"> WinGD 12X40DF
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WinGD

12X40DF

The WinGD 12X40DF is a 12‑cylinder, low‑speed (146 rpm) 2‑stroke crosshead main engine delivering about 12 360 kW and capable of running on LNG or HFO in dual‑fuel mode.

WinGD 12X40DF
12360.0 kW
Power

Engine Specifications

12
Cylinders
400 mm
Bore
1770 mm
Stroke
2-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

Bore X35-B: 350 mm; X40-B: 400 mm
Stroke X35-B: 1550 mm; X40-B: 1770 mm
Stroke/Bore Ratio 4.43 (both models)
Power Range X35-B: 2,450–6,960 kW; X40-B: 3,250–9,080 kW
RPM Range X35-B: 118–167 rpm; X40-B: 104–146 rpm
Mean Effective Pressure (MEP R1) X35-B: not verifiable; X40-B: 21 bar
SFOC (Specific Fuel Oil Consumption) X35-B: ~175.8 g/kWh; X40-B: ~176.8 g/kWh (Tier II, Vollast)
Fuel Type Marine Diesel (HFO/MDO) - Single-Fuel; X40DF-Variante: LNG Dual-Fuel
Fuel Injection System Electronically Controlled Common Rail mit Zeit-gesteuerte Einspritzung
Emissions Compliance IMO Tier II/Tier III (SCR-Nachrüstung für Tier III)
Production Status Legacy (Produktion beendet, technische Unterstützung aktiv)
power kw 12360
rpm 146
fuel type LNG/HFO (Dual-Fuel)
configuration L

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Common failures & inspection points

Cylinder liner scuffing: Local welding and wear between piston ring and liner inner surface caused by inadequate lubrication or oil film breakdown

Visual inspection of liner for scratches, micro-welding and discoloration; check local surface roughness; hone liner or replace if necessary

Piston crown and ring groove wear: Surface stress, wear and cracks in piston crown and ring grooves require thickness measurements

Use thickness gauge (e.g. Fischer Dualscope MP0); compare with reference values from OM; inspect piston crown for thermal discoloration, cracks and deposits

Fuel pressure anomalies and groove leakage: Excessive/insufficient pressure in common rail system and fuel leakage from injection lines

Check fuel pressure during operation (reference value at R1); monitor fuel return for leaks; observe inspection lines at injectors for leaks

Exhaust temperature irregularities with elevated gas concentration in piston underside: Asymmetrical or unexpected exhaust temperatures downstream of individual cyl

Perform continuous exhaust temperature monitoring per cylinder; initiate cylinder head inspections at temperature differences >30°C; check gas concentration in piston

Servo oil system leakage and FLV/fuel line tightness issues: pressure loss in servo hydraulic system and fuel leak at Fuel Line Valves

Monitor servo oil pressure and flow; visually inspect all fuel lines and valve connections and under pressure; monitor sight glasses

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

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Equipment Model #122879 · ✓ still in production