first thing you need to do is get TM 9-8024 ,operator maintainance manual,2nd thing,if the hubs have been painted over multiple times like most mvs have,the tapered dowels ,as the TM refers to them as,have a ring of paint built up around them,take off the nuts and use a small screwdriver to chip the paint loose around the dowels,dont drive a screwdriver in them at this point as you will only compound the problem by forcing them into the hub flange,after you take nuts,chip paint ,pressure wash or use air hose to blow off residue,douch e them with WD-40,and then fix yourself a cup of coffee,wait and then bump them with a,hammer.highly recommend you get the proper manuals fort this truck.Also VERY IMPORTANT ,the 4 rear axles have a small cork seal in the keyway on the rear axle housing ,these should be replaced ,because if you dont the 90 wt gear lube in the differentials will wash the grease out of the axle bearings,resulting in failed bearigs,and an expensive fix,do yourself a favor and get the manuals.and, READ EVERYTHING BEFORE YOU DO ANYTHING,good luck and keep posting,help and knowledge is only a post away