- Check fuel tanks for loose mounting, leaks or other conditions; loose or missing caps; and signs of leaking fuel below the tanks.
- For exhaust systems, check for unsecured mounting; leaks beneath the cab; exhaust system components in contact with electrical wiring or brake lines and hoses; and excessive carbon deposits around seams and clamps.
4. Frame, Van & Open-Top Trailers
- Inspect for corrosion fatigue, cracks in cross member(s) and the frame, and missing or defective body parts.
- Look at the condition of the hoses, and check the suspension of air hoses of the vehicle with sliding tandems.
- On the frame and frame assembly, check for cracks, bends, sagging, loose fasteners or any defect that may lead to the collapse of the frame; and for corrosion, fatigue, cross members cracked or missing, cracks in frame, missing or defective body parts.
- Inspect all axle(s).
- Inspect for non-manufactured holes (i.e., rust holes, holes created by rubbing or friction, etc.), and for broken springs in the spring brake housing section of the parking brake.
- For vans and open-top trailer bodies, look at the upper rail and check roof bows and side posts for buckling, cracks or ineffective fasteners. On the lower rail, check for breaks accompanied by sagging floor, rail or cross members; or broken with loose or missing fasteners at side post adjacent to the crack.
- Inspect all required lamps for proper color, operation, mounting and visibility.
6. Securement of Cargo
- Make sure the load is safe and secure.
- Check tail board security.
- Verify end gates are secured in stake pockets.
- Check both sides of the trailer to ensure cargo is protected from shifting or falling.
- Verify that rear doors are securely closed.
- Where load is visible, check for proper blocking and bracing. It may be necessary to examine inside of trailer to assure that large objects are properly secured.
- Check cargo securement devices for proper number, size and condition.
- Check tie down anchor points for deformation and cracking.
- Check the steering lash by first turning the steering wheel in one direction until the tires begin to pivot. Then, place a mark on the steering wheel at a fixed reference point and turn the wheel in the opposite direction until the tires again start to move. Mark the steering wheel at the same fixed reference point and measure the distance between the two marks. The amount of allowable lash varies with the diameter of the steering wheel.
- Inspect the suspension for indications of misaligned, shifted, cracked or missing springs; loosened shackles; missing bolts; unsecured spring hangars; and cracked or loose U-bolts.
- Check any unsecured axle positioning parts and for signs of axle misalignment.
- On the front axle, check for cracks, welds and obvious misalignment.
9. Tires, Wheels, Rims & Hubs
- Check tires for proper inflation, cuts and bulges, regrooved tires on steering axle, tread wear and major tread groove depth.
- Inspect sidewalls for defects, improper repairs, exposed fabric or cord, contact with any part of the vehicle and tire markings excluding it from use on a steering axle.
- Inspect wheels and rims for cracks, unseated locking rings and broken or missing lugs, studs or clamps.
- Check for rims that are cracked or bent, have loose of damaged lug nuts and elongated stud holes, have cracks across spokes or in the web area and evidence of slippage in the clamp areas. Check the hubs for lubricant leaks, missing caps or plugs, misalignment and positioning and damaged, worn or missing parts.