压路机在工作过程中突然表现无力，停机后不能再起动我们先查电路系统，看马达是否有电，确认有电后再次起动，结果马达只是“哈贴”响，表明带不动飞轮。拆下马达直接试验，结果一切正常。接着正、反向撬动飞轮，飞轮不转。进一步分析，可能有以下几种原因：发动机气门被顶死 Roller suddenly appeared in the work process weakness, can not start after the shutdown We first check the circuit system to see if the motor has electricity to confirm the start again after the power, the result of the motor is only “Ha paste” ring, indicating that with fixed flywheel. Remove the motor direct test, the results of all normal. Then positive and negative pry flywheel, flywheel does not turn. Further analysis may be for the following reasons: Engine valve is dead