YN—30型(包括YN—30A型)内燃凿岩机在使用过程中,起动器弹簧最易折断。造成起动器弹簧折断的原因主要有两个方面:一是拆卸保养凿岩机后,在安装起动器弹簧时方法不当,造成损坏;二是有些起动器弹簧热处理工艺也有欠缺之处。为了帮助凿岩机使用单位最大限度地发挥该机的技术性能,减少故障,下面简要介 Type YN-30 (including YN-30A) internal combustion rock drill during use, the starter spring is most likely to break. There are two main reasons that cause the starter spring to break: First, it is improper to install the starter spring after dismantling and repairing the rock drill, resulting in damage; second, some spring heat treatment processes of the starter also have defects. In order to help the rock drilling rig use the unit to maximize the technical performance of the aircraft and reduce the failure, the following brief introduction