小型搅拌车在经过长时间使用后，发动机会出现一些状况，维修数据应用不当等等，下面小编就来为您解说一番。

After a long time of use, the engine of a small mixer will have some problems, such as improper application of maintenance data, etc. The following sections will explain to you.

小型搅拌车在的维修数据应用不当：

Improper application of maintenance data of small mixer truck:

在维修搅拌车中不能科学地选择维修数据是造成机件早期损坏的重要原因。如气门与气门座接触面宽度，规定进气门为1~2。2mm，排气门为1。5~2。5mm。但在维修中，人们往往认为宽一点比窄一点保险，习惯选用上限或接近上限值，因而刚修好的车气门工作面宽度就已接近使用极限了。

Failure to select maintenance data scientifically in the maintenance of mixer truck is an important reason for early damage of parts. For example, the width of the contact surface between the valve and the valve seat is 1~2. 2mm, exhaust valve is 1. 5~2。 5mm。 However, in maintenance, people tend to think that a little wider is safer than a little narrower, and they are used to using the upper limit or close to the upper limit value, so the width of the valve working face just repaired is close to the limit of use.

再如气门脚间隙，一般汽车规定为0。2-0。25mm，但在维护调整中也误认为间隙大一点比小一点好，因此超上限使用。实际上间隙过大，不但降低了发动机功率，而且还会出现敲击声（气门口自）而早期损坏。

For another example, the clearance between valve feet is generally 0 for automobiles. 2-0。 25 mm, but in the maintenance and adjustment, it is also wrongly believed that a larger gap is better than a smaller one, so it is used beyond the upper limit. In fact, if the clearance is too large, not only will the engine power be reduced, but also there will be knocking sound (valve opening) and early damage.

此外在维修作业中，如气门出现烧蚀、麻点及凹陷时，均应进行光磨（严重时需更换气门）。通常在气门光磨机上进行，作业时应注意四个问题：一是保证气门头与杆部同心，否则应先校直；二是光磨量在能磨出完整的锥面的前提下越小越好；三是尽量提高表面光洁度；四是气门杆端部凹陷应予以磨平。

In addition, in case of ablation, pitting and depression of the valve during maintenance, it shall be polished (the valve shall be replaced in case of serious problems). Usually, it is carried out on the valve grinder, and four problems should be paid attention to during the operation: first, ensure that the valve head is concentric with the stem, otherwise it should be straightened first; Second, the smaller the polishing quantity, the better on the premise that the complete cone can be ground; Third, try to improve the surface finish; Fourth, the depression at the end of the valve stem should be smoothed.

气门杆与气门导管配合间隙是决定气门导管寿命的关键，因此当更换新的气门导管时，铰削时应严格掌握好配合间隙，使用各搅拌车车型规定间隙的下限，可有效延长使用寿命。操作时一定要注意，不要过分用力，严禁将气门上下敲打，否则将出现凹形砂痕，影响维修质量。

The fit clearance between the valve stem and the valve guide is the key to determine the service life of the valve guide. Therefore, when replacing a new valve guide, the fit clearance should be strictly controlled during reaming. The use of the lower limit of the specified clearance for each mixer model can effectively extend the service life. During operation, be careful not to exert too much force. It is strictly forbidden to knock the valve up and down, or concave sand marks will appear, which will affect the maintenance quality.

小型搅拌车发动机维修数据不当的原因就讲解到这里了，您对此有什么需求或者问题可以随时来我们这里http://www.zkzsljbc.com进行咨询！

This is the reason why the engine maintenance data of the small mixer is improper. If you have any needs or problems, please come to us at any time http://www.zkzsljbc.com Consult!