This is not simple but when you take all parts, cylinder, head, trigger, etc. out of the gun and use all of the new parts given it is rather easy. But you must remove all parts of which the cylinder was the unforeseen item for me to remove because it seemed rigid. You can pull it straight up and out. Once you do this follow the schematic for reassembly. The overhaul kit did stop my nail gun from losing air. My other problem was the piston stop on top of the schematic which is not included in this overhaul kit. I had blown up pieces of the piston stop inside the gun when opened. The piston stop lets the gun reset at the proper height to shoot the next nail. If the gun does not stop at the proper height so that the drive pin is above the next nail then the gun will not be able to shoot the next nail. The gun will have air pressure and shoot air but it won't be able to reset and shoot nails. The overhaul kit was needed and works great on a 10+ year old gun.Read full review
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