发动机的故障一般都有早期征兆，开展预防维修工作，能有助于及时发现这些征兆，并针对这些问题采取必要的措施，改善维护保养工作，监测故障征兆是否消失或扩展，或选取最佳的维修方案，在征兆米扩展之前把故障排除掉。故障前修理发动机，大部分可以在机架上进行，不需送厂或 Engine faults usually have early signs of preventive maintenance work can help to detect these signs in a timely manner, and to take the necessary measures to address these problems, improve maintenance work, monitoring failure symptoms disappear or expansion, or select the best Repair program, troubleshooting before expiration of meters. Repair engine before failure, most can be carried out in the rack, without sending factory or