Truck
1
Air Brake Test

There are three stages to an air brake test:

Applied Pressure Test

When doing the Applied Pressure Test, you will want to build the air pressure to governor cut out. Put the truck in the lowest gear, turn the engine off and immediately turn it back on. Push in the tractor and trailer valves which will then release the parking brakes. Push and hold the brake pedal, allowing the gauges to stabilize. When the gauges have stabilized, announce the Primary and Secondary PSI. Listen for air leaks while doing this

Warning Light and Buzzer

Pump down on the brake pedal until the warning light and buzzer comes on. This is typically at or before 60 PSI.

Tractor/Trailer Protection Valve Pop Out

Pump down on the brake pedal until the tractor and trailer protection valves pop out, this will be between 20 and 40 PSI.

2
Air Pressure Gauges

The air pressure gauges should build to governor cut out

3
Emergency Equipment

Your truck should have a fire extinguisher, three red reflective triangles and spare electrical fuses

4
Heater and Defroster

Demonstrate both the heater and defroster are working properly.