What is a retarder?

A retarder is a device used in trucks and buses to assist in controlling the vehicle's speed, especially when going downhill. It works by using hydraulic resistance to slow the vehicle down without the need for the driver to continuously apply the brakes.

Retarders are often used in combination with a vehicle's braking system to help reduce wear and tear on the brakes, prevent overheating, and improve overall safety on the road.

There are different types of retarders available, including hydraulic, electric, and exhaust brake retarders. Each type has its own set of advantages and disadvantages, so the best choice will depend on the specific needs of the vehicle and its intended use.

Overall, retarders are a useful tool for commercial vehicles, particularly in hilly or mountainous terrain, where maintaining control of speed and braking is crucial for safe driving.