"> Caterpillar MaK 6L M34DF
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Caterpillar MaK

6L M34DF

The Caterpillar MaK 6L M34DF is a medium-speed, six‑cylinder inline dual‑fuel main engine delivering about 3 MW at 720–750 rpm, capable of running on LNG, HFO or MGO with real‑time combustion monitoring.

Caterpillar MaK 6L M34DF
3060.0 kW
Power

Engine Specifications

6
Cylinders
340 mm
Bore
460 mm
Stroke

Components & Design

Component data being added…

Technical Data

Power per Zylinder 500 kW/Zyl @ 720–750 rpm (Diesel + Gas-Modus)
Brennstoffverbrauch 188 g/kWh
Fußabdruck Identisch mit M32C
Feuchtluft-Schlupf Minimal (Technologie für Reduktion implementiert)
Verbrennungsüberwachung Real-time combustion monitoring mit Zylinderdruck-Feedback
Flexibles Nockenschaft-System Flexible Camshaft Technology (FCT) für variable Ventilöffnungszeiten
Klassifizierung DNV, Lloyd's Register zertifiziert
Emissionen (Diesel) IMO II / EPA Tier 2 Konformität
configuration L
rpm 720
fuel type LNG/HFO/MGO
technology Dual-Fuel Common Rail (LNG/HFO/MGO)
displacement l per cyl 41.8

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Common failures & inspection points

Pilot gasoline injection during gas operation: knocking tendency at unfavorable injection timing; pressure rise rate must be monitored to prevent overpressure conditions

Check injection valves for wear, check knock sensor functionality, test pilot injection pressures in gas mode

Methan-Schlupf im LNG-Betrieb: Obwohl MaK 'minimalen Methan-Schlupf' anpreist, können niedrige Teillast-Bedingungen zu unverbranntem Methan in der Abgasanlage f

Monitor exhaust emissions in gas mode at part load; check whether exhaust treatment systems (e.g. catalytic converters) are installed/functional

Flexible Camshaft Technology (FCT) – begrenzte Betriebserfahrung mit dieser neuen Technologie in der M34DF-Familie; potenzielle Nockenschaftmechanismus-Probleme

Inspect camshaft mechanism for wear, valve clearances, discharge problems; check electronic control of FCT function

Engine block ventilation during dual-fuel operation: boil-off gas (BOG) can accumulate in crankcase when operating in gas mode; increased explosion risk

Prüfe Belüftungsverfahren gemäß Wartungsvorschriften; überprüfe, dass Stickstoff-Spüleinrichtungen installiert/verfügbar sind; überprüfe Sicherheitsvorschriften im Maschinenraum-Handbuch

Turbocharger wear: high gas flow rates in LNG mode can lead to turbocharger sooting and compressor wear; wear intensity dependent on

Monitor turbocharger speed and compressor pressure; conduct regular turbocharger inspections (water and chemical cleaning); check bearing clearances and seals

Type-general inspection and maintenance points for this equipment category — not model-specific.

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Equipment Model #66532 · ✓ still in production