Turbocharger · Turbochargers
The MAN TCA88 is an axial‑flow marine turbocharger that drives a turbine‑compressor unit to boost intake air pressure for large low‑speed diesel main engines, featuring DLC‑coated hydrodynamic slide bearings.
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.
| Compressor Cleaning (Water Wash) | Every 250-500 operating hours or as required by performance drop. |
|---|---|
| Turbine Cleaning (Granulate/Liquid Wash) | Every 500-1000 operating hours or as required by performance drop. |
| Minor Inspection (Visual, Bearing Play Check) | 4,000 - 8,000 operating hours (or annually, whichever comes first). |
| Intermediate Overhaul (Bearings, Seals, Nozzle Ring Inspection/Replacement) | 12,000 - 16,000 operating hours. |
| Major Overhaul (Full Disassembly, Rotor Balancing, Extensive Component Replacement) | 24,000 - 48,000 operating hours, depending on operating conditions and engine type. |
| Rotor Radial Bearing Clearance | New: 0.15 - 0.30 mm. Wear Limit: Typically +50% of new value, e.g., 0.45 mm (refer to OEM manual for exact model-specific values). |
|---|---|
| Rotor Axial Bearing Clearance (Thrust Bearing) | New: 0.10 - 0.25 mm. Wear Limit: Typically +50% of new value, e.g., 0.35 mm (refer to OEM manual for exact model-specific values). |
| Vibration Levels (at bearing housings) | Alarm Limit: 8-12 mm/s RMS. Trip Limit: 15-20 mm/s RMS (ISO 10816-3 for rotating machinery, specific values in OEM manual). |
| Compressor/Turbine Blade Erosion/Fouling | Visual inspection for significant material loss, cracks, or heavy, uneven deposits that cannot be removed by washing. Any visible crack is critical. OEM manual provides visual acceptance criteria. |
| Nozzle Ring Gap Increase | Typically limited to a percentage increase from new (e.g., 10-15%) before requiring replacement due to efficiency loss. Exact values in OEM manual. |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
During the annual Class Survey, the surveyor typically checks for: Operational performance (boost pressure, speed, exhaust gas temperatures, oil parameters) against design and previous records. Verification of overspeed trip functionality (review test records or witness test). General condition, including absence of leaks (oil, water, exhaust gas), excessive vibration, and abnormal noises. Review of maintenance records to ensure adherence to manufacturer's service intervals. Inspection of foundation, mountings, and safety guards. Visual check of air intake and exhaust ducts for integrity and cleanliness.
Estimated lifetime: Major overhaul interval: 24,000 - 48,000 operating hours. Design life of main casings and rotor shaft (with proper maintenance and component replacement): 100,000+ operating hours.
Spare parts via MAN Energy Solutions SE or authorised distribution partners. Lead time: 2-6 weeks.
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