Taking DF4B locomotive as an example, this paper analyses the reason of too low lubricating oil pressure in running diesel engine, and gives countermeasures for it.

以DF 4 B型机车为例，系统地分析了造成柴油机机油压力低的原因，并提出其判断方法和对策。

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Lubricating oil of the low pressure system supplies the main and other bearings.

低压系统的滑油供给主轴承和其它轴承。

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These essential extreme pressure properties prevent the rupture of the lubricating oil film within the impact mechanism, where both reciprocating and rotating motions are employed.

这些基本的极压特性，可防止油膜于往复式及旋转式的撞击情形下破裂。

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