Why is it important to follow torque values for wheel bolts in landing gear?

• A. To reduce maintenance time
• B. To prevent wheel detachment or hub damage due to improper torque; ensures structural integrity under landing loads
• C. To improve aerodynamics
• D. To increase top speed

Answer: (B)

Torque values for wheel bolts are about ensuring the wheel remains securely fastened under the heavy, dynamic loads of landing and braking. When the bolts are tightened to the specified torque, the clamping force between the wheel, hub, and bolts holds the assembly together, distributing stresses evenly and preventing movement at the mounting surfaces. If they are under-torqued, the bolts can loosen during touchdown or braking, risking wheel detachment or hub damage as the wheel shifts under load. If over-torqued, the threads or bolts can yield, the mounting surface can crack, or the hub can be distorted, all of which threaten wheel retention. The correct torque also accounts for lubrication and the specific materials and design of the hub, ensuring the right friction so the clamp load stays within safe limits through repeated cycles. In short, following torque values prevents wheel detachment or hub damage and maintains structural integrity under landing loads. Other aims like reducing maintenance time, improving aerodynamics, or increasing top speed aren’t addressed by wheel-assembly torque; safety and integrity of the mounting are the focus.