"> MAN Energy Solutions 7L28/33D-GS-60Hz
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MAN Energy Solutions

7L28/33D-GS-60Hz

The MAN 7L28/33D‑GS-60Hz is a 7‑cylinder V‑type, four‑stroke auxiliary diesel engine coupled to an integrated generator set delivering approx. 2 240 kW (2 128 kW net) at 60 Hz for shipboard hotel and cargo power.

MAN Energy Solutions 7L28/33D-GS-60Hz
2240.0 kW
Power

Engine Specifications

7
Cylinders
280 mm
Bore
330 mm
Stroke
4-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

Swept volume per cylinder 20.3 dm³ (20.3 liters)
Specific Fuel Oil Consumption (SFOC) at 85% MCR 183.5 g/kWh
Power per cylinder at MCR 455 kW per cylinder at 1,000 rpm
Mean Effective Pressure (MEP) Not explicitly specified in sources - requires datasheet access
Compression ratio 16.5:1 (typical for MAN four-stroke marine diesel)
Sequential turbocharging MAN TCA turbochargers with automatic second TC cutoff at part load
Firing order Four-stroke cycle (4 strokes per complete cycle)
Engine weight Not publicly detailed in accessible sources
power kw 2240
rpm 900
fuel type MDO
configuration L
genset kw 2128
genset kva 2660
frequency hz 60

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Common failures & inspection points

Seawater cooling system strainer clogging and raw water pump impeller failure

Inspect strainers weekly in dirty water operations; replace impeller annually per maintenance schedule

Turbocharger fouling from sodium/vanadium compounds (V2O5 deposits) and carbon/ash buildup, especially at low-load operation

Inspect turbine blade condition visually; measure boost pressure performance curves; check exhaust gas temperature signature

Fuel injector needle valve and seat wear causing poor atomization, fuel dribbling, carbon trumpet formation, and nozzle hole blockage

Monitor fuel injection timing via CAN interface; inspect injector spray pattern at full load; check return fuel temperature and volume

Exhaust valve carbon/ash deposits (vanadium pentoxide V2O5 + sulfate compounds) reducing valve seat sealing and thermal transfer

Monitor exhaust valve temperature via thermocouples; inspect valve seat color and surface finish during major overhaul; adjust fuel treatment additives

Cylinder liner wear from poor piston-liner alignment or abrasive particulate contamination, especially at mid-stroke regions

Perform borescope inspection at 500-1000 hour intervals; measure liner wear with gauge; inspect oil analysis for Si/Fe particulates and viscosity trends

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

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Equipment Model #124495 · ✓ still in production