handrem

Handrem, also known as a parking brake or emergency brake in many languages, is a secondary braking system used in motor vehicles to hold the vehicle stationary when parked and to provide an auxiliary braking function if the primary braking system fails. It is distinct from the service brakes and is designed to operate independently of the foot pedals.

Most handbrakes are mechanical and rely on a lever or a push handle located inside the vehicle. The lever is connected to a set of steel cables that run to the rear wheel brakes, typically drum or disc brakes, applying friction to hold the wheels stationary. In modern vehicles, electronic parking brakes (EPBs) replace or supplement the mechanical lever with an electronic switch and actuators that engage the rear brakes. Some trucks and older cars use a foot-operated parking brake, though this is less common in passenger cars today.

Using the handrem involves engaging the mechanism when the vehicle is stopped or parked, usually by pulling the lever until a resistance and a click are felt or by activating the EPB switch. Releasing the handrem requires either pressing a release button or applying a small amount of force while releasing, depending on the system. It should be used in addition to, not as a substitute for, the regular braking system when parking on slopes, and never relied upon to stop a moving vehicle.

Maintenance tasks include checking for smooth operation, ensuring the cables are properly tensioned, inspecting for corrosion, and replacing worn brake components. Inadequate adjustment or sticking can reduce holding power and safety. Some regions require a functional handrem as part of the standard braking system and conduct periodic inspections.