Before activating the axle differential lock, the operator should always come to a complete what?

The correct answer is to come to a complete stop before activating the axle differential lock because this practice ensures the safety and stability of the telehandler. Engaging the differential lock while the machine is in motion can lead to excessive strain on the drivetrain, potentially causing mechanical failures or loss of control. The differential lock is designed to help provide traction in slippery or uneven conditions by locking the wheels together, but it works best when the machine is stationary, allowing for smooth engagement without the risk of damaging components. Therefore, stopping completely prior to this action is crucial for effective operation and maintenance of the equipment.