The annual DOT (Department of Transportation) inspection for a Class 8 semi-truck, also known as a heavy-duty truck, is crucial for ensuring the safety and compliance of the vehicle. The inspection is typically performed by a qualified inspector or a certified commercial motor vehicle mechanic.
Brake System:
• Air system components
• Brake linings and drums
• Brake hoses and tubing
• Slack adjusters
• Brake chambers
• Anti-lock Brake System (ABS) components
Steering Mechanism:
• Steering gear box
• Pitman arm
• Drag link
• Steering column
• Steering wheel
• Power steering fluid levels and leaks
Lights and Reflectors:
• Headlights
• Brake lights
• Turn signals
• Clearance lights
• Reflectors
• Hazard lights
• Emergency flashers
Tires:
• Tire condition and tread depth
• Tire pressure
• Wheel and rim condition
• Dual tires spacing
Fuel System:
• Fuel leaks
• Fuel tank integrity
• Fuel lines and connections
Exhaust System:
• Exhaust pipe
• Muffler
• Exhaust manifold
• Diesel particulate filter (if applicable)
Suspension System:
• Leaf springs
• Air suspension components
• Shock absorbers
Frame and Chassis:
• Frame rails
• Cross members
• Coupling devices (for trailers)
Coupling Devices:
• Fifth wheel
• Kingpin
• Glad hands (for air brake connections)
Electrical System:
• Battery and connections
• Wiring integrity
• Alternator
• Starter motor
Emergency Equipment:
• Fire extinguisher
• Warning triangles
• Spare fuses
• First aid kit
Windshield Wipers:
• Wiper blades condition
• Washer fluid levels
Horn:
• Horn operation
Mirrors:
• Side mirrors
• Rearview mirrors
Fluid Levels:
• Engine oil
• Transmission fluid
• Coolant
• Power steering fluid
Miscellaneous Items:
• Vehicle registration
• Cab and sleeper condition
• Documented record of recent repairs and maintenance
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It’s important to note that this is a general checklist, and specific requirements may vary by jurisdiction. Always refer to the regulations set forth by the relevant DOT or transportation authority in your area.
Experienced and Certified Technicians