Vehicle Overview When you approach the tractor-trailer, take note of the general condition. Look for damage or if the vehicle is leaning to one side. Look under the vehicle for fresh oil, coolant, grease, or fuel leaks. You should check the area around the vehicle for people, objects, low hanging wires, and tree limbs which could present a hazard when the  vehicle  is  moved. Look inside the cab and ensure the parking brakes are engaged. For added safety, a set of wheel chocks should be in place around one of the tires. NOTE: In the NCF, all 2 ton and above vehicles must have a set of wheel chocks that are used when the vehicle is parked. Engine Compartment You may have to raise the hood, tilt the cab (secure loose items so they cannot fall), or open the engine com- partment door. Check  the  following: l l l l l l l l l l Engine  oil  level. Coolant level in radiator; condition of hoses. Power  steering  fluid  level;  hose  condition  (if  so equipped). Windshield washer fluid level. Battery  fluid  level,  connection,  and  tiedown (batteries  may  be  located  in  a  separate  compart- ment). Automatic transmission fluid level (may require a check with the engine warm and running). Check belts for tightness and excessive wear (alternator or generator, water pump, and air compressor). Leaks (fuel, coolant, oil, power steering fluid, hydraulic  fluid,  and  battery  fluid). Cracked or worn electrical wiring insulation. When checks are completed, you should lower and secure the hood, cab, or engine compartment door. Walk  Around  Inspection When you perform the walk around inspection, turn on  the  headlights,  four-way  hazard  warning  flashers, 7-6 parking,  clearance,  side  marker,  and  identification lights. Clean all lights, reflectors, and glass as you go along. Do not forget to check your brake and left and right turn signal lights. If a light bulb is not working, the yard boss normally has spare bulbs and tools that allows you to replace faulty bulbs. LEFT FRONT.— On the left front of the tractor, inspect  the  following: l l l l l s l Check the glass on the driver’s door and ensure it is clean. Check and ensure the door latches or locks work properly. Check the left front wheel for the condition of the wheel and rim, such as missing, bent, broken studs, clamps, lugs, or any signs of misalignment. Check  the  condition  of  the  tire  for  proper inflation, valve stem and cap are in place, serious cuts, bulges, and tread wear. Check the lug nuts for looseness and rust streaks. Check the condition of the spring, spring hanger, shackles,  and  U-bolts  on  the  left  front  suspen- sion. Check the condition of the brake drum(s) and condition of the brake hoses on the left front brake. FRONT.— On the front of the tractor, inspect the following: l l l l l l Condition of the front axle. Condition  of  the  steering  system  for  such  things as loose, worn, bent, damaged, or missing parts. Grab  the  steering  mechanism  and  check  for looseness. Condition of the windshield for damage and dirt. Condition  of  the  windshield  wiper  arms  for proper  spring  tension. Condition of the wiper blades for damage, rubber stiffness,  and  securement. Condition of lights and reflectors, such as the parking,  clearance,  and  identification  lights. Ensure they are clean, operating, and are the proper  color  (amber  at  front).