The PT fuel pump is one of the main components of the bulldozer engine. It is necessary to check it frequently, maintain more frequently, find problems in time and make corresponding troubleshooting in time. The following is the diagnosis and troubleshooting method of PT fuel pump injector dripping phenomenon

　　The PT fuel pump injector has oil leakage because the pressure chamber of the injector is connected to the fuel oil circuit, and the injector and the cylinder are interconnected, and the injector has six or seven injection holes. It is precisely because of the appearance of these structures that the fuel injector will leak oil and drip oil. The high-mounted fuel tank is a component of the PT system. Compared with other parts in the PT system, the high-mounted fuel tank has special performance. The high-mounted fuel tank is a part higher than the PT pump and the PT injector. If the PT fuel system is not completely shut down during operation, it will cause diesel leakage in the high-mounted fuel tank. These leaked fuel will eventually reach the cylinder along with the circuit in the bulldozer system, causing the PT pump to drip oil. After clarifying the cause, when operating the bulldozer, check the bulldozer in advance. At the end of each day, check the bulldozer to see if the mechanical switch is completely closed to reduce the occurrence of oil dripping from the PT fuel pump.