How To Install Air Blast on a TOUGH GUN G1 Series Robotic Air-Cooled MIG Gun AIR BLAST KIT 508-A (does not include housing) Remove 408-200-9A using a standard screwdriverRemove 408-200-8A using a standard screwdriverThread 410-45-2 into 408-200-8A using xx wrenchInsert TR-2237 into push-lock connections of TR-2232 and 410-45-2. Insert TR-2232 into air supply, 60-80 psi air pressure408-200-9A408-200-8A (internal threads)410-45-2TR-2232