Main Engine 2-Stroke · Main Engines (2-Stroke)
The Sulzer RTA76 8RTA76 is an eight‑cylinder low‑speed two‑stroke crosshead main engine delivering about 22,720 kW at 87 rpm, designed for direct‑drive propulsion on large ocean‑going vessels.
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| Cylinder oil feed rate check/adjustment | continuous monitoring, reviewed monthly or per running hours per maker guidance |
|---|---|
| Exhaust valve overhaul | typically every 8,000-16,000 running hours depending on fuel and operating condition - confirm against the current PMS |
| Piston overhaul (rings, crown inspection) | typically every 12,000-24,000 running hours, engine- and condition-dependent |
| Main/crosshead bearing inspection | per the maker's continuous survey scheme or typically every 2-4 years |
| Turbocharger overhaul | per maker interval, commonly every 12,000-24,000 running hours |
| Crankcase oil analysis | every 3-6 months or per maker recommendation |
| Cylinder liner bore wear | commonly assessed against a wear-per-1000-hours trend and the maker's absolute limit; use the RTA76-specific wear limit table rather than a generic figure |
|---|---|
| Main bearing clearance | compare measured clearance against the maker's new and maximum allowable clearance band for this bearing size - confirm in the instruction manual |
| Piston ring gap | typically assessed against the maker's new-condition and maximum gap figures for this bore class - confirm against the RTA76 manual rather than a generic engine value |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Falls under Continuous Machinery Survey (CMS) or the conventional special survey scheme depending on the vessel's classification; typical survey items include crankshaft deflection readings, bearing clearance records, cylinder liner wear trend, turbocharger overhaul records, and crankcase explosion relief/oil mist detection system testing.
Estimated lifetime: Major components (liners, bearings) are typically planned on a wear-trend and running-hours basis rather than a fixed life; well-maintained RTA-series engines commonly remain in service for well over 100,000 running hours between major renewals, with liners and bearings renewed on condition rather than a fixed hour limit.
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