735C and 745C Articulated Trucks Machine Systems Caterpillar


Transmission Oil Supply

Usage:

735C LFJ


执行任何测试、调整或故障诊断与排除前,请参阅系统操作、测试和调整, "故障诊断与排除前的机器准备工作"。

变速箱液压控制系统中的压力

可在变速箱液压系统周围的不同点处测试变速箱供油。

由来自变速箱泵的机油供应并控制动力传动系的大量重要部件。 系统中的压力通过变速箱液压控制安全阀调节。 该阀具备调节系统压力和向变矩器供应正确油压的双重用途。

可能进行测试,以确定变速箱泵是否供应正确的油量。

可测试以下压力,以确定机油供应是否充足。

  • 变速箱液压控制安全阀

  • 变矩器锁止离合器

  • 行星齿轮变速箱离合器

  • 变矩器进口安全压力

变速箱泵

如果在变速箱液压控制系统中的任何地方测得油压不足,则测试机油滤清器旁通阀的机油压力。 请参阅系统操作、测试和调整, "动力传动系压力"。 如果机油滤清器旁通阀的压力在规定范围内,则测试变速箱液压控制安全阀的压力。

如果变速箱液压控制安全阀的压力低于规定范围,则检查机油滤清器和机油滤清器旁通阀。 机油滤清器可能阻塞,机油滤清器旁通阀不工作。 拆下机油滤清器旁通阀,并检查机油滤清器旁通阀是否磨损或损坏。

如果机油滤清器旁通阀的机油压力低于规定范围,则变速箱油泵损坏或破裂。 变速箱油泵不可维修,则必须更换。

至变矩器的机油供应

至变矩器的机油供应由变矩器进口安全阀确定。 变矩器进口安全阀用于向变矩器供应恒压机油。 变矩器在发动机和行星齿轮变速箱之间传输扭矩。 变矩器进口安全阀与变速箱液压控制安全阀位于同一个阀体中。 变矩器进口安全阀不可调整。

测试变矩器进口的安全压力。 请参阅系统操作、测试和调整, "动力传动系压力"。 如果压力不在规定范围内,测试机油滤清器旁通阀的泵供应压力。 请参阅系统操作、测试和调整, "动力传动系压力"。 如果泵供应压力不正确,则更换变矩器进口安全阀。

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