leaks and listen for abnormal injector knocking sounds.
• Verify lube oil pressure and temperature are within specified limits; check for abnormal consumption.
• Inspect cooling water system for leaks, proper pressure, and temperature regulation.
• Listen for abnormal engine noises (knocking, rattling, turbocharger whine).
• Check for fuel, lube oil, and cooling water leaks around the engine and associated piping.
• Verify generator output parameters (voltage, current, frequency) are stable under load.
• Inspect engine mounts for signs of wear or degradation, and check for excessive vibration.

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Injector nozzles (complete set or at least 2 per cylinder)
• Exhaust valve spindle and seat ring (at least 1 set per cylinder)
• Fuel pump plunger and barrel assembly (at least 1 set)
• Piston rings (one complete set per cylinder)
• Main and crankpin bearing shells (one complete set)
• Fuel, lube oil, and air filters (multiple sets)
• Various gaskets and O-rings for cylinder head and fuel system maintenance
• Turbocharger bearing cartridge or complete rotor assembly
• Start air valve

Safety

• High-pressure fuel line leaks can atomize fuel, posing a severe fire risk (spray fires).
• Hot surfaces (exhaust manifold, turbocharger) require proper insulation and guarding to prevent burns.
• Rotating machinery (flywheel, coupling, fan belts) must have guards in place to prevent entanglement.
• High voltage from the generator requires strict adherence to electrical safety procedures.
• Pressurized systems (cooling water, start air) can cause injury if components fail or are improperly handled.

Class survey

Class surveyors will typically check for operational functionality under load, including load acceptance and emergency stop. Verification of safety devices (overspeed trip, low lube oil pressure, high cooling water temperature, low start air pressure) and alarm system functionality is critical. The integrity of the fuel oil system (leakage, fire fighting arrangements) and exhaust gas system will be inspected. Generator insulation resistance and earth fault monitoring will be checked. Review of maintenance records, lube oil analysis reports, and running hours is standard. Visual inspection for leaks, corrosion, and general machinery condition is paramount. Crankshaft deflection readings may be requested if due or if concerns arise.