混凝土搅拌车在整个施工项目中，需要做防范的工作不止有结构配件的损伤问题，对液压油路的状态也要多加注意，针对在施工项目中所出现的黑油现象，我们总结根据实际操作经验，总结出以下措施。

In the whole construction project, the concrete mixer needs to be prevented not only from the damage of structural accessories, but also pay more attention to the state of the hydraulic oil circuit. In view of the black oil phenomenon in the construction project, we summarize the following measures according to the actual operation experience.

及时更换防尘封，禁止经常出现搅拌车偏打情况。致使搅拌车液压系统发生黑油情况，不仅由粉尘引起，或许因加注黄油不规范所导致。在加注黄油时，应将搅拌车提起，钢钎压到活塞中，每次加注时只需加注标准黄油枪的半枪范围内即可。

Replace the dust seal in time, and it is forbidden to frequently hit the mixer. Black oil in the hydraulic system of the mixer truck may be caused not only by dust, but also by irregular filling of butter. When filling grease, lift the mixer truck and press the steel drill into the piston. Each time, it is only necessary to fill it within half the range of the standard grease gun.

若在加注黄油时，未压紧钢钎，所加注的黄油会在钢钎槽上限位，在钢钎工作时，黄油会直接蹿到主油封位置，随着活塞往复运动将黄油带到中缸体内，再随着中缸内的液压油混入搅拌车液压系统内，从而致使液压油发生变质、发黑等异常情况。

If the steel drill rod is not pressed during the grease filling, the grease will be at the upper limit of the steel drill groove. When the steel drill rod is working, the grease will directly jump to the main oil seal position. With the reciprocating motion of the piston, the grease will be brought into the middle cylinder, and then with the hydraulic oil in the middle cylinder mixed into the hydraulic system of the mixer truck, resulting in abnormal conditions such as deterioration and blackening of the hydraulic oil.

加装回油过滤器装置，将外界灰尘。在更换油管、钢管、回油滤芯等液压附件时，需将接口位置的粉尘，或杂物清理干净后才能松开更换。

Install oil return filter device to remove external dust. When replacing oil pipes, steel pipes, oil return filter elements and other hydraulic accessories, it is necessary to clean the dust or sundries at the interface before loosening and replacing.

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