"> MAN Energy Solutions MAN 9L32/44CR
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MAN Energy Solutions

MAN 9L32/44CR

The MAN 9L32/44CR is a 9‑cylinder inline low‑speed marine diesel engine delivering up to ~600 kW per cylinder (≈5.4 MW total) with common‑rail fuel injection, designed for flexible HFO/MGO operation and IMO Tier II emissions compliance.

MAN Energy Solutions MAN 9L32/44CR
5040.0 kW
Power

Engine Specifications

9
Cylinders
320 mm
Bore
440 mm
Stroke

Components & Design

Component data being added…

Technical Data

Bohrung x Hub 320 mm x 440 mm
Hubraum pro Zylinder 35,4 dm³
Leistung pro Zylinder (MCR, 750 rpm) 600 kW (L-Reihe), 560 kW (V-Reihe)
MEP (Mean Effective Pressure) 27,1 bar (Durchschnitt); L-Reihe: 29,4-29,9 bar
Mittlere Kolbengeschwindigkeit 11 m/s
Spezifischer Treibstoffverbrauch (SFOC) @ 85% MCR 172 g/kWh (L-Serie); 171 g/kWh (V-Serie)
Gewicht 6L32/44CR 39,5 Tonnen
Gewicht 10L32/44CR 58,0 Tonnen
Gewicht 12V32/44CR 70 Tonnen
Gewicht 20V32/44CR 104 Tonnen
Common Rail Druck 1600 bar
Emissionsstandards IMO Tier II (Serie); IMO Tier III mit SCR
Zylinderabstand (Twin Engine) 2500 mm (L32/44); 4000 mm (V32/44)
configuration L
rpm 720
fuel type HFO/MGO
technology Common Rail (CR)
displacement l per cyl 35.4

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Common failures & inspection points

Turbocharger fouling from soot deposits: fouling and blockage from carbon deposits is the main cause of turbocharger surging. Contaminat

Regular cleaning (every 200-250 operating hours): water wash (routine), dry cleaning (stubborn deposits), chemical cleaning (overhaul with OEM-approved agents)

Cylinder head cover oil leaks: gasket wear (approx. 70% of all failures) due to embrittlement after approx. 5 years of operation. Also misalignment of cover (3 m

Visual inspection for oil stains around cylinder head; check for correct assembly and gasket aging; check oil level (overfill increases pressure)

Fuel injection system common rail: injectors can exhibit wear, coking and O-ring failure under high pressure load (1600 bar). Single solenoid ve

Inspectors should check for fuel leaks around injection lines; periodic injector testing and pressure testing recommended; overhaul per operating instructions

Connecting rod bearing wear and scuffing: insufficient lubrication under high pressure can lead to adhesive wear and microscopic welding. Excessive

Visual inspection for scratches, discoloration, embrittlement at accessible bearing points; oil pressure monitoring; inspections per service intervals

Cylinder liner and piston wear: wear is normally operational; critical are cold corrosion (when operating temperature not sufficiently reached) and the

Periodic cylinder cavitation testing; inspections during cooler operating phases; thermal monitoring of exhaust gas temperatures

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

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Equipment Model #66682 · ✓ still in production