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 screwdriver Remove 408-200-8A using a standard screwdriver Thread 410-45-2 into 408-200-8A using xx wrench Insert TR-2237 into push-lock connections of TR-2232 and 410-45-2. Insert TR-2232 into air supply, 60-80 psi air pressure 408-200-9A 408-200-8A (internal threads) 410-45-2