i was tired last night lol, whatever way you turn, if the bearing gets louder, its on the inside wheel, when u go left, you pull on the left wheels and push on the right wheels and vice versa.
pulling on the wheel takes the tension off the worn bearing and it grumbles. Pushing on it usually shuts it up.
the new bearing should need pressed in using a g clamp and socket or a press, or a big vice. Or just swap the hub for one with a bearing fitted lol