小型攪拌車在經過長時間使用后，發動機會出現一些狀況，維修數據應用不當等等，下面小編就來為您解說一番。

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.

小型攪拌車在的維修數據應用不當：

Improper application of maintenance data of small mixer truck:

在維修攪拌車中不能科學地選擇維修數據是造成機件早期損壞的重要原因。如氣門與氣門座接觸面寬度，規定進氣門為1~2。2mm，排氣門為1。5~2。5mm。但在維修中，人們往往認為寬一點比窄一點保險，習慣選用上限或接近上限值，因而剛修好的車氣門工作面寬度就已接近使用極限了。

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.

再如氣門腳間隙，一般汽車規定為0。2-0。25mm，但在維護調整中也誤認為間隙大一點比小一點好，因此超上限使用。實際上間隙過大，不但降低了發動機功率，而且還會出現敲擊聲（氣門口自）而早期損壞。

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.

此外在維修作業中，如氣門出現燒蝕、麻點及凹陷時，均應進行光磨（嚴重時需更換氣門）。通常在氣門光磨機上進行，作業時應注意四個問題：一是保證氣門頭與桿部同心，否則應先校直；二是光磨量在能磨出完整的錐面的前提下越小越好；三是盡量提高表面光潔度；四是氣門桿端部凹陷應予以磨平。

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.

氣門桿與氣門導管配合間隙是決定氣門導管壽命的關鍵，因此當更換新的氣門導管時，鉸削時應嚴格掌握好配合間隙，使用各攪拌車車型規定間隙的下限，可有效延長使用壽命。操作時一定要注意，不要過分用力，嚴禁將氣門上下敲打，否則將出現凹形砂痕，影響維修質量。

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.

小型攪拌車發動機維修數據不當的原因就講解到這里了，您對此有什么需求或者問題可以隨時來我們這里http://www.www.boy7up.cn進行咨詢！

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.www.boy7up.cn Consult!