Parking Brake Pressure Is Low
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明显低于其他组件，进行更换。 检查密封件有无损坏。 |
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