方向盤是通過齒輪齒條把圓周運動轉變為直線運動，推動車輪旋轉的一個裝置。司機如果想改變車的行駛方向就需要運用方向盤來調整，方向盤對于正常行駛起著非常關鍵的作用，如果它出了問題將直接影響行車安全。
The steering wheel is a device that converts the circular motion into linear motion through the gear rack and drives the wheel to rotate. If the driver wants to change the driving direction of the car, he needs to use the steering wheel to adjust. The steering wheel plays a very key role in normal driving. If it goes wrong, it will directly affect the driving safety.
有些司機在開車時喜歡將混凝土攪拌車方向盤打得過死，其實這是很傷車的，常時間這樣操作，很容易損傷助力泵。助力泵也是混凝土攪拌車上易損的部件，經常打死方向，會讓助力泵長期處于繃緊的狀態。
Some drivers like to beat the steering wheel of the concrete mixer too hard when driving. In fact, it is very harmful to the car. If they operate like this for a long time, it is easy to damage the booster pump. The booster pump is also a vulnerable part of the concrete mixer. It often kills the direction, which will keep the booster pump in a tight state for a long time.
因此，盡量不要將方向盤打到底，即使在極端情況下，方向打死的持續時間也更好不要超過10秒。
Therefore, try not to turn the steering wheel to the end. Even in extreme cases, the duration of the steering wheel should not exceed 10 seconds.
行駛的途中建議混凝土攪拌車司機控制好行車速度，隨時觀察路面情況，避免緊急剎車以及急打方向盤，這樣即確保行車安全，也可以有效的減少對方向盤的傷害。平時要加強對混凝土攪拌車方向盤的清潔和保養，可以有效的增長它的使用壽命。
During driving, it is recommended that the driver of the concrete mixer truck 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. At ordinary times, we should strengthen the cleaning and maintenance of the steering wheel of the concrete mixer, which can effectively increase its service life.
預防維護是指維護作業的內容和時機，按預先規定的計劃執行，其目的是為了預防故障發生和維持混凝土攪拌車的工作能力。預防維護又可分為例行維護和計劃維護。例行維護的內容和時機與混凝土攪拌車行駛里程無關，如日常維護、停駛維護和換季維護等。
Preventive maintenance refers to the content and timing of maintenance work, which shall be carried out according to the predetermined plan. Its purpose is to prevent faults and maintain the working capacity of concrete mixer truck. Preventive maintenance can be divided into routine maintenance and planned maintenance. The contents and timing of routine maintenance have nothing to do with the driving mileage of concrete mixer truck, such as daily maintenance, shutdown maintenance and seasonal maintenance.
計劃維護的內容和時機與混凝土攪拌車行駛里程有關，如一級維護、二級維護等。在計劃維護中，維護作業按計劃強制執行的則稱為定期維護，如果維護作業是按定期檢查的結果按需執行的則稱為按需要維護。
The contents and timing of planned maintenance are related to the driving mileage of concrete mixer truck, such as primary maintenance, secondary maintenance, etc. In planned maintenance, if the maintenance work is enforced according to the plan, it is called regular maintenance. If the maintenance work is performed on demand according to the results of regular inspection, it is called on-demand maintenance.
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