Sometimes sometimes do not impact the impact hammer is what reason
O ring wear can be replaced, the lubricating oil should be added in accordance with the required amount and viscosity; but after the stoma is clear, do not add grease on the relevant parts to prevent the adhesion of foreign objects, and then plug the hole.
Hammer cylinder impact, according to what you said, which generally consists of 2 types: O type sealing ring wear and clogging pores.
