Running in is also called running in. The running in period of concrete mixer truck refers to the initial driving stage after a new car or overhaul, which is generally 1000 ~ 1500 km, which is the basic mileage to ensure full contact, friction, adaptation and finalization of the machine parts. During this period, the ability of each part of the concrete mixer truck to adapt to the environment can be adjusted and improved, and the bumps on the parts can be grinded off. The running in quality of concrete mixer truck will have an important impact on its life, safety and economy.

出廠后的新攪拌車，雖然已經進行過磨合，但是零件的表面依然較粗糙。另外在加工、裝配時存在一定的偏差和一些很難發現的隱患。另外，新零件與配件間，有很多金屬粒脫落，這些金屬粒不僅使零件間的磨損加劇，而且落入機油后還會使機油的質量下降，影響了潤滑的效果。由于新的零件在運行時摩擦阻力比正常時期大，所以油耗也會比較高。

Although the new mixer truck has been run in, the surface of the parts is still rough. In addition, there are some deviations and hidden dangers in the process of processing and assembly. In addition, a lot of metal particles fall off between new parts and accessories. These metal particles not only aggravate the wear between parts, but also reduce the quality of engine oil after falling into the engine oil, which affects the lubrication effect. Because the friction resistance of the new parts is larger than that in normal period, the fuel consumption will also be higher.

1、磨合過程：自上料混凝土攪拌罐車的磨合里程為1000－2500公里，進口車的磨合期則更長一些，多數為1500－3000公里。磨合期分為三個階段。行駛里程至100公里時為磨合初期，200公里時為初磨合程度，3000公里就可磨合形成氧化膜。

1. Running in process: the running in mileage of concrete mixer truck is 1000-2500 km, while that of imported truck is longer, mostly 1500-3000 km. The running in period is divided into three stages. When the mileage reaches 100 km, it is the initial running in period, 200 km is the initial running in degree, and the running in can form oxide film at 3000 km.

2、行駛速度：磨合期內應盡量低速行駛。一般情況下，載重自上料混凝土攪拌罐車車速不宜超過45公里/小時，自上料混凝土攪拌罐車的車速應在50－80公里/小時以內。同時，在起步前不要讓發動機怠速運轉太長時間，30秒左右即可起步。初駛期300公里以內應避免緊急制動。

2. Driving speed: drive at a low speed as far as possible during the running in period. In general, the maximum speed of truck mixer should not exceed 45 km / h, and the maximum speed of truck mixer should be within 50-80 km / h. At the same time, do not let the engine idle for too long time before starting, and start in about 30 seconds. Emergency braking should be avoided within 300 km of the initial driving period.

新購攪拌車磨合期內的駕駛規定

Driving regulations of newly purchased mixer during running in period

1、新購攪拌車保持起步平穩，避免猛踩油門，且不要使發動機轉速過高。

1. The newly purchased mixer should keep a smooth start, avoid stepping on the accelerator and don't make the engine speed too high.

2、新購攪拌車起步前，水溫應達到50℃以上。以低擋起步，1公里以后換入高擋，行車中水溫應控制在80℃－90℃。

2. Before starting the new mixer, the water temperature should be above 50 ℃. Start at low gear and shift to high gear 1 km later. The water temperature should be controlled between 80 ℃ and 90 ℃.

3、新購攪拌車行進中及時換擋，不要長時間使用一個擋位，也不能使用高速擋低速行駛或使用低速擋高速行駛。

3. When the new mixer truck is moving, shift gears in time. Do not use a gear for a long time, nor use high gear to drive at low speed or use low gear to drive at high speed.

4、新購攪拌車選擇良好路面，避免過大振動、沖撞或緊急制動。制動前，應先分離合器。

4. New purchase mixer choose good road surface to avoid excessive vibration, collision or emergency braking. Before braking, the clutch should be disengaged.

5、新購攪拌車選用優質的燃油及機油，不宜使用發動機耐磨添加劑。

5. High quality fuel and engine oil should be selected for the newly purchased mixer, and the engine wear-resistant additive should not be used.

6、新購攪拌車不要盲目拉高速，“新車就像一個新生嬰兒，在磨合期內要輕加速、輕加油，避免急加油、急加速，還要避免過高的負荷。”現在的汽車制造工藝非常精細，一些攪拌車友所說的新車拉高速，特別是極速行駛，完全沒有必要。可以將新車開到高速公路上勻速行駛一段時間，時速更好保持在90-100公里，行駛百公里甚至數百公里，這樣有利于發動機各部件得到較充分磨合，但不能極速行駛，那樣只會損壞發動機。

6. Don't blindly speed up the new mixer. "The new car is just like a newborn baby. During the running in period, you should accelerate and refuel gently, avoid rush refueling and acceleration, and avoid excessive load." Now the automobile manufacturing process is very fine. It is unnecessary for some agitators to drive new cars at high speed, especially at extremely high speed. The new car can be driven on the highway at a constant speed for a period of time. It is best to keep the speed at 90-100 km / h and drive for 100 km / h or even hundreds of km / h. This is conducive to the full running in of various parts of the engine, but it can not be driven at extreme speed, which will only damage the engine.

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