Golf Carts negotiate with uneven terrain, and loosening of the steering wheel is natural over time.
Most of this happens when the cart is facing a hard surface.

1.Maybe the bearing slops and tie rods are loose.
PS:The tie rods could be inspected by uncoupling and turning steering wheel each side and then centering it.
2.Kingpins and spindles under the steering box maybe loose.
3.The top and bottom bushings of the steering wheel may be loose.
Bushings are located in the aluminum housing above the internal tie rods.
4.Pinion and rack arrangement of the steering wheel maybe worn out or loose.

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