For a lot of Highly Intensified Diesel engine, the piston is always under high temperature and high pressure, prone to scuffing, burning or failure fault. To solve such I star problem, high strength diesel engine is mostly equipped with piston oil cooling nozzle C figure 3-54). By cooling oil at the bottom of piston upper plane, the lubrication of piston pin and connecting rod bearing is reduced. Special attention should be paid to the maintenance of diesel engines with piston oil cooling nozzles.

(1) in the installation hole of the oil nozzle, the extension valve is generally installed to control the injection of oil. The installation direction of this one-way valve should be paid attention to in maintenance, and the reverse installation should be avoided.

The position of the nozzle of the oil cooling nozzle is very sensitive to the cooling effect of the piston. Therefore, the position should be paid attention to in installation, so as to avoid the abnormal damage of the piston.

If the diesel engine is in use, a cylinder or cylinder is always burning fault, in the absence of other factors, should focus on checking whether there are some problems in piston engine oil cooling nozzle.