Once the generator fuel system into the air, it is difficult to start or run Yuchai generator instability, embarrassed. Below the most common piston pump fuel supply system, for example, will have the phenomenon of air in the oil system to be analyzed, and identify various exclusion methods.
The fuel supply system generator with low oil pressure and oil branch. Low pressure oil circuit refers to the oil pump from the fuel tank to the low pressure oil cavity of the injection pump. On the supply system of plunger pump, high pressure oil will not have air infiltration, there is a leak, will only lead to fuel leakage, try to block the leak. Talk about the following key problems in the low pressure oil leak.
Generator fuel supply system mostly adopts low-voltage circuit soft hose, hose easily with parts of friction, caused by oil spills and intake. Oil leakage is relatively easy to find, and the pipeline is not easy to find a damaged inlet. The following is the judgment method of low pressure oil leakage of the.
1, oil in the air exhaust, after the engine, diesel engine is to find the missing place, where the leak.
2, Yuchai engine fuel injection pump bleed screw loose, hand pump oil pump, if found at the vent screw began to expel large bubbles of oil flow, and the repeated hand pump, the bubble is still not disappeared, can be determined in the fuel tank to the fuel pump oil leak in a period of negative pressure. The pipe should be removed, and then pass into the gas pressure, placed in water, find out the bubbles, which is where the leak.
In addition, the 3 pipeline problems, in a variety of gasket pipe joints will be due to improper installation, deformation, aging damage cause leakage, a leak, before a detailed investigation on the pipeline, should first check on these nodes.
In 4, generator outside of the oil tank a hard pipe generally less failure, after the examination still can not find the leak, but finally check it.