When decelerating a diesel engine, forward momentum kinetic energy continues to push the engine forward. The Jake Brake is an engine brake designed to use engine compression to slow the vehicle.

A diesel motor home is usually longer and heavier than a gas motor home, and in many instances, will also include a tag axle. Because of their added length and weight, diesel motor homes require extra stopping distance. The diesel coach will most likely include air brakes, but if a Jake Brake is available, learning how to properly use this system will help to provide extra braking without running the risk of overheating the disc or drum.

The Jake Brake system can be used in town, highway driving and over steep grades. Most Jake Brake systems have a high/low switch. The low setting operates the engine brake on 3 cylinders; the high setting uses 6 cylinders.

When you want to activate the Jake Brake, engage the switch and release the throttle. The throttle must be in the idle position before the Jake Brake will operate.

Control of the Jake Brake system may be provided by an on/off switch at the driver's side console or through a switch on the driver's side floor. Engaging the on/off control switch will generally activate the system until you turn the switch to off. The floor switch system must be held down to keep the system activated. Transmission downshift will be audible when the Jake Brake is engaged. Release your foot from the floor throttle when the engine has reached the desired speed.

Learn how to use the Jake Brake system before you need it. Practice while driving in light traffic conditions on level terrain. You may also want to consider adding a separate braking system for your tow vehicle to provide additional braking power.