Turbocharger · Turbochargers
The ST5 compressor is commonly found in the engine rooms of marine vessels, where it plays a crucial role in managing exhaust gas and charge air for 4-stroke diesel engines. Designed for both marine and stationary applications, this compressor is integral to the efficient operation of large diesel engines. The compressor's medium is specifically designed to handle exhaust gas and charge air, ensuring optimal performance and reliability. Common issues encountered during operation include compressor fouling, bearing wear, turbine-side fouling, and rotor imbalance. Regular maintenance and adherence to the manufacturer’s manual and classification society requirements are essential to prevent these issues. Annual inspections at class surveys are mandatory to ensure the equipment remains in optimal condition. Additionally, it is important to stock spare parts as specified by the manufacturer, as exact match parts are required to maintain the compressor's functionality.
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What our service work and the manufacturer documentation say about keeping this model running.
Servicing per the manufacturer's manual and classification society requirements. Annual inspection at class survey. Stock spare parts as specified by the manufacturer.
| Minor Inspection (visual, air filter) | 500 - 1000 running hours |
|---|---|
| Intermediate Inspection (compressor cleaning, bearing check) | 4000 - 8000 running hours |
| Major Overhaul (full disassembly, bearing replacement, balancing) | 12000 - 16000 running hours |
| Class Survey Inspection | Annually (external), every 2.5 years (internal, depending on class rules) |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Axial Bearing Clearance (new) | 0.10 - 0.15 mm |
|---|---|
| Axial Bearing Clearance (maximum allowable) | 0.25 - 0.30 mm |
| Radial Bearing Clearance (new) | 0.05 - 0.10 mm |
| Radial Bearing Clearance (maximum allowable) | 0.15 - 0.20 mm |
| Rotor Run-out (visual check for rubbing marks, vibration monitoring) | Max 0.05 mm (at shaft ends, if measurable) |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors typically verify maintenance records (running hours, overhaul history), inspect externally for leaks, damage, and secure mounting. They will often require bearing clearance checks (axial/radial play) during internal inspections (e.g., every 2.5 years), confirm rotor free rotation, and check the condition of safety devices (e.g., overspeed trip, alarms). Documentation of spare parts onboard and confirmation of regular cleaning procedures are also common points.
Estimated lifetime: 12,000 - 16,000 hours before major overhaul; total operational life can exceed 80,000 hours with proper maintenance and component replacement.
ST5 parts are common in service inventories, but must be matched by exact execution.
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