E239/E240 Rear Parking Brake Dragging
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问题:停车制动器驱动压力超出技术规格     | |||
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可能的部件根源     | 非部件根源     | 如何诊断     | 修正措施     |
停车和辅助制动器继电器阀     | 污染     | 释放停车制动器并测量停车制动器缩回压力。 如果压力超出技术规格(4600 +/- 800 kPa),执行纠正措施。     | 用新停车/辅助制动器继电器阀进行维修。 确保机油为 ISO 18/15 或更高等级。     |
停车制动器电磁阀     | 污染     | 用新停车制动电磁阀进行维修。 确保机油为 ISO 18/15 或更高等级。 | |
AETA/TCS 阀     | 污染     | 检查确认 AETA 自测试是否正常工作。 确保左后和右后停车制动器的压力平稳地升高和降低。 如果有一侧不能循环,则检查和维修 AETA 阀。     | 用新 AETA 阀进行维修。 确保机油为 ISO 18/15 或更高等级。     |
安全阀卡滞在开启位置     | 污染     | 制动器泵在蓄能器压力下失速。     | 更换或复位安全阀。     |
制动器组件     | 过量增压     | 接合停车制动器并测量制动器组件处的压力。 四个压力应全部在公差范围内。     | 如果一个或多个制动器组件低于其他组件,进行更换。 检查密封件有无损坏。     |
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