1, the reason for instability in the speed of diesel engine in the work of high and low speed (but the oil flow), should take into account the damage to the low pressure tubing; bending the same speed governor occurs, because the speed control rod after bending, speed In the speed control process, the resistance to bending through the rotation is required, so that the speed of the machine will be unstable. 2. Using a diesel engine that has been used for a long period of time with Lerawa, due to the increase in the clearance between the connecting rod and the crankshaft, and the long-term wear of the crankshaft, the journal finish is significantly reduced, resulting in frequent occurrence of pull. In practice, as long as you change the tile, scrape a chamfer on both ends of the tile to increase its oil content, which can effectively prevent the tile. 3. What is meant by “oil beads†in the tank? When the power is found to be declining during operation of the machine and there are oil droplets or air bubbles in the tank, it should be overhauled. The first thing to consider is that the liner may have cracks. Because the crack under the action of the compressed gas can squeeze the oil in the lining wall into the tank, the oil and air bubbles in the tank will be found.