Suspension and Slack Adjuster Inspection
Walk around the vehicle and visually inspect suspension and slack adjuster components.
Inspect slack adjusters for signs of damage. See Fig. 11.1, Fig. 11.2, or Fig. 11.3.
Inspect slack adjuster boots, if equipped, for cuts or tears.
Inspect anchor straps, if equipped, for damage.
Look for worn clevis pins on brake chamber pushrods.
Look for missing or damaged cotter pins on the clevis pins.
Ensure chamber piston rods are in line with the slack adjusters.
Wheel and Tire Inspection
Walk around the vehicle and visually inspect each wheel and tire assembly.
Inspect tire condition for the following:
valve stem caps on every tire, screwed on finger-tight
bulges, cracks, cuts, and penetrations
oil contamination (petroleum derivatives will soften the rubber and destroy the tire)
tread depth—if tread is less than 4/32 inch (3 mm) on any front tire, or less than 2/32 inch (1.5 mm) on any rear tire, replace the tire
debris lodged between duel tire sets
Check tire inflation.
Examine each rim and wheel component.
Inspect the outboard side of all wheel hubs and the hub oil seal area on the inboard side of each wheel for signs of oil leakage. If any oil is found on wheel and tire or brake components, remove the vehicle from service until the leak has been fixed.
If needed, fill the hubs to the level indicated on the hub cap. See Group 35 of the Century Class Trucks Maintenance Manual for recommended lubricants.
Saddle Tank Areas Inspection
Inspect visible components of the exhaust system to ensure connections are tight.
Engine Compartment Inspection
Check the engine oil level.
Check the power steering reservoir fluid level.
Check the engine coolant level in the radiator surge tank. See Fig. 11.7.
Inspect visible engine wiring for damage or looseness. Check for loose wiring, chafed insula- tion, and damaged or loose hold-down clamps.
With the ignition switch in the OFF position, check the air-pressure warning system.
Check air governor cut-in and cut-out pressures.
Check air pressure build-up time.
Check air leakage in the system.
Check the air pressure reserve.
Inspect the mirrors, window glass, and windshield for cracks or other damage.
Ensure that the horn, windshield wipers, and windshield washers are operating properly. These devices must be in good working order for safe vehicle operation.
Ensure the heater and defroster are operating properly.
Check the operation of all interior lights.
Check the operation of all exterior lights. See Fig. 11.8.
Inspect the seat belts and tether belts.
Check the fuel level in the fuel tank(s). To keep condensation to a minimum, fuel tanks should be filled at the end of each day.
Adjust the rearview and down view mirrors as necessary.
Test the service brakes.
Test the backup alarm.
Source: MaintainX (Community Member)