Axle 8 3/4 end play adjustment

i've done some searching and can't find exactly how to do this. Can someone explain how the procedure is done? I see what you adjust it with but don't know how to turn it. Is it something you tap around with a hammer and screwdriver or what?


Also...do I need the foam seals where the axles bolt to the backing plate? There was one on the passenger side but nothing on the driver's side. Can I silicone this w/ ATV?