Inspection Scope
This procedure ensures tires, wheels, axles, and undercarriage components are free from defects and meet safety and regulatory standards under FMCSA and DOT guidelines. Regular inspections reduce failure risks and extend component lifespan.
Tire Inspection Checklist
- Check tread depth using a gauge – minimum 4/32” steer, 2/32” other wheels
- Inspect for cuts, cracks, bulges, and embedded objects
- Verify inflation pressure against manufacturer specification
- Ensure valve stems and caps are intact and undamaged
- Check dual tires for adequate spacing and foreign object entrapment
- Examine sidewalls for weathering, separation, or blistering
Wheel & Rim Inspection
- Inspect rims for cracks, dents, rust, or distortion
- Check for missing, loose, or damaged lug nuts
- Look for hub oil leaks or signs of overheating
- Verify wheel studs are not stretched or broken
- Confirm proper torque and re-torque intervals
Undercarriage & Suspension
- Inspect leaf springs, hangers, shackles, and airbags for wear or damage
- Check shocks and bushings for oil leaks or deterioration
- Verify cross members and frame rails are free from cracks, rust, or weld failure
- Look for loose or damaged brake lines and air hoses
- Examine driveline components for alignment and secure mounting
Defect Handling Protocol
- Document any defects with location and severity level
- Tag out vehicle if defect is safety-critical (e.g., bulging tire, loose lug nut)
- Schedule repair or part replacement immediately
- Verify completion before next operational cycle
Documentation & Compliance
- Record inspection findings in DVIR or electronic system
- Store tire replacement and rotation history
- Maintain logs for DOT audits and internal QA
- Ensure technician signature and date for each completed inspection