C4.4 Industrial Engine Caterpillar


Engine Oil Pressure - Test

Usage:

C4.4 444

机油压力低

下述情况会导致机油压力低。

  • 曲轴箱中的油位低。

  • 吸油滤网上发生阻塞。

  • 机油管接头泄漏。

  • 连杆或主轴承磨损。

  • 机油泵中的转子磨损。

  • 机油压力安全阀工作异常。

机油安全阀磨损可能会使机油通过安全阀时发生泄漏,从而降低机油压力。 有关正确的工作压力及其它信息,请参阅规格模块, "发动机机油安全阀"。

当发动机在正常温度下高怠速运转时,机油压力必须至少达到 280 kPa (40 psi)。 低怠速时机油压力低是正常的。

可以使用适当的压力表测试润滑系统的压力。

机油压力高

机油压力高可能由以下情况引起。

  • 机油安全阀弹簧安装不正确。

  • 机油安全阀柱塞卡在关闭位置。

  • 机油中有大量油泥,使机油粘度过高。

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