Fuel transfer pump of WEICHAI engine loader

When there is air in the oil passage of the diesel engine, some new cars just off the assembly line, or the oil in the fuel tank is burned out, when the engine is started, the engine cannot be started, because the diesel fuel pump can only work when the engine is started. The hand fuel pump pumps the fuel in the fuel tank into the fuel passage (first loosen the vent bolt on the fuel injection pump until the bubbles are exhausted).

Principle: The hand oil pump has two check valves. When the handle is pressed down, the pressure in the inner cavity of the oil delivery pump increases, the oil outlet check valve opens, the oil inlet check valve closes, and the diesel is pressed into the fuel injection pump; loosen The opposite is true when the handle is used. The pressure in the lumen of the fuel transfer pump is balanced (less than the pressure in the fuel tank, and diesel is sucked in from the fuel tank.