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MAN Generator (PrimeServ)

6-L21/31 GenSet

Auxiliary Engine (Generator Set) · Auxiliary Engines

Technical data from manufacturer or class sources · not yet verified by a person​‍​⁠​‌‌‌‍‌‍⁠​⁠‌‌⁠​‍​
1,320 kWPower
6Cylinders
210 mmBore
310 mmStroke

MAN Generator (PrimeServ) 6-L21/31 GenSet — Common Rail, 6 cyl × 210mm bore, 1000 rpm, MGO/HFO, 1320 kW.

Specifications

Technical data.reference — unverified

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ConfigurationL
Speed (rpm)1000
Fuel TypeMGO/HFO
TechnologyCommon Rail
Power (kW)1320
Inspection

Inspector Detail ✓ verified

Common issues

  • Fuel system leaks and contamination due to high-pressure common rail system
  • Excessive cylinder liner wear caused by low lubrication oil quality or incorrect clearance
  • Turbocharger fouling and failure from inadequate maintenance or poor exhaust gas quality
  • Crankshaft bearing wear due to misalignment or insufficient lubrication
  • Exhaust valve seat wear and damage from overheating or poor maintenance
  • Fuel injector coking and malfunction from poor fuel quality or inadequate maintenance
  • Lubrication oil cooler leaks and corrosion from seawater ingress or poor maintenance

Inspection checklist

  • Cylinder head and valve condition
  • Cylinder liner and piston ring wear
  • Crankshaft and camshaft bearing condition
  • Turbocharger and exhaust system condition
  • Fuel system and injector condition
  • Lubrication oil quality and cooler condition
  • Cooling system condition and leaks
  • Electrical system and control panel condition
  • Vibration and noise levels during operation

Service intervals

oil_change400-600 hours
fuel_filter_change1000-1500 hours
air_filter_change500-1000 hours
coolant_change2000-3000 hours
injector_overhaul6000-8000 hours

Typical wear limits

cylinder_liner0.5-1.0 mm wear limit
piston_ring0.5-1.5 mm wear limit
crankshaft_bearing0.1-0.5 mm wear limit
camshaft_bearing0.1-0.5 mm wear limit

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Fuel injectors
  • Cylinder liners and piston rings
  • Crankshaft and camshaft bearings
  • Turbocharger and exhaust system components
  • Lubrication oil cooler and heat exchanger components
  • Electrical system and control panel components
  • Cylinder head and valve components

Safety

  • High-pressure fuel system leaks and risk of fire
  • Rotating machinery and entanglement hazards
  • Electrical shock from faulty electrical systems
  • Scalding from hot surfaces and fluids
  • Toxic exhaust gas emissions and ventilation requirements

Class survey

Class surveyor typically checks for compliance with classification society rules and regulations, including verification of maintenance records, inspection of critical components, and review of safety procedures and documentation

Estimated lifetime: 20000-30000 hours

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