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，换装时必须要检查标准缸套与活塞的尺寸分组代号，装用的缸套和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相同，只有这样才能保证两者之间具有标准的配合间隙。

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，各缸装用同一分组代号的缸套和活塞的同时，还要注意装前检验缸塞间隙，为了保证装配标准，在装机前还应进行一次检测，以防装上假冒伪劣的残次产品。

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.

此外在全自动搅拌车的调试中，很多维修人员不注意检查搅拌车的行程余量。所谓搅拌车的行程余量，是指搅拌车被凸轮轴上的凸轮顶上止点后，还能继续上行的移动量。调好供油开始时间后，之所以还要检查行程余量，是因为搅拌车的行程余量与搅拌车、套筒的磨损有关。

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.

搅拌车与套筒磨损后，搅拌车要往上多运动一段才能开始供油，从而使供油开始时间推迟。当拧出调整螺栓或换用较厚的调整垫块、垫片后，搅拌车的 低位置上移，使搅拌车的行程余量减小。所以，在维修调试喷油泵时，应检查此行程余量，以判定喷油泵是否还允许调整。

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.

检查时，应根据的不同结构采用下述不同方法：转动凸轮轴，将搅拌车顶上止点后，拆下出油阀及阀座，用深度游标尺测量。搅拌车被顶上止点后，用螺丝刀撬起搅拌车弹簧的弹簧座，使搅拌车上升到高点。然后用厚薄规插入搅拌车下平面与挺杆调整螺栓之间测量。

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.

搅拌车缸套和活塞新品不经选配即安装的后果便是以上内容了，如果您有更多想了解的内容就来网站www.zkzsljbc.com进行咨询吧。

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.zkzsljbc.com Com.