FAQ: On A School Bus When Do You Turn The Retarder Off?

When should you turn the retarder off?

When your drive wheels have poor traction, the retarder may cause them to skid. Therefore, you should turn the retarder off whenever the road is wet, icy, or snow covered. 1.

What does a retarder do in a bus?

Retarders are used to further improve the braking performance on commercial vehicles. Like engine brakes, they are wear-free continuous brakes. Retarders relieve the service brake and increase the active safety and cost-effectiveness of commercial vehicles.

What are retarders on a school bus?

A retarder is a device used to augment or replace some of the functions of primary friction-based braking systems, usually on heavy vehicles. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from “running away” by accelerating down the hill.

What is the biggest enemy of vehicle brake systems?

This is also the ideal time to inspect and service the disk rotors or brake drums. Remember, heat is the braking system’s greatest enemy. Brakes that have over-heated at some point often result in warped rotors on disk-brake vehicles, and egg-shaped, out-of-round drums on drum brake vehicles.

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What is stab braking?

The stab braking method for emergency stops involves fully applying the brakes until they lock up. The brakes are then released until the wheels start rolling, then the process is repeated.

What are the 4 types of retarders?

Retarders are mechanisms in some vehicles that help slow the vehicle and reduce the need for braking. The four basic types of retarders are exhaust, engine, hydraulic, and electric.

What is the difference between a retarder and a Jake brake?

A retarder is a hydraulic or electromagnetic device fitted to the output of the transmission or on the driveshaft itself. An exhaust brake is a device that opens the exhaust valves at the end of the compression stroke so the engine cannot gain back the energy it used to compress the air into the cylinders.

Do retarders cause extra brake wear?

Retarders can be used to help slow a vehicle, reducing the need for braking and thus reducing brake wear. However, retarders should not be used on slippery roads because the retarders can cause the drive wheels to skid. B apply extra braking power to the non-drive axles. C help prevent skids and reduce brake wear.

Are brake retarders loud?

How Loud Is It? 80 to 83 dB(A), the range of a properly muffled engine brake, is within the same noise level range as a household garbage disposal, food blender or a diesel truck that is traveling at 40 mph (64.4 kph) and is 50 feet (15.2 meters) away [source: The El Toro Info Site].

Why are engine retarder brakes prohibited?

Be cautious if you’re using retarders/engine brakes on slippery road surfaces. Some can actually cause the drive wheels to lock up, stalling the engine, and can result in loss of control or even cause a tractor/trailer to jackknife.

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What is the first thing you should do when a low air pressure warning comes on?

The first thing to do when a low air pressure warning comes on is: Stop and safely park as soon as possible. The braking power of the spring brakes: Depends on the adjustment of the service brakes.

What is the correct way to slow down when driving a school bus?

4) When driving a school bus in low light or at night, you should always be able to stop within the distance you can see ahead of you. At night, low beams let you see about 250 feet ahead. During the day, fog, rain, or other conditions may require that you slow down to be able to stop in the distance you can see.

What does emergency braking mean CDL?

: a brake (as on an automobile) that can be used for stopping in the event of failure of the main brakes and to keep the vehicle from rolling when parked.

What is a retarding agent?

A retarder is a chemical agent that slows down a chemical reaction. It can be used to retard the chemical hardening of the surface, so that the top layer can be washed off to expose the underlying aggregate.

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