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MAN ES Turbocharging

NA-L NA70/L

Turbocharger · Turbochargers

Technical data from manufacturer or class sources · not yet verified by a person​‍​‍⁠⁠​‍​​⁠​⁠​‍​​‌‌‍

MAN ES Turbocharging NA-L NA70/L — NA-L, 5000 kW max.

Specifications

Technical data.reference — unverified

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Frame SizeNA70/L
Power max (kW)5000
Inspection

Inspector Detail ✓ verified

Common issues

  • Compressor wheel fouling due to poor air filtration
  • Turbine blade erosion from high-temperature exhaust gases
  • Bearing wear and vibration caused by misalignment or imbalance
  • Oil leakage from turbocharger seals and gaskets
  • Carbon buildup on turbine and compressor components
  • Inadequate cooling of turbocharger components
  • Foreign object damage to compressor or turbine blades

Inspection checklist

  • Visual inspection of compressor and turbine blades for damage or fouling
  • Check turbocharger bearings for wear and vibration
  • Verify proper alignment and balancing of turbocharger
  • Inspect oil seals and gaskets for signs of leakage
  • Check compressor and turbine housing for signs of overheating
  • Verify proper function of turbocharger control systems
  • Inspect air filtration system for cleanliness and effectiveness
  • Check for signs of carbon buildup on turbocharger components
  • Verify proper cooling system function and temperature

Service intervals

major_overhaul25000 - 30000 hours
routine_maintenance1000 - 2000 hours
oil_change500 - 1000 hours

Typical wear limits

compressor_wheel10% reduction in diameter or 20% increase in vibration
turbine_blades10% reduction in length or 20% increase in vibration
bearings10% increase in vibration or 20% decrease in bearing clearance

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

Critical spares

  • Compressor wheel
  • Turbine blades
  • Bearing sets
  • Oil seals and gaskets
  • Control system components
  • Air filtration system components
  • Cooling system components

Safety

  • High-temperature exhaust gases
  • Rotating machinery hazards
  • Oil leakage and fire risk
  • Electrical shock from control systems

Class survey

Verify proper installation, maintenance, and operation of turbocharger, including control systems and cooling systems. Check for signs of overheating, oil leakage, or other damage. Verify compliance with manufacturer's recommendations and class society regulations.

Estimated lifetime: 40000 - 50000 hours

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