What action will not create a change in stability while operating a crane?

Pulling off a fixed load does not create a change in stability because it involves detaching a load that is securely anchored and does not alter the crane’s center of gravity or its overall balance. The crane's stability largely depends on the distribution of weight and the position of the load relative to the crane’s base. When a load is fixed, removing it will not impact the crane's balance, as the forces acting on the crane remain consistent.

In contrast, moving the crane, raising the load, or swinging the load all affect the crane's stability. Moving the crane can shift its center of gravity and may impact the overall balance depending on the terrain and location of the base. Raising the load alters the distribution of weight and can increase the moment arm, affecting stability. Swinging the load also changes the load's position relative to the crane's pivot point, further impacting stability.