What mechanism makes the brakes work when the brake pedal is released?

The correct answer highlights a specific type of braking mechanism that is particularly designed for reach lift trucks. In these vehicles, when the brake pedal is released, a brake device is utilized to disengage the brakes automatically. This is crucial for ensuring that the forklift can safely maneuver and that the brakes apply firmly when needed.

Reach lift trucks often operate in tight spaces where precise control is necessary. The brake device is engineered to respond quickly and efficiently to the operator's inputs, making it an integral part of the truck's safety and operational systems.

Hydraulic systems, mechanical linkages, and electronic control units are also used in various braking systems, but they do not specifically define the unique braking response of reach lift trucks like the brake device does. Each of those systems may serve different types of forklifts or applications, but when it comes to reach lift trucks, the dedicated braking system provides the appropriate functionality for their specific operational needs.