MET-WB 42WB
The Mitsubishi MET‑WB 42WB is a medium‑speed, axial‑flow turbocharger designed for four‑stroke diesel engines up to about 8 MW (≈8000 kW), providing high boost pressure and efficient exhaust gas energy recovery.
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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 seals and gaskets
- Carbon buildup on nozzle rings and turbine blades
- Inadequate cooling of the turbocharger components
- Incorrect fuel injection timing and pressure
Inspection checklist
- Visual inspection of compressor and turbine blades for damage or fouling
- Check bearing temperatures and vibration levels
- Inspect oil seals and gaskets for signs of leakage
- Verify proper alignment and balance of the turbocharger
- Check compressor inlet and outlet pressures
- Inspect turbine nozzle rings for carbon buildup
- Verify proper cooling system operation
- Check fuel injection system for proper timing and pressure
Service intervals
| major_overhaul | 30000 - 40000 hours |
| bearing_replacement | 20000 - 30000 hours |
| seal_replacement | 10000 - 20000 hours |
| compressor_blade_cleaning | 5000 - 10000 hours |
Typical wear limits
| compressor_blades | 10% of blade tip clearance |
| turbine_blades | 5% of blade tip clearance |
| bearings | 0.1 - 0.2 mm of radial 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
- Seal kits
- Nozzle rings
- Oil pumps and filters
- Gaskets and O-rings
Safety
- High-temperature exhaust gases
- Rotating machinery hazards
- Oil leakage and fire risk
- Electrical shock from faulty wiring or components
Class survey
The class surveyor will typically check the turbocharger's performance, vibration levels, and maintenance records to ensure compliance with regulatory requirements and manufacturer's recommendations.
Components & Design
Component data being added…
Technical Data
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