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hello Im Niall Murphy Im the manager of service for armstrongs today Im here to discuss the outside mechanical seal replacement for our 4,300 vertical inline pump series the mechanical seal is the most critical service item in any pump its like hell do many of them in your time close attention to this video will allow for ease of installation of a replacement seal in the field while paying attention to your personal safety the Armstrong 4,300 split coupling pump design allows for the mechanical seal to be replaced without disturbing any of the major pump components or removing the motor to do this youll need just a few items from your toolbox youll need three hex drivers otherwise known as allen wrenches sizes 1/8 1/4 and 3/32 inch in addition you will need a 5/8 9/16 open end box a ratchet wrench a flathead screwdriver a pair of pliers a small pry bar and a small amount of non metallic compound a good routine is to setup a flat clean surface near your work site where you can p