The bearing cap just pushes on - use either a big pair of pliers to grab it and wiggle it off or a wide bladed screwdriver to pry it off. If the wheel is loose, loose the bearings may be bad.

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Houston, Texas
1984 300CD 235K miles, Elvira, one owner
1987 300TD 180K miles
1974 TR6 78K miles Sarah Jane, one owner
OBK #27