C3.4B Engines for Caterpillar Built Machines Caterpillar


Engine Oil Pressure - Test

Usage:

CD-44B 398

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。

  • 机油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。

机油压力安全阀磨损可能会使机油通过阀发生泄漏,从而降低机油压力。

在 2200 rpm 的最大发动机转速和正常工作温度下,最小机油压力为 400 至 480 kPa (58.016 至 69.619 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。

  • 机油压力安全阀的弹簧安装不正确。

  • 机油压力安全阀的柱塞卡在关闭位置。

  • 机油中有大量油泥,使机油粘度过高。

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