SLUG Block Change-out Procedures
Welcome to another FSI instructional video on the proper procedure for changing out a slug block. These easy but
critical steps will ensure the proper and safe operation of your slug gun. Before beginning, make sure all ball valves at the gun head are in the off, or closed position. The mix tube and mix tube adapter need to be removed. Unpack, the new or reconditioned block. Fill out the block reconditioning request form and send it back with a block that needs repair. We also recommend replacing the rod with each block change out. To begin the procedure, remove the quarter inch clear air tube from the hose barb.
Next, remove the plastic plugs from the block face, to access the head bolts. Loosen the bolts to remove the air bracket assembly. Then unscrew the wing bolts to remove one of the wings. Wipe off the wing and place it into a rubber glove or plastic bag to catch any residual chemical that might run out. This will help keep residual chemical off other parts and assist in keeping your gun clean. Repeat the process for the other wing. Loosen and remove the head bolts so the block can be detached from the air cylinder.
Next, slide the safety valve forward to the on position and trigger the gun twice. The block should detach from the head assembly. If the block does not detach, place a wrench, dowel, or other tool between the block, and the grease collar, and trigger the gun twice again. If the block still doesn’t detach, first, try pulling it off with your hands. If unsuccessful, please call the FSI technical service department for assistance. If you are changing out a spring block, be sure to remove the five spring washers and brass bushing. After removing the block, remove the grease collar and clean off the old grease from the rod. Remove the old rod using two half-inch open end wrenches. Lubricate the threads of the new rod with petroleum jelly and attach the new rod.
Tighten the rod using two half-inch open end wrenches. Remove the tape from the new block and inspect it to ensure that all chemical orifices are free of debris and shards. Ensure the old grease and debris are removed from the grease collar. Then lubricate both the front and back sides of the grease collar. Lubricate the rear side of the new block and attach the grease collar. Make sure the grease fitting on the grease collar points upward when lining up. Then lubricate the head bolt threads, and insert them through the new bloc, and collar. Slide the safety valve back to the off position, and push the rod back so it is locked in the retracted position.
Push the new block onto the rod and thread the bolts so the block is aligned. If you are changing out a spring block, take special care to insert the brass bushing. First, into the slug block. Followed by the five spring washers exactly as illustrated on the spring block reconditioning request form. Tighten the head bolts to the air cylinder. Alternate between head bolts to tighten the block evenly using the same number of turns on one head bolt, and then the other. Push the safety forward to the on position and trigger the gun several times to ensure the rod extends and retracts properly. Now pull the safety to the back position to lock the rod in the back position.
Next, remount the chemical orifices with the appropriate drill bit. As shown in this chart, the correct drill bit size has also stamped in the lower left corner on the bottom of the block. Now, push the safety valve forward to the on position to force the rod forward. Then, pull the safety back to the off position to avoid an accidental trigger.
Next, grease the gun through the fitting until grease comes out of the hole on the bottom of the block. Now, lubricate the wings, block, and wing bolt threads. Then reconnect both wings, remove the hose barb from the old block, and replace it on the new block. Make sure the hose barb is clean and free of debris. Replace the hose barb if necessary. Reconnect the air bracket assembly, and tighten the bolts. Then, reconnect the clear air tube. Replace the air tube if it is not clean and free to allow sufficient airflow. Secure the air tube to the hose barb with a wire tie.
Now the block change out procedure is complete. Finally, remember to return the used block to FSI for reconditioning. Be sure the block reconditioning request form is complete. Please indicate your preferred method of return shipping for your new block. If none is selected, we will use the same shipping method you used when sending to us. If you have any questions at all about the slug block change-out procedure, please call the FSI technical service department at, 1-800-325-4875. International customers at, +1-314-344-3330. We are always ready to help our valued customers any way we can.