For a while, I was completely satisfied with the Caterpillar 938 excavator-loader. The machine is equipped with a C6E engine and a common rail fuel system. One day, the excavator stopped starting. The engine itself worked fine only up to 1500 RPM, and then it would start stalling. Additionally, thick white smoke started coming out of the exhaust. The breakdown was fixed at a service center by an acquaintance. Since then, six months have passed without any further issues occurring.