• Accumulated dirt or deposits on turbine blades or compressor impellers can cause an imbalance in the rotating assembly.
• Turbine blades or lashing wires may be damaged due to wear, fatigue, or foreign object impact.
• A loose or improperly secured blower impeller can create uneven rotation and vibrations.
• A bent or distorted shaft may result from overloading, misalignment, or bearing failure.
• Bearing wear or misalignment can lead to irregular shaft rotation and vibrations.
• Entry of foreign objects (e.g., debris, soot) into the turbine or blower side can disrupt balance.
• Loose or damaged foundation bolts may allow movement of the turbocharger during operation.

1. Perform regular dry or water washing of the compressor and turbine blades as per the manufacturer's recommendations.
2. Regularly inspect turbine blades and lashing wires for wear or damage and renew them if required.
3. Ensure foundation bolts are properly tightened and undamaged.
4. Replace bearings at intervals specified in the Planned Maintenance System (PMS), regardless of their apparent condition.
5. Maintain proper lubrication and renew the lubricating oil as per the schedule.
6. Ensure injectors and fuel pumps are maintained to provide efficient combustion and minimize deposits.
7. Follow the PMS for scheduled inspections, cleaning, and overhauling of the turbocharger system.

1. For taking the Turbocharger out of operation, the rotor must be locked to prevent rotation.

• For constant pressure turbochargers, locking the blower side is sufficient as exhaust gas pressure has minimal impact on turbine blades.
• For pulse-type turbochargers, both the turbine and blower sides must be locked.

2. If required, bypass the exhaust gas inlet by installing a specially designed bypass pipe as provided by the manufacturer.

3. If exhaust gases are allowed to flow through the locked turbine, ensure air circulates through the blower to prevent overheating of the impeller:

• If the auxiliary blower takes suction through the turbocharger, this condition is automatically satisfied.
• If not, create a small hole (as per the manufacturer’s recommendation) in the blanking plate on the air outlet to allow airflow.

4. Cooling water flow should only be stopped if significant leakage endangers engine operation.

5. Ensure the turbocharger bearing chambers are drained of lubrication if the turbocharger is out of operation.

1. The engine can only operate at reduced load as per the manufacturer’s instructions due to insufficient air supply.
2. A shortage of air leads to incomplete combustion, resulting in:
   • High Exhaust Gas Temperatures
   • Black Smoke
   • Carbon Deposits
3. Sudden speed changes during manoeuvring can result in uneven thermal expansion, leading to thermal shock in engine components.
4. Reduced air availability increases fuel consumption per unit of power (Increased SFOC).
5. Heavy carbon deposits on pistons may increase the wear rate of liners and piston rings.
6. Poor combustion produces higher levels of air pollutants such as soot and unburnt hydrocarbons.