After the diesel engine is stopped

After the diesel engine is stopped for a long time or the fuel system is disassembled and installed, there is no oil when the engine starts because of leakage and invasion of air in the oil route. At this time, attention should be paid to exhaust by using the manual oil pump on the oil pump. The method is as follows: first unscrew the exhaust screw on the diesel fine filter; Then unscrew the button of the manual oil pump; Press the button of the manual oil pump by hand and pump the oil by hand to make the air in the oil passage come out from the vent screw on the fine filter. The oil is manually pumped several times until the diesel oil bubbles out at the exhaust screw. Finally tighten the button of the manual oil pump for the exhaust screw.