Main Engine 4-Stroke · Main Engines (4-Stroke)
The Caterpillar 3512E is a marine diesel engine of the 3500 series, used for propulsion and also as a generator drive on commercial vessels. It is a V-configuration, four-stroke, turbocharged and aftercooled engine installed in the engine room and coupled to a reduction gear and propeller, or to a generator in a diesel-electric or auxiliary arrangement. It is typically specified for workboats and vessels needing compact, high-output power.
| Oil and filter change | typically every 250-500 hours depending on oil analysis trend and duty - confirm against the maker's schedule |
|---|---|
| Coolant sample/analysis | every 250-500 hours |
| Fuel filter change | every 250-500 hours, or per differential pressure indication |
| Turbocharger inspection | per the maker's scheduled overhaul interval, typically several thousand hours |
| Valve lash/injector adjustment check | per the maker's scheduled maintenance interval |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
As a classed propulsion engine, expect Continuous Survey Machinery treatment if enrolled, with ECM fault-log review, turbocharger and injector overhaul records, and governor/overspeed trip testing required at survey.
Estimated lifetime: Medium-speed diesels of this size class are typically given in the range of 30,000-40,000 hours to major overhaul under marine propulsion duty, per general guidance for the series - confirm against the specific rating and duty cycle applied to this unit.
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