The repair steps are as follows:
First, blow up the air shaft and hang the dowel with a wire;
Second, remove the air nozzle and then remove the hex screws around the air nozzle with an inner hex wrench;
Third, with a screwdriver or a hard small iron roller, in the position of the air nozzle to knock out the shaft head;
Fourth, take out the shaft head and air bag part and untie the two small wire. Then remove the leakage air bag and replace it. The new air bag is tied with wire at both ends.
Fifth, Put the replaced airbag into the cylinder. After the air nozzle and hexagonal screw position is aligned, knock in and install the air nozzle and hexagonal screw. It’s done.