Main Engine 4-Stroke · Main Engines (4-Stroke)
Designed with a medium-speed marine auxiliary diesel engine architecture, the Daihatsu 9LDC32 operates at a nominal power output of 4770 kW and a rotational speed of 750 RPM. Featuring a 9-cylinder, L-shaped configuration with a bore of 320 mm and a stroke of 400 mm, this engine utilizes Common Rail Tier III technology for efficient fuel management. Its ability to run on Heavy Fuel Oil (HFO) or Marine Diesel Oil (MDO), with preheating capabilities for MDO, ensures flexibility in fuel selection. Among the common failures documented are issues related to valve assembly and cooling water pump maintenance, emphasizing the need for meticulous inspection and genuine parts replacement to maintain optimal performance.
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| oil_change | every 400-500 hours |
|---|---|
| fuel_filter_change | every 250-300 hours |
| air_filter_change | every 500-600 hours |
| coolant_change | every 2000-2500 hours |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| cylinder_liner | 0.5-1.0 mm wear limit |
|---|---|
| piston_rings | 0.5-1.0 mm wear limit |
| crankshaft_bearings | 0.1-0.5 mm wear limit |
| exhaust_valve_seats | 0.5-1.0 mm wear limit |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyor typically checks for compliance with Tier III emissions regulations, verifies proper maintenance and record-keeping, and inspects engine components for signs of excessive wear or damage
Estimated lifetime: 20000-25000 hours before major overhaul
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