Pre Trip Inspection Checklist
In Cab Inspection & Brake Check
Air Brake Test - There are three stages to an air brake test:
- 1. 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.
- 2. 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.
- 3. 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.
- Air Pressure Gauges - The air pressure gauges should build to governor cut out.
- Emergency Equipment - Your truck should have a fire extinguisher, three red reflective triangles and spare electrical fuses.
- Heater and Defroster - Demonstrate both the heater and defroster are working properly.
- Horns (Air Horn and City Horn) - Blow both horns to make sure they are working.
- Lighting Indicators - Check the left turn, right turn, four way flashers and high beams; also point these out on the dashboard.
- Safe Start - Make sure transmission is in neutral and then fully depress the clutch. Turn the key on, check the ABS light, announce when it comes on and off, and start the engine.
- Seat Belt - The seat belt should not be ripped or frayed and should adjust and latch properly.
- Oil Pressure Gauge - The engine oil pressure gauge should rise to normal operating range.
Parking Brakes - Two parts
- 1. Trailer Parking Brakes – Set the trailer brake, release the tractor brake, then tug lightly on the trailer.
- 2. Tractor Parking Brakes – Set the tractor brake, release the trailer brake and tug lightly on the trailer.
- Service Brake Check - Release both the tractor and trailer brakes. Drive at idle speed. Apply the service brake to make sure you come to a complete stop and that it doesn’t pull to the left or right when applying the brakes.
- Voltmeter - The voltmeter should be charging between 13 and 14 volts.
- Water Temperature Gauge - The water temperature gauge should also rise to normal operating range.
- Windshield and Mirrors - The windshield and mirrors must be clean, with no obstructions and in proper adjustment.
- Windshield Wipers and Washers - Demonstrate the wipers and washers are working properly by spraying the windshield.
Visit the complete pre trip inspection study guide: https://cdltrainingtoday.com/cdl-training-resources/cdl-study-guide/cdl-pre-trip-inspection/
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