In an X195 diesel engine, when the hand crank starts, the stain pressure indicator does not rise. After checking by the technicians, the pump failed to vacuum. The reason why the oil pump is empty is because the oil is too thin. Because the oil is too thin, if the parking time is long after the diesel engine is shut off, the oil in the oil pump will be completely leaked back into the oil pan. When it is started again, the oil pump is filled with air, causing the oil pump to run idle, and the oil pump cannot be transported to the lubricant. Engine oil. To temporarily solve the problem that the engine oil is too thin and the oil pump cannot be oiled, the following measures can be taken: Remove the oil filter, slowly inject some oil to the oil pump outlet, and then manually turn the flywheel to reverse the 3rd. The circle, so that the micro filter, shaking the diesel engine, the oil pressure indicator can gradually rise. The above are only temporary relief measures. The fundamental measure should be to solve the problem of over-saturation of engine oil.