Learn how to adjust a manual slack adjuster for your CDL Air Brake Test.

Learn how to how to find the specific numbers for the CDL In-Cab Air Brake Inspection.

As part of your CDL air brake inspection, you must test the tractor protection valve & system.

Are you working toward a career as a truck or bus driver? Inspection of air brakes is 'MUST KNOW' - watch the video!

From a mechanical standpoint, modern air brake systems are unlikely to fail.

Learn about air brakes for combination vehicles in the state of New York.

Getting your CDL? Learn about air brakes in the state of New York here!

For both a road test & your daily pre-trip inspection you must determine if the air brakes are in adjustment.

mobi On an air brake system, the air dryer filters moisture and other contaminants from the compressed air. Watch the video!

Applying the service brakes and doing a leak test will often locate a ripped service brake diaphragm.

Getting your CDL? Learn about air brakes in the state of New York here!

Getting your CDL in the state of New York - watch this video to learn air brakes!

Like a thermostat on a furnace, the governor controls the compressor.

For an air brake exam; you must know how to test the compressor.

The brakes on your car are the same as air brakes, only the power source is different

All air brake systems have the same basic components.

Although air brakes are more-or-less buletproof these, like all braking systems, have one failing: BRAKE FADE.

Going west to or east from Vancouver on the Trans-Canada with a big vehicle. Learn about the Coquihalla summit.

Downhill braking is an essential--potentially life saving--skill for bus, truck & RV drivers.

There are 4 types of foundation brakes you must know for your CDL test.

OBSOLETE Independently applies and releases the trailer service brakes. Knowledge Test Question: This air brake control is not to be used for parking. Although most tractors are still equipped with hand valves, beyond a trailer service tug test, these air…

The system consists of the tractor protection valve and the trailer supply valve.

Activates the brake lights when a service brake application is made by the driver.

Applies the parking brakes of the air brake equipped vehicle indefinitely – if needed of course. The parking brakes are held in the “ON” position by the mechanical force of the springs; these spring parking brakes are held in the “OFF” position by system air…

Slack adjusters have three purposes: 1) To convert the forward linear motion of the push rod into rotary motion of the camshaft. The slack adjuster works on exactly the same principle as a box end wrench on a nut. 2) To act as a lever, thus generating greater…

Stores compressed air for braking and for other air operated accessories. The air tanks are the first fail-safe in the air brake system. In the unlikely event that the air compressor fell of the side of the engine, the air tanks (reservoirs) store enough air…

Warns the driver that system air pressure is critically low.

OBSOLETE Making a heavy service brake application while the parking brakes are applied. This is often an error of truck driving school students.

Allows the spring brakes to be manually released in an emergency - a dire emergency.

To stop the vehicle, brake linings rub against the brake drum. This action creates friction, converting the vehicle's forward energy of motion into heat energy, which stops the vehicle’s tires. If the tires have traction, the vehicle will come to a stop. The…

Brake faide is the only reason that a modern air brake system will fail.

The gauges are in either pounds per square inch (psi) or Kilopascals (kPa). These measure the amount of air pressure in the primary and secondary air tanks.

Convert air pressure into a strong mechanical force to apply the foundation brakes.

Using the pry bar method, confirm that the brake is in fact out of adjustment. After confirming that the brake is out-of-adjustment and it is equipped with a manual slack adjuster, complete the following steps to bring the brake back into adjustment. If one…

Depending on which province you're in, the air buildup time or compressor test has somewhat different paramenters. Still, all require that the diesel motor be at a fast idle. A fast idle on a diesel engine is between 900 &1200 rpm.

The National Safety Code madates that every driver of a commercial vehicle equipped with air brakes must check push rod travel every day. In many jurisdications, drivers are allowed to use the pry bar method; in others , they must use the applied stroke…

The National Safety Code madates that every driver of a commercial vehicle equipped with air brakes must check push rod travel every day as part of his/her pre-trip inspection. In some jurisdications, drivers must use the applied stroke method; in others, they…