793F and 797F Off-Highway Trucks Braking System Caterpillar


Brakes Drag

Usage:

793F D3T
793F 和 797F 卡车配有手动启动的行车制动器,而减速通过电液启动。 停车和辅助制动器液压分离。 控制阀和安装件将电液控制所有制动。

可能原因

  • 松紧调整器

  • 行车制动器控制阀

  • 行车制动器

  • 制动蓄能器卸荷阀

建议的措施

松紧调整器

当松紧调节器工作正常时,在制动器分离后,行车制动器中的活塞上始终有较小的压力。

参考测试和调整, KENR8738, "793F 和 793F CMD 非公路用卡车制动系统"。

行车制动器控制阀

793F 和 797F 卡车配有单个控制阀和安装件,其位于卡车车斗的左下方。 控制阀和安装件是一个带有策略性钻孔的挡块,用于将油流从制动泵引到行车和停车制动器。

参考制动系统中的表。

参考测试和调整, KENR8738, "793F 和 793F CMD 非公路用卡车制动系统"。

行车制动器

行车制动器和减速器采用液压接合和弹簧分离形式。 当行车制动器或减速器接合时,油通过松紧调整器送往行车制动器和减速器油道。

如果此油道内保持压力,则制动器可能拖滞。

利用排气阀排出行车制动器和减速器液压系统中的空气。

参考测试和调整, KENR8738, "793F 和 793F CMD 非公路用卡车制动系统"。

参考测试和调整, KENR8738, "793F 和 793F CMD 非公路用卡车制动系统"

制动蓄能器卸荷阀

在此阀卡死时,可使压力进入制动系统内。 松紧调整器上的压力可能足以使制动器拖滞。 造成制动器冷却系统过热

参考测试和调整, KENR8738, "793F 和 793F CMD 非公路用卡车制动系统"

参考测试和调整, KENR8738, "793F 和 793F CMD 非公路用卡车制动系统"

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