The maintenance taboo of engineering machinery must not be forgotten

When repairing engineering machinery and equipment, there are some maintenance taboos that must not be forgotten. Some customary mistakes in assembly and disassembly will not only affect the quality of mechanical maintenance, but also may cause hidden trouble in the later use of equipment.

Such as when disassembling the engine cylinder cover, cylinder head cracks easily lead to deformation; in the installation of piston pin and piston, without heating directly to the piston pin into the pin hole, causing the piston deformation increases ovality increase; crankshaft main bearing connecting rod or back with copper pad or pad of paper, easy to plug the oil, resulting in burning tile axle accident; in the maintenance of diesel engine when excessive scraping bearing, the bearing surface of the antifriction alloy layer was scraped, resulting in bearing steel back and crankshaft friction wear early; remove bearing, pulley does not fit the use of machines parts, hard hit hard knock, easily lead to deformation or damage parts; opening new piston, cylinder, nozzle, plunger and other parts, parts of the surface with fire sealed oil or wax, to change the performance of the parts are not conducive to the use of spare parts.

All of these cases are caused by the neglect of the maintenance workers. These erroneous maintenance habits may cause the new replacement parts to fail, so we must pay attention to our friends.