"> MaK (Caterpillar) 7LM32E-GS-50Hz
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MaK (Caterpillar)

7LM32E-GS-50Hz

The MaK 7LM32E‑GS‑50Hz is a medium‑speed, 7‑cylinder diesel generator set delivering up to 3 325 kW (4 156 kVA) at a constant 750 rpm, designed for high‑power auxiliary applications on large vessels.

MaK (Caterpillar) 7LM32E-GS-50Hz
3500.0 kW
Power

Engine Specifications

7
Cylinders
320 mm
Bore
480 mm
Stroke
4-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

Bohrung 320 mm
Hub 460 mm (M32E), 480 mm (M32C)
Hub-Bohr-Verhaeltnis 1.4375 (M32E), 1.5 (M32C)
Hubraum pro Zyl. 37 l/Zyl. (M32E)
Leistung/Zyl. M32E ~550 kW/cyl. at 720-750 rpm
SFOC M32E ~190-210 g/kWh (Standard); Mit Part Load Kit bis 24 g/kWh Einsparung möglich
Drehzahl 720/750 rpm (konstante Drehzahl)
Emissionen IMO Tier II / EPA Tier 2 konform
Brennstoffflexibilität HFO, MGO, LS-Diesel
Wartungsintervalle Klassenführend; Zahnriemen/Ventile 10000h; Kolbenringe 20000h
power kw 3500
rpm 750
fuel type HFO/MDO
configuration L
genset kw 3325
genset kva 4156
frequency hz 50

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Common failures & inspection points

Seized piston rings due to carbon deposits in ring groove

Visual inspection of piston/grooves for coking; check oil consumption trend (>0.3%); exhaust color (blue smoke with ring seizure)

Charge exchange/scavenge air problems possible with older M32C series

Check scavenge air pressure lines for contamination/leaks; monitor compression ratio (compression test)

Turbocharger corrosion (salt water environment, seawater cooling without protective coating possible on older engines)

Visual inspection of turbocharger for rust spots, check bearing clearance; monitor lubrication pressure/oil contamination

Fuel injection system: wear of nozzles, valve lift timing (load-dependent via rocker arm)

Check fuel lines for dripping leaks; observe injection signs (black smoke, starting difficulties); visually inspect pressure lines at test pressure every 500 h

Piston cooling and cylinder liner wear during long-term operation (>50,000 h without overhaul)

Measure cylinder bore wear (plug gauge, >0.5 mm radial critical); piston clearance (0.3-0.8 mm); oil quality and wear metal analysis (Fe, Cu, Sn)

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

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Equipment Model #125544 · ✓ still in production