Your Ultimate Guide To The Jake Brake

A Jake Brake is a separate component installed on diesel engines. When engaged, it releases compressed air, using kinetic energy to slow the vehicle.

This is why truck drivers also refer to it as the “compression release brake”.

Basically, it puts resistance or drag on the crankshaft, and therefore on the tires, to slow the vehicle down.

It is not the same system as the service (foot) brakes, and will slow the truck when it is in gear and both throttle and clutch are released.

There are certain situations in which one should not use the Jake Brake. Understanding how to use a Jake Brake is critical for truck driver safety.

Truck Driver Safety

How To Use a Jake Brake

With winter approaching, it’s more important than ever to adhere to these truck driving tips regarding the Jake Brake.

Each truck’s Jake Brake and engine combination can be different, so check with your mechanic for the safe operating ranges of your truck.

Jake Brakes are great for controlling truck speed when descending a steep grade. This saves the foot brakes from wear. Many drivers also keep it on most of the time.

It’s a good idea to use them in the mountains, as it can add years of life to your foot brakes and save from wear and tear on tires.

If you choose to keep it on all of the time, slow your speed relative to road conditions to maintain traction.

The Jake Brake is incredibly helpful, and can be used in conjunction with foot brakes. 

Jake Brake Safety Tips for Truck Drivers

However, although the Jake Brake is a great tool, there are many situations when you should avoid using it, or use it with caution to maintain truck driver safety.

Most importantly, the Jake Brake is not designed to be used on ice or other slippery conditions.

Using the Jake Brake on slippery surfaces could cause your wheels to lock up and lead to a jackknife. This is due to the fact that the anti-lock braking system has no effect on the Jake Brake.

If you must use it in these conditions, be sure that the tractor-trailer unit is lined up before engaging.

Also, keep an eye out for road signs, as some municipalities and jurisdictions will have laws against the use of the Jake Brake for certain areas.

Here are some other safety tips for truck drivers:

-  Don't use your Jake Brake when shifting gears

-  Make sure you're not low on oil before using it

-  Don't use it when the engine is cold - give it time to warm up!

-  Before descending a long grade, briefly lift your foot off the throttle to check Jake Brake functionality

Road Safety

Truck driver safety and the safety of those around you depend on your ability to make good decisions on the road.

That’s why it’s important to stay educated on how to use a Jake Brake, and other truck driving tips.

TSNAmerica is here for you. For more trucking resources and information, check out our blog.

Stay safe out there!