Pretrip Inspection and Daily Maintenance 17. Inspect the fuel tank(s) and fuel line connections. If so equipped, be sure the fuel tank shutoff valves are open. 27. Check the seat belts for secure mounting and for damage. 18. Check the fuel level in the fuel tank(s), and be sure the fuel cap vent area is clean. If so equipped, check the fuel/water separator for leaks. If needed, prime the fuel tank system. 28. Check the cab interior for loose items and secure or remove them. 29. Turn on the ignition and start the engine. Be sure the air- and oil-pressure warning systems, if equipped, are operating. Leave the engine running. 19.
If so equipped, check the transmission oil cooler for debris and for leaks. 30. Make sure the electric horn and air horn, windshield wipers and washer, heater and defroster are oper- ating properly. 20. If so equipped, inspect the fifth wheel and check it for adequate lubrication. 21. If so equipped, inspect the 7-way trailer cable re- ceptacle(s) for good connections. 31. Check the operation of the backup alarm if so equipped. 32. Turn on the lights. Check the operation of all gauge lights and interior lights. Leave the lights on. 22. Inspect the front and rear suspension components including the springs, shocks, and suspension brackets. 33.
Make sure all of the lights are working, including the brake lights, high- and low-beam headlights, turn signals, clearance lights, and four-way flashers. Check the condition of the reflectors. Turn the lights off. 23. Clean the headlights, rearview mirrors, and the out- side of the windshield and all window glass. Check the condition of the windshield wiper arms and blades. 24. Clean the inside of the windshield, the gauges on the dash, and all window glass. 34. Check the outer surfaces of the cab for visible sur- face breaks and damage. 25. Check for excessive play at the steering wheel. 35. Inspect the air brake components including the brake chamber pushrods, air reservoirs, and air lines.
26. Adjust the driver’s seat, then align the rearview mir- rors. 36. Make sure the brakes are adjusted on all axles. 9.2