793F and 797F Off-Highway Trucks Power Train Electronic Control System Caterpillar


Retarder Is Aggressive

Usage:

793F D3T

可能原因

  • 缓速器控制阀

  • 停车和辅助制动器控制阀

  • 松紧调整器

  • 制动管路

  • 行车制动器

建议的措施

自动控制由制动器 ECM 进行控制。 ARC 系统的功能使操作员可以在长下坡时保持卡车的恒定速度。 ARC 还能在长下坡时保持发动机的恒定转速。 ARC 还在超速条件下为发动机提供保护。 ARC 系统将发送发动机 ECM 信号以接合行车制动器。

缓速器控制阀

执行以下测试以便对缓速器空气控制阀进行故障排除。

请参阅测试和调整, KENR8738, " 行车制动器和缓速器系统压力 - 测试"。

请参阅测试和调整, KENR8738, " 行车制动器和缓速器系统泄漏 - 检查"。

请参阅测试和调整, KENR8738, "制动系统故障排除"。

停车和辅助制动器控制阀

请参阅测试和调整, KENR8738, "制动系统故障排除"。

请参阅测试和调整, KENR8738, " 停车和辅助制动器释放系统泄漏 - 检查"。

请参阅测试和调整, KENR8738, " 制动系统压力 - 测试和调整"。

松紧调整器

参考请参阅测试和调整, KENR8738, " 松紧调整器 - 测试和调整"。

参考请参阅测试和调整, KENR8738, "制动系统"。

参考请参阅测试和调整, KENR8738, " 行车制动器和缓速器系统压力 - 测试"。

制动管路

检查管路和卡箍。 通常都会发现因损坏而渗漏的管路。 没有可见渗漏的管路可能在工作期间软化。 管路的软化区域会扭折或变形,并且软管的这些区域可能会导致液体流动阻塞。 经过一段时间后,软管也可能会破裂。 软管的内侧会老化,软管松动的颗粒会导致液体流动阻塞。 确保所有软管和管路都必须正确布置。

行车制动器

对行车制动器进行故障排除时,请参考以下步骤。

参考请参阅测试和调整, KENR8738, "工作检查"。

参考请参阅测试和调整, KENR8738, "制动系统"。

参考请参阅测试和调整, KENR8738, " 行车制动器盘 - 检查(标准)"。

参考请参阅测试和调整, KENR8738, " 行车制动器盘 - 检查(长效)"。

参考请参阅测试和调整, KENR8738, " 行车制动器和缓速器系统压力 - 测试"。

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