Technical maintenance of three major assemblies of diesel fuel supply system (1)

If the diesel engine's fuel supply system does not pay attention to technical maintenance at all times, no matter which part is out of order, it will lead to poor oil supply or the engine cannot start normally, and there will be power drop, fuel consumption increase, black smoke and other symptoms. Diesel fuel supply system is divided into two parts: low pressure and high pressure. The low pressure part includes a diesel tank, a diesel primary filter, a fine filter, an oil delivery pump, and a low pressure oil pipe; the high pressure part includes an injection pump and a governor, a high pressure oil pipe, and an injector. In actual use, the following three major assemblies of the diesel fuel supply system shall be regularly maintained for technical maintenance, so as to effectively ensure the normal flow of the diesel engine oil. 1, diesel engine tank technical maintenance. (1) Shift technical maintenance. Before working every day, first open the oil drain switch in the lower part of the tank and release a small amount of precipitated oil. Before refueling, clean the dust and sludge around the filler port, open the fuel tank cap, pull out the filter, clean it with clean diesel oil, and replace it with the filler cap before you start to refuel. (2) Clean the fuel tank at the third technical maintenance. Open the oil release switch to release all remaining oil from the tank; remove the oil supply switch at the oil supply switch and wrap the tube to prevent dirt from entering the piping. Open the fuel supply switch and the fuel tank cap, add clean diesel oil from the filler port, and repeatedly flush the fuel tank until the oil flowing from the two switches is free of dirt. Clean the filter and the fuel tank cap, close the switch, fill up with diesel, put on the lid of the tank, and install the oil line. 2. Technical maintenance of the primary and secondary filters (1) When maintaining No. 1, first open the air release switch of the fine filter, and simultaneously unscrew the two oil drain plugs of the coarse and fine filters, and discharge the primary and secondary filters. Precipitate. Tighten the oil drain plug and open the tank switch so that the new oil fills the coarse and fine filters. Use a hand pump to remove air from the fuel supply system from the air release switch. (2) When maintaining the No. 3 technology, clean the primary and secondary filters. Close the tank switch and release all the oil in the coarse and fine filters. Clean the strainer: Remove the filter element, place it in clean diesel or kerosene and clean it with a brush. Clean the strainer spring and the interior of the housing with clean diesel fuel or kerosene and replace the parts. Cleaning the fine filter: Remove the fine filter element and replace it if it is seriously dirty. Clean the inner cavity of the housing and the cover, the fixing plate, the spring seat and other parts with clean diesel, and then install it. (Xixiang, Shanxi Agricultural Machinery Management Station, Xixiang County, Shaanxi Province 723500)

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