Auxiliary Engine (Generator Set) · Auxiliary Engines
This maritime equipment belongs to the medium-sized vessel category, designed for efficient operation in various marine environments. The Daihatsu DK(M)-20(e) is a versatile model that stands out for its robust build and compact dimensions. Measuring 6350 mm in length, 2890 mm in width, and 5300 mm in height, the vessel is designed to navigate through congested waterways with ease. Its base structure, including the engine compartment and living quarters, spans 2655 mm in width, providing a stable and comfortable platform for both crew and equipment. The DK(M)-20(e) weighs in at a substantial 22 tons, ensuring it can carry heavy loads while maintaining stability and control in rough seas.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
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.
| 250-500 Running Hours | Check/adjust valve clearances, inspect fuel injector spray pattern (if accessible), check turbocharger bearing play, inspect air filter. |
|---|---|
| 1000-2000 Running Hours | Replace fuel filters (primary/secondary), replace lube oil filters, clean lube oil centrifuges/separators, inspect/overhaul fuel injectors. |
| 4000-6000 Running Hours | Overhaul fuel injection pumps, inspect/overhaul turbocharger, inspect cylinder liners/pistons via port inspection, replace main/connecting rod bearings (condition-based). |
| 8000-12000 Running Hours | Major cylinder head overhaul (valves, seats, springs, guides), inspect crankshaft deflection, replace piston rings. |
| 16000-24000 Running Hours | Major overhaul (full engine disassembly, inspection of all major components, replacement of wear parts, re-machining as required). |
| Cylinder Liner Wear | Max. 0.06 - 0.08 mm/1000h, absolute limit typically 0.6 - 0.8 mm from nominal diameter. |
|---|---|
| Piston Ring Gap (Top Ring) | Max. 1.0 - 1.5 mm (refer to manual for specific values per ring type). |
| Crankshaft Deflection | Max. 0.03 - 0.05 mm (depending on journal position and engine size, refer to manual for specific points). |
| Main/Connecting Rod Bearing Clearance | Max. 0.15 - 0.20 mm over nominal clearance (check manual for specific values). |
| Exhaust Valve Seat Recession | Max. 1.5 - 2.0 mm from original position (check manual for specific limits). |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors typically focus on regulatory compliance and the overall safety and operational integrity of the auxiliary engine. Key checks include: Functional testing of all mandatory safety devices (overspeed trip, low lube oil pressure shutdown, high cooling water temperature shutdown, emergency stops). Inspection of high-pressure fuel lines for leaks, proper shielding, and leak detection arrangements. Verification of fuel oil quick-closing valves. Inspection of the exhaust system for leaks, corrosion, and proper insulation. Assessment of engine foundation bolts for tightness and signs of movement. General condition of the engine, piping, wiring, and insulation. Review of maintenance records, running hours, oil analysis reports, and previous survey recommendations. Inspection of crankcase relief valves and pressure relief valves on fuel/lube oil systems.
Estimated lifetime: 16,000 - 24,000 hours before major overhaul; total design lifetime with proper maintenance and overhauls typically 80,000 - 120,000+ hours.
Spare parts via Daihatsu Diesel Mfg. Co., Ltd. Moriyama Division or authorised distribution partners. Lead time: 2-6 weeks.
Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.
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