If tilt-blocks or bed wedges are not lowered when traveling locomotive cranes around curves, the primary concern is the loss of stability. When traveling on a curve, the crane's center of gravity changes, and if the tilt-blocks or bed wedges are not adjusted accordingly, the crane can tilt or become unbalanced. This instability increases the risk of tipping over or losing control, especially on uneven surfaces or when navigating sharp turns.
Incorporating tilt-blocks and bed wedges helps to ensure that the crane's load is distributed evenly and that the structure remains stable throughout the turning motion. Properly managing these components is crucial for maintaining safe operations, as they help to counteract the forces that can lead to tipping or misalignment.
Other answer choices, while related to crane operation, do not directly address the specific risks associated with failing to lower tilt-blocks or bed wedges when navigating curves.