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　　These factors may lead to premature engine failure

　　1、氣門(mén)的光磨在自動(dòng)上料攪拌車(chē)的維修中，如果氣門(mén)出現燒蝕、麻點(diǎn)及凹陷時(shí)，均應進(jìn)行光磨，一般是在光磨機上進(jìn)行，作業(yè)時(shí)需要注意四個(gè)問(wèn)題：一是保證氣門(mén)頭與桿部同心，否則應先校直；二是光磨輛在能磨出完整的錐面的前提下是越小越好；三是盡量提高表面光潔度；四是氣門(mén)桿端部凹陷應予以磨平。

　　1. In the maintenance of the automatic feeding mixer, if the valve is ablated, pitted and sunken, it should be polished. Generally, it is carried out on the smooth mill. Four problems should be paid attention to during the operation: first, ensure that the valve head is concentric with the rod, otherwise straighten it first; second, the smaller the smooth grinding vehicle can grind out the complete conical surface, the smaller the better; third, try to improve the meter The fourth is that the end depression of valve stem should be ground smooth.

　　2、氣門(mén)導管的鉸銷(xiāo)氣門(mén)桿與氣門(mén)導管配合間隙是決定氣門(mén)導管使用壽命的關(guān)鍵，因此當更換新的氣門(mén)導管時(shí)，鉸銷(xiāo)時(shí)應嚴格掌握好配合間隙，使用各攪拌車(chē)車(chē)型規定間隙的下限，可有效延長(cháng)使用壽命。

　　2. The fit clearance between the hinge pin and the valve guide of 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. Using the lower limit of the clearance for each mixer can effectively prolong the service life.

　　3、氣門(mén)的研磨氣門(mén)的研磨分為兩種情況：一是氣門(mén)與氣門(mén)座只有輕微麻點(diǎn)，不需要光磨和鉸銷(xiāo)時(shí)的研磨；二是氣門(mén)與氣門(mén)座均經(jīng)過(guò)光磨和鉸銷(xiāo)后的研磨。前者先用足金鋼砂研磨，將麻點(diǎn)研磨掉后，再用細金剛砂研磨，涂上機油研磨，直密封符合要求，寬度符合規定為止。后者只有密封性達不到要求時(shí)才進(jìn)行研磨，但操作時(shí)要注意，不要過(guò)分用力，嚴禁將氣門(mén)上下敲打，否則將出現凹形砂痕，影響維修質(zhì)量。

　　3. The grinding of valve can be divided into two situations: one is that there are only slight pockmarks between the valve and the valve seat, and there is no need to polish and ream the pin; the other is that both the valve and the valve seat are polished and grinded after hinge pin. The former is first ground with full gold steel sand, after grinding off the pitting, then grind with fine emery and oil until the sealing meets the requirements and the width meets the requirements. The latter can only be grinded when the sealing performance can not meet the requirements. However, attention should be paid not to use too much force. It is strictly forbidden to knock the valve up and down, otherwise concave sand marks will appear, which will affect the maintenance quality.

　　以上是關(guān)于影響攪拌車(chē)發(fā)動(dòng)機過(guò)早損壞的因素，希望大家能多加注意，如您想要了解更多內容歡迎點(diǎn)擊自動(dòng)上料攪拌車(chē)http://m.jackpetty.net官網(wǎng)。

　　The above is about the factors that affect the premature failure of the mixer engine, I hope you can pay more attention, if you want to know more, welcome to click the automatic feeding mixer http://m.jackpetty.net Official website.