一、气门弹簧的拆装气门弹簧一旦折断或因弹力不足需要更换时，机手往往将气缸盖拆下后再更换，这样做既费时又费力。现介绍一种方法：减压后缓慢摇转曲轴，使活塞处于压缩上止点位置，将飞轮固定不动，然后用专用工具或用两根小铁棍将气门弹簧压下，因活塞处于上止点位置... First, the valve spring disassembly Once the valve spring break or due to lack of elasticity need to be replaced, the hand often remove the cylinder head and then replace, this is both time-consuming and laborious. Now introduce a method: Shake the crankshaft slowly after depressurization, so that the piston in compression top dead center, the flywheel fixed, and then use special tools or with two small iron bar valve spring pressure, because the piston is on Stop position ...