Pre Trip Inspection Checklist
- 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 ½ to ¾ of an inch.
- Belt Driven Water Pump - The free play on the belt should be between ½ to ¾ 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 ¼ 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.
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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