When replacing the cylinder liner and piston of full-automatic mixer truck, it is considered that the new cylinder liner and piston are standard parts and interchangeable, so they can be used after being installed. In fact, the dimensions of cylinder liner and piston have a certain tolerance range. If a large cylinder liner is equipped with a small piston, the matching clearance will be too large, resulting in weak compression and difficult start.

因此，換裝時必須要檢查標準缸套與活塞的尺寸分組代號，裝用的缸套和活塞必須使標準活塞的尺寸分組代號與標準缸套的尺寸分組代號相同，只有這樣才能保證兩者之間具有標準的配合間隙。

Therefore, it is necessary to check the size grouping code of standard cylinder liner and piston during replacement. The installed cylinder liner and piston must make the size grouping code of standard piston the same as that of standard cylinder liner. Only in this way can we ensure that there is a standard fit clearance between them.

另外，各缸裝用同一分組代號的缸套和活塞的同時，還要注意裝前檢驗缸塞間隙，為了保證裝配標準，在裝機前還應進行一次檢測，以防裝上假冒偽劣的殘次產品。

In addition, while installing cylinder liners and pistons with the same group code, pay attention to the inspection of cylinder plug clearance before installation. In order to ensure the assembly standard, a test should be carried out before installation to prevent the installation of fake and inferior defective products.

此外在全自動攪拌車的調試中，很多維修人員不注意檢查攪拌車的行程余量。所謂攪拌車的行程余量，是指攪拌車被凸輪軸上的凸輪頂至上止點后，還能繼續上行的移動量。調好供油開始時間后，之所以還要檢查行程余量，是因為攪拌車的行程余量與攪拌車、套筒的磨損有關。

In addition, during the commissioning of automatic mixer truck, many maintenance personnel do not pay attention to checking the travel allowance of mixer truck. The so-called stroke margin of the mixer truck refers to the amount of upward movement of the mixer truck after it is pushed to the top dead center by the cam on the camshaft. After adjusting the start time of oil supply, the reason why the travel allowance should be checked is that the travel allowance of the mixer truck is related to the wear of the mixer truck and sleeve.

攪拌車與套筒磨損后，攪拌車要往上多運動一段才能開始供油，從而使供油開始時間推遲。當擰出調整螺栓或換用較厚的調整墊塊、墊片后，攪拌車的 低位置上移，使攪拌車的行程余量減小。所以，在維修調試噴油泵時，應檢查此行程余量，以判定噴油泵是否還允許調整。

After the mixer truck and the sleeve are worn, the mixer truck needs to move upward for a long time to start oil supply, which delays the start time of oil supply. When the adjusting bolt is screwed out or the thicker adjusting cushion block and gasket are replaced, the low position of the mixer truck is moved up to reduce the stroke margin of the mixer truck. Therefore, when maintaining and debugging the fuel injection pump, check the stroke allowance to determine whether the fuel injection pump is still allowed to be adjusted.

檢查時，應根據的不同結構采用下述不同方法：轉動凸輪軸，將攪拌車頂至上止點后，拆下出油閥及閥座，用深度游標尺測量。攪拌車被頂至上止點后，用螺絲刀撬起攪拌車彈簧的彈簧座，使攪拌車上升到高點。然后用厚薄規插入攪拌車下平面與挺桿調整螺栓之間測量。

During the inspection, the following different methods shall be adopted according to the different structures of the fuel injection pump: rotate the camshaft, put the mixing roof to the top dead center, remove the oil outlet valve and valve seat, and measure with a depth vernier. After the mixer truck is pushed to the top dead center, pry up the spring seat of the mixer truck spring with a screwdriver to make the mixer truck rise to the high point. Then insert a thickness gauge between the lower plane of the mixer truck and the tappet adjusting bolt for measurement.

攪拌車缸套和活塞新品不經選配即安裝的后果便是以上內容了，如果您有更多想了解的內容就來網站www.www.boy7up.cn進行咨詢吧。

The consequences of installing new cylinder liners and pistons of mixer trucks without matching are the above contents. If you want to know more, please visit www.www.boy7up.cn Com.