What is a critical maintenance task to ensure the longevity of a 12N Crawler Tractor?

Monitoring and changing the engine oil as needed is critical for the longevity of a 12N Crawler Tractor because engine oil lubricates the moving parts inside the engine, reducing friction and preventing overheating. Over time, oil can become contaminated with dirt, debris, and combustion byproducts, which can lead to engine wear and potentially severe damage if not changed regularly. By keeping the engine oil at the appropriate levels and changing it according to the manufacturer's recommendations, the internal components can remain well-lubricated, leading to more efficient operation and a longer overall lifespan of the tractor. Proper oil maintenance also helps to ensure that the engine runs smoothly, which is essential for optimal performance during use.