Main Engine 4-Stroke · Main Engines (4-Stroke)
The Rolls‑Royce Bergen B32:40 is a V‑type, 16‑cylinder, low‑speed diesel main engine delivering up to 7 200 kW at around 720 rpm, designed for large commercial vessels requiring high torque and fuel flexibility.
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| Lube oil analysis | every 500 running hours |
|---|---|
| Valve clearance adjustment | typically every 4000-6000 hours - confirm against the maker's manual for this engine |
| Injector service | typically every 8000-12000 hours - confirm against maker's schedule |
| Turbocharger overhaul | typically every 12000-16000 hours - confirm against the manual |
| Vibration damper inspection | per maker's interval, typically at major overhaul |
| Piston/liner top overhaul | commonly in the 16000-24000 hour range for this engine class - confirm against maker's maintenance schedule |
| Cylinder liner wear | guideline wear rate around 0.3-0.4 mm per 1000 hours, condemning limit commonly 0.8-1.2 mm diametral for this bore class - confirm against maker's manual |
|---|---|
| Main/big-end bearing clearance | typically 0.15-0.35 mm for this journal size class - confirm against the manufacturer's tables |
| Piston ring gap (installed) | typically 0.03-0.045 x bore diameter as new for this bore class - confirm against manual |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Main engines of this type normally fall under Continuous Machinery Survey or periodic special survey: crankshaft deflection readings, governor/overspeed and safety trip tests, oil mist detector function test, with running hours and major overhaul records maintained for the surveyor.
Estimated lifetime: Medium-speed trunk-piston engines of this class are typically overhauled at major component intervals in the 20,000-30,000 hour range, with overall engine service life well in excess of 100,000 hours under proper maintenance - an industry general guide rather than an engine-specific figure.
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