When the crushing operation is broken,During crushing, because vibration will gradually change the direction of the hammer head, the bucket barrel should be adjusted at any time to make the direction of the hammer head perpendicular to the surface of the broken object.When the hammer head cannot drive into the broken object, the crushing position should be changed, and the continuous crushing in the following position should not exceed 1 minute, otherwise, not only the hammer head will be damaged, but also the oil temperature will rise abnormally;For hard objects, they should be broken gradually from the edges.It is forbidden to use hydraulic hammer horizontally or upward, which is broken when rotating and can be used as chisel when inserted into the hammer head and twisted.The purpose of regular maintenance of excavators is to reduce machine failures, extend machine service life, shorten machine downtime, improve work efficiency and reduce operating costs.As long as fuel, lubricants, water and air are properly managed, 70 per cent of failures can be reduced.In fact, about 70% of failures are due to poor management.