The steering wheel is a device that converts circular motion into linear motion through gear and rack, and drives the wheel to rotate. If the driver wants to change the driving direction of the cement mixer truck, he needs to use the steering wheel to adjust it. The steering wheel plays a key role in normal driving. If it goes wrong, it will directly affect the driving safety.

有些司机在开车时喜欢将水泥搅拌车方向盘打得过死，其实这是很伤车的，常时间这样操作，很容易损伤助力泵。助力泵也是水泥搅拌车上易损的部件，经常打死方向，会让助力泵长期处于绷紧的状态。

Some drivers like to turn the steering wheel of the cement mixer truck too hard when driving. In fact, it is very harmful to the car. It is easy to damage the booster pump when operating in this way for a long time. The booster pump is also a vulnerable part of the cement mixer. It often kills the direction, which will make the booster pump in a tense state for a long time.

因此，尽量不要将方向盘打到底，即使在极端情况下，方向打死的持续时间也更好不要超过10秒。

Therefore, try not to turn the steering wheel to the end. Even in extreme cases, the duration of steering death is better than 10 seconds.\

行驶的途中建议水泥搅拌车司机控制好行车速度，随时观察路面情况，避免紧急刹车以及急打方向盘，这样即确保行车，也可以有效的减少对方向盘的伤害。平时要加强对水泥搅拌车方向盘的清洁和保养，可以有效的增长它的使用寿命。

During driving, it is recommended that the cement mixer driver control the driving speed, observe the road conditions at any time, and avoid emergency braking and sudden turning of the steering wheel, so as to ensure driving safety and effectively reduce the damage to the steering wheel. The cleaning and maintenance of the steering wheel of the cement mixer truck should be strengthened at ordinary times, which can effectively increase its service life.

预防维护是指维护作业的内容和时机，按预先规定的计划执行，其目的是为了预防故障发生和维持水泥搅拌车的工作能力。预防维护又可分为例行维护和计划维护。例行维护的内容和时机与水泥搅拌车行驶里程无关，如日常维护、停驶维护和换季维护等。

Preventive maintenance refers to the content and timing of maintenance work, which is carried out according to the predetermined plan. Its purpose is to prevent failure and maintain the working capacity of the cement mixer. Preventive maintenance can be divided into routine maintenance and planned maintenance. The content and timing of routine maintenance have nothing to do with the mileage of the cement mixer, such as routine maintenance, shutdown maintenance and seasonal maintenance.

计划维护的内容和时机与水泥搅拌车行驶里程有关，如一级维护、二级维护等。在计划维护中，维护作业按计划强制执行的则称为定期维护，如果维护作业是按定期检查的结果按需执行的则称为按需要维护。

The content and timing of the planned maintenance are related to the mileage of the cement mixer, such as the first level maintenance and the second level maintenance. In planned maintenance, if the maintenance work is carried out according to the plan, it is called regular maintenance. If the maintenance work is carried out according to the results of regular inspection, it is called on-demand maintenance.

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