马虎引起敲击声两侧一台桂花牌手扶拖拉机检修后，开出公路约３公里，柴油机气缸内便发出十分刺耳的金属敲击声。机手估计是活塞撞气门，就停下车来找原因。拆卸气缸盖检查，发现活塞顶几处四坑，另一处抓粘一直径为４毫米的焊渣，气缸盖近镶块处被撞裂。原来机手在一家路... Sloppy sound caused by a percussion on both sides of a Guihua licensed tractor maintenance, out of the road about 3 km, diesel engine cylinder will issue a very harsh metal percussion. Estimated to be the hands of the piston striker, stopped to find the reasons for the car. Remove the cylinder head inspection and found that the top of the piston at four pits, the other grab a diameter of 4 mm welding slag, cylinder head near the block was cracked. The original machine in a road