When unqualified diesel oil is filled or impurities are mixed in the process of filling, it is easy to block the oil suction pipe, filter screen, diesel oil filter, oil tank cover vent and other parts in the oil tank. There are many precision components in the hydraulic system, and the invasion of solid impurities will lead to engine strain, oil duct blockage and other faults. The water and oil sludge at the bottom of the oil tank must be thoroughly removed according to the field operation environment, Strengthen the regular cleaning and maintenance of oil circuit and diesel filter, clean or replace the filter element in time to ensure the oil circuit sealing and diesel cleaning.
The fuel in the fuel tank is pumped to the high-pressure oil pump through the low-pressure oil circuit under the suction action of the oil delivery pump or the fuel injection pump. If the low-pressure oil circuit is not sealed tightly or the oil level in the fuel tank is too low, and the vehicle is inclined to park and drive, the air is easy to mix into the oil circuit to form the air resistance of the low-pressure oil circuit. In the high temperature season, the fuel is easy to evaporate, which will also form the air resistance in the low-pressure oil circuit, leading to the unstable operation of the engine, Automatic flameout or failure to start. It is difficult to start the engine when the plunger and outlet valve parts of the injection pump are severely worn. It is necessary to replace the plunger and outlet valve parts.
