Main Engine 4-Stroke · Main Engines (4-Stroke)
The HiMSEN 6L H17/28 is a compact, medium‑speed 6‑cylinder 4‑stroke diesel engine delivering up to 1 200 kW at 900 rpm, supplied as a complete genset for auxiliary power or small main propulsion applications.
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| Lube oil sample analysis | every 250-500 running hours |
|---|---|
| Fuel injector overhaul/exchange | typically 8,000-12,000 hours for this engine family - confirm against the maker's maintenance schedule for the H17/28 |
| Cylinder head/valve overhaul | typically 12,000-16,000 hours |
| Turbocharger overhaul | typically 12,000-24,000 hours depending on turbocharger type |
| Major overhaul (piston/liner) | typically in the 24,000-32,000 hour range for this engine class |
| Overspeed trip test | per maker's schedule, commonly annually |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Cylinder liner wear | renew or re-bore once wear trend or bore diameter exceeds the maker's maximum for the 170 mm bore - confirm the exact figure against the engine manual |
|---|---|
| Piston ring gap | typically 0.8-1.5 mm as-new closing gap for this bore class - renew at the maker's stated maximum gap, confirm against the manual |
| Main bearing clearance | renew once clearance exceeds the maker's maximum, commonly on the order of a few tenths of a mm for this engine size - confirm the exact figure against the manual |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Under Continuous Machinery Survey where enrolled: class reviews the running-hours log, crankcase explosion relief valve condition, oil mist detector calibration, and major-component overhaul records against the maker's recommended intervals; deviating from the maker's schedule requires justification via condition monitoring such as oil analysis and performance data.
Estimated lifetime: Medium-speed 4-stroke engines of this class are typically designed around an overhaul-based service life extending well beyond 100,000 running hours with scheduled renewal of liners, bearings and valves - actual life depends heavily on load profile, fuel quality and maintenance adherence.
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