Experts all suggest that the air conditioner should be turned off one or two minutes before the flameout. In this way, in addition to drying the air outlet of the air conditioner and preventing bacteria from growing in the air conditioner, more importantly, if the air conditioner is not turned off, the engine will start with the load of the air conditioner when the concrete mixer starts next time. The correct way is to start the concrete mixer for two or three minutes and turn on the air conditioner after the engine is lubricated.

所以，如果堵車、等人，發動機長時間處于怠速狀態下，更好將空調關閉一會兒，既能減輕發動機負擔，還能有效地省油。

Therefore, if the engine is idling for a long time in traffic jams, it is better to turn off the air conditioner for a while, which can not only reduce the burden of the engine, but also effectively save fuel.

空擋滑行 損壞輕量化攪拌車變速箱

Damage to gearbox of lightweight mixer in neutral sliding

手動擋的司機，喜歡空擋滑行，雖然有隱患，但因為省油，很多人習慣這么做。

Manual drivers like to slide in neutral gear. Although there are potential safety hazards, many people are used to doing so because of fuel economy.

而對于自動擋車來說，空擋滑行更是有百害而無一利：現在的家用轎車基本都是電噴發動機，混凝土攪拌車發動機轉速在1000轉以上松掉油門后，混凝土攪拌車發動機也會自動停止給油 ——如果司機的混凝土攪拌車有即時油耗表，就可以清楚地看到這時的油耗為零。而自動擋空擋滑行時因開車速度與發動機轉速不同，易出現變速箱的液壓管路中油壓不足，就會加大摩擦，損害自動變速箱內部的摩擦片，更終導致變速箱出故障。

For the automatic stop car, sliding in neutral gear is more harmful than beneficial: the current family cars are basically EFI Engines, and the engine speed of the concrete mixer truck is above 1000 rpm. When the accelerator is released, the engine of the concrete mixer truck will automatically stop feeding oil ——If the driver's concrete mixer has a real-time fuel consumption meter, you can clearly see that the fuel consumption is zero at this time. When the automatic transmission taxis in neutral gear, due to the different driving speed and engine speed, the oil pressure in the hydraulic pipeline of the transmission is easy to be insufficient, which will increase the friction, damage the internal friction plate of the automatic transmission, and eventually lead to the failure of the transmission.

所以，開慣手動擋的車主，如果拿以前的經驗開自動擋車，小心得不償失。

Therefore, if the car owners who are used to driving in manual gear take the previous experience to drive in automatic gear, they will be careful that the gain is not worth the loss.

車位不平整 傷害攪拌車車架

Damage to mixer frame due to uneven parking space

馬路邊，經常看到有些混凝土攪拌車一半車輪停在馬路牙子上。長期這樣停車，會導致四輪落差過大，對車架造成扭曲，甚影響到車門的閉合。長期在凹凸不平的地面上停車，也會造成類似后果。

On the side of the road, we often see half of the wheels of some concrete mixers parked on the curb. Parking in this way for a long time will lead to excessive drop of four wheels, distortion of the frame, and even influence the closing of the door. Parking on uneven ground for a long time will cause similar consequences.

所以，停車后車輪不回正，也是很傷車的：會傷害方向機拉桿及防塵套，影響轉向系統。

Therefore, if the wheels do not return to the right position after parking, it is also very harmful to the car: it will damage the steering linkage and dust cover, and affect the steering system.

剎車不踩到底就掛擋 損傷攪拌車變速器

The transmission of mixer is damaged when the brake is not pressed to the bottom

手動擋的車，混凝土攪拌車的離合器不踩到底強行掛擋會損傷變速器。自動擋車會不會有類似問題呢?

If the clutch of manual transmission and concrete mixer is not pressed to the bottom, the transmission will be damaged. Will there be a similar problem with automatic blocking?

說，自動擋的車半踩剎車、剎車燈亮起，就能將擋位推入P擋。如果混凝土攪拌車剎車沒踩死就直接推到P擋熄火，路面不平整時混凝土攪拌車會小小挪動一下，會對變速齒輪造成沖擊。

Experts say that a car with automatic transmission can push the gear into P when the brake is half pressed and the brake light is on. If the brake of the concrete mixer is not stepped down, it will be directly pushed to the P gear to stop the fire. When the road is uneven, the concrete mixer will move a little, which will impact the speed change gear.

所以，長此以往，肯定對車輛沒好處。

Therefore, in the long run, it is certainly not good for vehicles.

打死方向 破壞混凝土攪拌車方向機

Destroy the direction of concrete mixer

開車打死方向的毛病，記者也有：剛學車時，移庫手忙腳亂，都是打死方向才敢慢慢松離合器讓混凝土攪拌車動起來。提醒，經常打死方向盤會對混凝土攪拌車的方向助力泵有損耗，時間長了會加劇助力泵皮帶老化，助力泵壞掉，對混凝土攪拌車方向機也有影響。

Driving to kill the direction of the problem, the reporter also has: just learn the car, moving the warehouse in a hurry, are killing the direction to dare to slowly loose the clutch, let the concrete mixer move. Experts remind that killing the steering wheel often will cause damage to the steering power pump of the concrete mixer, which will aggravate the aging of the booster pump belt after a long time, and the damage of the booster pump will also have an impact on the steering gear of the concrete mixer.