
Breakaway switch: If equipped, must be connected to the first link of the safety chain. Safety chains: Must be in an “X” pattern. Equalizing arms: If equipped, must be attached and the chains must be tight. Pin/Ball/Coupler: Must be seated properly in the coupler and locked. Sliding fifth-wheel: If equipped, has no loose or missing parts in the mechanism, the locking pins are engaged, and the fifth-wheel is positioned properly so the towing vehicle clears the landing gear. No gap between the trailer and the skid plate. Apron: Where visible, cannot be bent, cracked, or broken. Kingpin: Where visible, cannot be bent. Release arm: Must be in the engaged position and locked in place. Platform supporting the skid plate: Cannot be cracked or broken. Locking jaws: Must be locked around the trailer kingpin. Safety latch: Must be engaged, if equipped. Mounting bolts: Cannot be loose or missing. Oil level, coolant level, and power steering fluids: All must be in the safe operating range. Check brake drums and linings for oil, grease, etc. Brake linings: The linings (where visible) must not be dangerously thin. Lug nuts: All lug nuts must be present, not loose, and have no cracks radiating from lug bolt holes.
Tires: Each tire at every axle must be properly inflated, have evenly worn tread, and have no cuts or other damage.There should be no welding repairs or rust trails to indicate a rim is loose on the wheel. Rims: The rims cannot be damaged or bent.Mirrors: The mirrors must be secure, properly adjusted, and clean.
Windshields: The windshield must be clear and undamaged.Lights: All lights (e.g., high and low beam headlights, turn signals, clearance, identification) must be clean and working.
Visually check for and describe how you would check: The items to look for on your vehicle during your pre-trip inspection are listed below.