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            520彩票 » CDL Training Resources » CDL Test Study Guide » Pre-Trip Inspection Checklist & Video

            Pre-Trip Inspection Checklist & Video

            Studying the Class A CDL pre-trip inspection guide is an important part of truck driver training. Before obtaining your Class A commercial driver’s license and getting a truck driving job, most states require students to pass a DOT pre-trip inspection test and a CDL general knowledge test. There are many items to be checked but the test is not as difficult as it seems. Studying our simplified class A pre-trip inspection checklist, taking classes at a local CDL training school and watching the video will get you prepared.

            Skip to video: Pre trip inspection video

            Each company’s pre-trip inspection varies slightly. Most likely you will have to do the coupling system, light check and in-cab inspections plus one of the remaining three sections.

            CDL Pre Trip Inspection Check-list

            Engine Compartment

            Print:

            What to Check For:

            When checking the engine compartment, you will always want to make sure the following components are properly mounted and secured. You should also make sure they are not cracked, bent or broken. The items you will need to check for include:

            Belt Driven Alternator

            Make sure all of the wires are connected. The belt should not be cracked or frayed and the free play on the belt should be between 1/2 to 3/4 of an inch.

            Belt Driven Water Pump

            The free play on the belt should be between 1/2 to 3/4 of an inch. Also check all the hoses running to and from the water pump to make sure nothing is leaking.

            Brake Chamber

            The brake chamber should not be leaking air.

            Brake Drum

            The brake drum should be properly mounted and secure.

            Brake Hose

            The brake hose is rubber, so it is important to make sure it is not leaking air.

            Brake Lining

            Check for oil or debris on the lining. There should be at least 1/4 of an inch of friction material.

            Caste Nuts and Cotter Pins

            Make sure all three caste nuts and cotter pins are present.

            Coolant Reservoir

            The reservoir should not leaking and must be filled to the manufacturer’s specifications.

            Drag Link

            Make sure the drag link is properly mounted and secure, and not cracked, bent or broken.

            Gear Box and Hoses

            The gear box and hoses should have no abrasions, bulges or cuts, and should not be leaking.

            Gear Driven Air Compressor

            Although the air compressor is hard to see, you must make sure it is properly mounted and does not leak.

            Gear Driven Power Steering Pump

            The steering pump is located in the same place as the air compressor and is also gear driven. Ensure the steering pump is not leaking.

            General Hoses (Passenger and Driver’s Side)

            The hoses should be secure at both ends. There should be no abrasions, bulges or cuts. Fluids run through these hoses, so it is important to make sure they are not leaking.

            Hub Seal

            The hub seal (or axle seal) should not be leaking and should be filled to the manufacturer’s specifications.

            Leaf Springs

            Make sure none of the leaf springs have shifted.

            Leaks

            Check for leaks under the truck.

            Lug Nuts

            There should be no lug nuts missing. Look for rust trails, powder residue and cracks around the bolt holes.

            Oil Level

            The oil level should be filled to the manufacturer’s specifications.

            Pitman Arm

            Make sure the pitman arm is properly mounted and secure. It should be not cracked, bent or broken.

            Power Steering Fluid Reservoir

            Make sure this reservoir is not leaking and filled to the manufacturer’s specifications.

            Rim

            The rim cannot have any unauthorized welds.

            Shock Absorber

            Make sure the shock absorber is not leaking. If it is leaking, the leak will be at the point where the top and bottom portion of the shock meet.

            Slack Adjuster and Push Rod

            With the brakes released and pulled by hand, the push rod should never move more than one inch.

            Spring Hanger

            The spring hanger should be properly mounted and secure.

            Steering Column

            Make sure the steering column is properly mounted and secure. It should not be cracked, bent or broken.

            Steer Tire

            Look for abrasions, bulges or cuts on the tread or sidewalls. Tread depth should have a depth no less than 4/32 of an inch. Tires must be properly filled to the manufacturer’s specifications. This can be checked with an air gauge.

            Tie Rod

            Make sure the tie rod is properly mounted and secure, not cracked, bent or broken.

            U-Bolts

            Make sure all are accounted for.

            Driver Door Fuel Area

            Print:

            What to Check For:

            Again it is important to make sure these items are properly mounted and secure. Look for cracks, bends, and breaks.

            Airbag

            The actual airbag is rubber, so it is important to check for abrasions, bulges, cuts and leaks, in addition to any missing mounting bolts.

            Axle Seal

            The axle seal should not be leaking and should be filled to the manufacturer’s specifications.

            Brake Chamber

            Make sure to mention the brake chamber is not leaking air.

            Brake Drum

            Make sure the brake drum is secured properly. Also look for cracks, bends and breaks.

            Brake Hose

            Check the brake hose at both ends to make sure it is not leaking air.

            Brake Lining

            There should be no oil or debris on the brake lining. There should be at least 1/4 of an inch of friction material.

            Catwalk and Steps

            The cat walk and steps should be clear of any loose objects.

            Door and Hinges

            Physically demonstrate that the doors open, close and latch properly. Door seals should not be worn, torn or rotten.

            Drive Shaft

            The drive shaft should not be twisted and the u-joints should be free of any debris.

            Drive Tire

            The tread and sidewalls should have no abrasions, bulges or cuts. The tread depth should be no less than 2/32 of an inch. Tires should be properly filled to the manufacturer’s specifications. This can be checked with an air gauge.

            Exhaust System

            The exhaust system should show no signs of leaks.

            Frame and Cross Members

            There should be no unauthorized holes or welds. Bundle up the cross members to ensure none are missing.

            Fuel Tank

            Fuel should not be leaking from the tank and the cap should always be on tight.

            Lug Nuts

            Rust trails could indicate loose bolts, while powder residue and racks around the bolts could mean the bolts have been over-tightened.

            Mirrors

            Mirrors should be clean for best visibility.

            Mud Flap

            Make sure the mud flap is secured properly. Also look for cracks, bends and breaks.

            Rim

            Make sure to mention there should be never be any unauthorized welds.

            Shock Absorber

            The shock absorber should be secure at both ends and not leaking. If it does leak, it will leak in the middle.

            Slack Adjuster and Push Rod

            With the brakes released and pulled by hand, the push rod should not move more than one inch.

            Spacing

            If you are equipped with duals, check to see there is proper spacing between the tires and there is nothing stuck.

            Spring Arm

            The spring arm should be secure at both ends.

            Spring Mount

            The spring mount should be secure at both ends.

            Torque Arm

            Make sure the torque arm is secured properly. Also look for cracks, bends and breaks.

            U-Bolts

            Make sure to check and mention that no u-bolts are missing.

            Coupling Area

            Print:

            What to Check For:

            Air Lines

            Air lines should be secure at both ends with no abrasions, bulges or cuts. They should not be leaking, dragging or tangled.

            Apron

            Make sure the apron is properly mounted and secure. Look for cracks, bends and breaks.

            Clearance

            Make sure there is enough space between the tractor mudflap and the trailer landing gear so that they don’t hit each other when making a turn.

            Electric Line

            The electric line should be secure at both ends. There should be no abrasions, bulges, cuts or exposed wires.

            Gap

            The gap is not an actual item, however there should be no space between the apron and the skid plate.

            Glad Hands

            The seals should be in good condition with no cracks, signs of rotting, or leaking air.

            King Pin

            Make sure the king pin is properly mounted and secure. Look for cracks, bends and breaks.

            Locking Jaws

            You must physically check that the locking jaws is fully locked around the king pin.

            Mounting Bolts

            No mounting bolts should be missing.

            Platform

            Make sure the platform is properly mounted and secure. Look for cracks, bends and breaks.

            Release Arm

            The release arm should be in the fully locked position.

            Skid Plate

            The skid plate needs to be properly lubed.

            Sliding Fifth Wheel Locking Pin

            The pin must be in the fully locked position.

            Trailer

            Print:

            What to Check For:

            Airbag

            Again make sure the airbag has no abrasions, bulges, cuts or leakings. The airbag should not be missing any mounting bolts.

            Axle Seal

            The axle seal should not be leaking and should be filled to the manufacturer’s specifications.

            Brake Chamber

            The brake chamber should be properly mounted so that is does not leak air.

            Brake Drum

            The brake drum should be properly mounted and secure.

            Brake Hose

            The brake hose should be secure at both ends with no abrasions, bulges, cuts or leaks.

            Brake Lining

            Check for oil or debris on the brake lining. There should be at least 1/4 of an inch of friction material.

            Frame and Cross Members

            There cannot be any missing cross members.

            Header Board

            The header board cannot have any holes or missing rivets.

            Landing Gear

            The landing gear must be fully raised and the cradle handle secure.

            Lug Nuts

            Rust trails indicate loose bolts. Powder residue and cracks around the bolt holes could be an indication of over-tightened bolts.

            Rim

            The rims cannot have any unauthorized welds.

            Rear Door and Hinges

            The rear door should open, close and latch properly. Door seals should not be worn, torn or dry rotten.

            Shock Absorber

            The shock absorber should be checked at both ends for leaks.

            Slack Adjuster and Push Rod

            When the brakes are released and pulled by hand, the push rod should not move more than one inch.

            Tandem Frame and Release

            Release handle and locking pins should be in the fully locked position.

            Trailer Tire

            There should be no abrasions, bulges or cuts to the tread or sidewalls. Tread depth should be no less than 2/32 of an inch. The tire should be properly filled to manufacturer’s specifications and checked with an air gauge.

            Light Check

            Print:

            • Front of the truck
            • Both sides of the truck
            • Rear of the truck
            • Both sides of the trailer
            • Rear of the trailer

            The five functions are:

            • Left turn signal
            • Right turn signal
            • Four way flashers
            • High/low beams
            • Brake lights

            In-Cab Inspection and Brake Tests

            Print:

            What to Check For:

            The last section is In-Cab Inspection and Brake Tests. For the In-Cab Inspection you will once again want to make sure all of the following components are properly mounted and secure. As well as the following:

            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.
            Air Pressure Gauges

            The air pressure gauges should build to governor cut out.

            Emergency 520彩票官网

            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 Brake
            • Trailer Parking Brakes – Set the trailer brake, release the tractor brake, then tug lightly on the trailer.
            • 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.

            During a CDL pre-trip inspection, truckers inspect many aspects of their commercial vehicle, including the overall safety of the vehicle; major hoses, fluid levels, and vehicle belts; the clutch or gear shift; and emergency equipment. The driver demonstrates their knowledge by walking around the vehicle, checking various safety components and explaining why each part should be checked for safety.

            Pre Trip Inspection Video

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            Printable checklists:

            Try these practice tests:

            page last edit: 12/9/2019

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