With the development of engineering vehicles, the transmission technology is also constantly improving. Now, the gearbox of common automatic mixer is generally 8-12, and the speed ratio is generally between 14-1. With the continuous development of modern transmission technology, materials are developing in the direction of high strength, high wear resistance and lightweight, and the gears are constantly changing, which plays an important role in reducing the fuel consumption of the mixer and reducing the loss of transmission kinetic energy. The gearbox is an important part of the automatic loading concrete mixer, but the gearbox needs maintenance. If we neglect the maintenance at ordinary times, it may cause the mixer truck to shift improperly, weaken the power, and make it difficult to rotate the tank. Because there are a lot of gears and synchronizers in the gearbox, they can work normally under the condition of good lubrication. If the gearbox oil is not changed for a long time, it is likely to cause the gearbox lubrication difficulty, heat dissipation difficulty and gear wear of cement mixer truck. So how should we maintain the gearbox of the automatic loading concrete mixer?

　　一、自动搅拌车变速箱的保养方法

　　1、 Maintenance method of automatic mixer gearbox

　　1、正确把握变速箱的油的使用周期，定期更换。一般多数厂家会建议变速箱换油周期通常为两年或4~6万。车主朋友们在使用车辆时要保持变速箱油清洁，因为变速箱油运用时间长了以后会发生油垢，有可能会构成油泥，会加大各摩擦片和各部件的磨损，还会使各阀体中阀体的移动不畅，油压操控受影响，从而使全自动搅拌车变速箱出现异常。

　　1. Correctly grasp the service life of transmission oil and replace it regularly. Generally, most manufacturers will recommend that the oil change interval of gearbox is usually two years or 40000 ~ 60000 km. Car owners should keep the transmission oil clean when using the vehicle, because the transmission oil will become oil dirt after using for a long time, which may form oil sludge, increase the wear of friction plates and components, and block the movement of valve body in each valve body, and affect the oil pressure control, so that the gearbox of automatic mixer truck appears abnormal.
            

　　2、经常查看变速箱油液位是不是正常。查看变速箱油液需要将油预热到50℃左右，再将挡位杆在各挡位逗留2秒钟后置于泊车挡，此刻油尺正常油面应坐落高限度与低限度线之间，如未达到，应及时增加一样质量的油品。

　　2. Always check whether the transmission oil level is normal. To check the transmission oil, it is necessary to preheat the oil to about 50 ℃, and then put the gear lever in the parking gear after staying in each gear for 2 seconds. At this moment, the normal oil level of the oil dipstick should be located between the high limit line and the low limit line. If not, the same quality oil should be added in time.

　　3、正确更换变速箱油。动态换油是目前比较提倡的换油方法，选用专用的变速箱清洁设备，在变速箱工作的过程中，将旧油充沛循环，排放洁净后再参加新的变速箱油，从而使换油率高达90以上，确保换油。

　　3. Change the transmission oil correctly. Dynamic oil change is a relatively advocated oil change method at present. The special gearbox cleaning equipment is selected to fully recycle the old oil during the working process of the gearbox. After the oil is discharged and cleaned, the new transmission oil is added, so that the oil change rate can be as high as 90 and the oil change efficiency can be ensured.

　　4、还有就是不要随便拆卸变速箱，变速箱在装配的时候，是厂家经过准确调配的，包括每一个螺丝的位置和松紧度都是有技术参数的，如果我们手工拆卸以后，很难装回原来的位置，这势必会加重变速箱额磨损。需要维修变速箱一定要到底盘厂家的维修服务站中，由的维修人员进行操作。

　　4. What's more, don't dismantle the gearbox casually. When the gearbox is assembled, it is accurately allocated by the manufacturer, including the position and tightness of each screw. If we disassemble it manually, it is difficult to install it back to the original position, which is bound to aggravate the wear of the gearbox. If you need to repair the gearbox, you must go to the maintenance service station of the chassis manufacturer, and be operated by professional maintenance personnel.

　　司机朋友们可根据以上的四点对自动上料混凝土搅拌车的变速箱进行日常保养，延长其使用寿命。

　　Driver friends can according to the above four points on the automatic feeding concrete mixer gearbox routine maintenance, to extend its service life.

　　二、自动搅拌车在日常的使用中一定要注意的两点

　　2、 Two points must be paid attention to in daily use of automatic mixer

　　1、下坡不要放空挡滑行，这种开车习惯要不得，不仅会损坏变速箱，还有非常大的隐患。

　　1. Don't slide in neutral when you go downhill. This driving habit is very bad. It will not only damage the gearbox, but also cause great security risks.

　　2、在高档区高速行驶的时候，不要把变速箱变入低速档，这回导致变速箱内部齿轮的磨损甚损坏。因为一旦变速箱中磨损的粉末或残渣多了，会随着变速箱油扩散，快速磨损整个变速箱的所有齿轮。

　　2. When driving at high speed in the high-grade area, do not change the gearbox into low-speed gear, which will cause wear and even damage to the internal gears of the gearbox. Because once the wear powder or residue in the gearbox is too much, it will quickly wear all the gears of the whole transmission as the transmission oil diffuses.