Small concrete mixer truck is indispensable in the transportation of some industries. However, recently, many users have asked us why its work efficiency is getting lower and lower. The reason for this situation may be due to the lack of timely maintenance and repair, or perhaps due to the lack of proper maintenance. I believe that the proportion of the latter should be very large What are the maintenance taboos?

1、忌机油只加不换

1. Do not change the engine oil

机油在柴油机的使用中是必不可少的，主要作用是润滑、冷却、清洁等。因此，很多小型混凝土搅拌车驾驶员都会注意检查润滑油的油量，且按标准添加，但是却忽略了润滑油质量的检查和对已经变质机油的及时更换，而导致一些发动机的运动机件总是在较差的润滑环境中运转，加速了各机件的磨损。

Engine oil is essential in the use of diesel engine, the main role is lubrication, cooling, cleaning and so on. Therefore, many small-scale concrete mixer drivers will pay attention to check the amount of lubricating oil and add it according to the standard, but they ignore the inspection of lubricating oil quality and the timely replacement of deteriorated engine oil. As a result, some moving parts of the engine always operate in poor lubrication environment, which accelerates the wear of various parts.

2、混凝土商砼车忌缸套和活塞新品不经选配即安装

2. It is forbidden to install the new cylinder liner and piston without matching

在换装汽缸套和活塞时，认为新的汽缸套和活塞都是标准件，具有互换性，装上去就能使用了。而实际上，汽缸套与活塞的尺寸都是有一定的公差范围。如把尺寸的汽缸套配上小尺寸的活塞，会使配合间隙太大，造成压缩无力，而启动困难。因此，小型混凝土搅拌车在换装前一定要检查标准缸套与活塞的尺寸分组代号，装用的缸套与活塞必须使标准活塞的尺寸分组代号与标准缸套的尺寸分组代号一样，这样才能保证两者之间具有标准的配合间隙。

When replacing the cylinder liner and piston, it is considered that the new cylinder liner and piston are standard parts, which are interchangeable and can be used after installation. In fact, the dimensions of cylinder liner and piston have certain tolerance range. If the largest cylinder liner is fitted with the smallest piston, the fit clearance will be too large, resulting in weak compression and difficult start-up. Therefore, the small concrete mixer truck must check the size group code of standard cylinder liner and piston before replacement. The cylinder liner and piston used must be the same as the standard cylinder liner size group code, so as to ensure the standard fit clearance between them.

3、水泥运输车忌不检查柱塞行程余量

3. Do not check plunger travel allowance of cement transport vehicle

柱塞的行程余量，就是指柱塞被凸轮轴上的凸轮顶上止点后，能继续上行的移动量。调好小型混凝土搅拌车的供油开始时间后，之所以要检查行程余量，是因为柱塞的行程余量与柱塞和套筒的磨损有关。

The stroke allowance of plunger refers to the amount of movement that the plunger can continue to move upward after it is driven by the cam top on the camshaft to the top dead center. After adjusting the start time of oil supply for small concrete mixer, the reason why it is necessary to check the stroke allowance is that the stroke allowance of plunger is related to the wear of plunger and sleeve.

小型混凝土搅拌车在保养时也要会保养才可以，错误的保养方法不仅会使设备的质量有所下降，严重的可能会损坏某些零件，这在很大程度上降低了它的使用寿命，那么希望通过今天的学习，大家在日后的保养时一定要注意，千万不要犯同样的错误。

Small concrete mixer in the maintenance can also be able to maintain, the wrong maintenance method will not only make the quality of the equipment decline, serious may damage some parts, which greatly reduces its service life, so I hope that through today's study, we must pay attention to the maintenance in the future, never make the same mistake.