Owner-operators and fleet managers searching for a semi truck DOT inspection checklist need more than a vague “check the brakes” reminder. Use this guide to prepare tractor and trailer before you arrive at DOT Semi in Matthews, NC, and pair it with our overview of DOT inspection requirements.
Tractor checklist
Brakes and air system
- Pushrod travel / adjustment within CVSA limits on each chamber
- Air compressor build-up time; governor cut-in and cut-out
- Low-air warning and parking brake function
- No audible leaks at gladhands, valves, or chambers
Tires, wheels, and steering
- Steer tire tread and matching duals on drive axles
- Inflation to load chart; no exposed cords or bulges
- Wheel fasteners present and properly torqued
- Steering free play within limits; no power-steering leaks
Lights, glass, and cab
- Headlamps, turn signals, brake, marker, and clearance lamps
- Windshield free of cracks in critical vision areas
- Wipers and washer operational
- Horn, seat belt, and required cab markings
Frame, fuel, exhaust, and coupling
- Frame rails and crossmembers free of critical cracks
- Fuel tanks secure; no leaks
- Exhaust not leaking into cab; properly mounted
- Fifth wheel jaws, pivot, and mounting hardware
Trailer checklist
- Brake chambers, slack adjusters, and lining thickness
- Lights, reflective tape, and ABS malfunction lamp
- Kingpin and upper coupler wear
- Landing gear, doors, hinges, and load securement points
- Suspension components and tire condition
Required emergency equipment
- Fire extinguisher properly charged and mounted
- Spare fuses (if required for the vehicle)
- Warning devices (triangles) present and accessible
How to use this checklist before your appointment
- Walk the unit with this list the day before your shop visit
- Fix obvious lighting and tire issues first—they are fast fails
- Bring prior inspection reports and recent repair invoices
- Read common failures to avoid out-of-service surprises
- Confirm interval rules in how often inspections are required
Ready to schedule? Call (980) DOT-SEMI or visit our Charlotte Metro inspection center.