The self loading mixer is composed of chassis and top loading. Besides the mixing tank, the hydraulic system is the most important part for the top loading Zui. The hydraulic oil pump in the hydraulic system is a relatively fine part. Therefore, great attention should be paid to the use and maintenance of the hydraulic oil pump during the operation of the self loading mixer.

油泵的工作原理：當通過操縱桿裝置使變量桿向左轉動，油泵就開始從油口排油，經過高壓油管進入馬達，馬達轉動，流經馬達的油變成低壓油，再經過另一高壓油管從另一個油口流回油泵。變量桿轉動角度越大，油泵每轉排出的油量就會越多，馬達的轉速就越高。當操縱變量桿使其向右轉動，這時壓力油就從另一口排出，馬達旋向改變，低壓油從油口流回油泵。

The working principle of the oil pump: when the variable rod is turned to the left by the control lever device, the oil pump starts to drain oil from the oil port, enters the motor through the high-pressure oil pipe, the motor rotates, and the oil flowing through the motor becomes low-pressure oil, and then flows back to the oil pump from another oil port through another high-pressure oil pipe. The greater the rotation angle of the variable rod, the more oil is discharged from the oil pump per revolution, and the higher the motor speed is. When the variable lever is turned to the right, the pressure oil is discharged from the other port, the rotation direction of the motor is changed, and the low-pressure oil flows back to the oil pump from the oil port.

自上料攪拌車馬達的轉動帶動了減速機，從而使攪拌車的攪拌罐能在一定轉速范圍內無極變速且有兩種旋向。其它液壓油泵原理也是如此。要使液壓油泵高效、無故障的工作，就要在日常使用中加強維護保養，并按說明書進行操作，按要求及時的對液壓油和輔助裝置進行更換。

The rotation of the motor of the self loading mixer drives the reducer, so that the mixing tank of the mixer can be infinitely variable in a certain speed range and has two rotation directions. The principle of other hydraulic oil pumps is the same. In order to make the hydraulic oil pump efficient and trouble free, it is necessary to strengthen the maintenance in daily use, operate according to the manual, and timely replace the hydraulic oil and auxiliary devices as required.

液壓油更換需要注意一下幾點：

Pay attention to the following points when changing hydraulic oil:

1. 使用性能穩定符合要求的液壓油，不要使用經過過濾和沉淀的液壓油。

1. Use hydraulic oil with stable performance and meet the requirements, do not use filtered and precipitated hydraulic oil.

2. 濾油器使用過濾精度為10的。

2. The oil filter should use the filter precision of 10.

3. 主系統、泵、馬達的殼體在啟動之前要充滿液壓油。

3. The shell of main system, pump and motor should be filled with hydraulic oil before starting.

4. 液壓油和濾芯要按說明書及時更換。

4. The hydraulic oil and filter element should be replaced in time according to the instructions.

自上料攪拌車的液壓系統有國產的、中外合資的、進口的，一般小型的攪拌車標配的都是國產液壓系統，大型攪拌車，比如后雙橋、小三軸、前四后八攪拌車一般標配的都是進口或中外合資的液壓系統，當然除了標配，也可選裝，可根據客戶的需求來安裝，不同品牌的液壓系統價格也是不同的。

There are domestic, Sino foreign joint venture and imported hydraulic systems for the loading mixer. Generally, the standard configuration of small mixer truck is domestic hydraulic system. For large mixer truck, such as rear double axle, small three axle, front four and rear eight mixer truck, the standard configuration is imported or Sino foreign joint venture hydraulic system. Of course, in addition to the standard configuration, it can be installed according to the needs of customers Brand hydraulic system price is also different.

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