Important Tests Before Performing an Overhaul of Yanmar Diesel Generator for ShipsBlog | March 12th, 2019
Think of a ship’s generator as its powerhouse. This gear provides a vessel with energy, so if we were to call it the ship’s lifeline, that wouldn’t be an exaggeration. Keep that thought in mind, for before a major generator overhaul upon can be implemented, there are preparative tests to conduct. After all, this is a Yanmar diesel generator, which means those procedures can’t be performed in a slapdash manner.
Overhauling Yanmar Diesel Generators
As long as that lifeline uses Yanmar parts, it has to be treated as a finely engineered machine. As such, those preliminary tests assume an even more important role. There are various tools and support structures to configure. The equipment is heavy but beautifully crafted, so are there hydraulic jacks onboard to brace its uniquely profiled housing sections? Because this is a top-of-the-line construct, those jacks need to be tested before they’re asked to support the generator.
Taking Subsequent Steps
The hydraulic jacks are working. If one of those heavy duty lifters did perform poorly, it’s long since been replaced. Next, the repair team inspects and tests the starting system. There are batteries to charge and top up with distilled water. Meanwhile, has the air start motor been disengaged and checked? Like the starter handle on a vintage automobile, it’s this air-actuated cranking force that provides starting power. To check out this subsystem properly, the tech in charge will go all the way back to the compressor room to see if the air levels are satisfactorily high. Free of particulate matter and water droplets, the compressor filters and dryers provide pure, air-charged engine impetus.
Safety Tests and Electrical Checks
Before this important machinery gets the teardown treatment, collect a few baseline figures. Let’s see if the voltage and current curves are within design specs. Are there any transient spikes or unacceptable power drops taking place on the output busbar? If so, the problem is likely trapped deep down inside the marine diesel generator, perhaps in a stator winding that’s close to short-circuiting. Last of all, but no less important, there are emergency stops and alarms to examine and test-trip. Likewise, on the mechanical side, there’s the all-important relief valve to test.
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