Pretrip Inspection and Daily Maintenance burning material, such as a cigarette. Always com- ply with the washer fluid manufacturer’s recom- mended safety precautions. 6. Check the coolant level in the surge tank, check the condition of the radiator fins and the charge air cooler (as equipped). 4. Check the front hub lubricant level if equipped with oil-lubricated wheel bearings. If the coolant is low, check the amount of antifreeze protection. If the protection is adequate, add a 50/50 mixture of water and antifreeze. If additional protection is needed, add antifreeze only. Fill to the line on the surge tank.
Observe the level of the wheel bearing lubricant in the hub cap at each end of the front axle and, if needed, fill the hubs to the level indicated on the hub cap. See Group 33 of the Cargo Maintenance Manual for recommended lubricants. Good airflow through the radiator core and air-to-air aftercooler core is essential for proper engine cool- ing. The cores allow air passage, but form a particle barrier which tends to collect insects and airborne debris. IMPORTANT: Before removing the fill plug, always clean the hub cap and plug. 5. Tilt the cab. Examine the steering gear compo- nents. Inspect for clogged fins.
Use compressed air or wa- ter directed from the fan side of the core to back- flush any material restricting airflow. Examine the steering gear mounting bolts, pitman arm nut, and the drag link nuts for tightness. Be sure the steering driveline and the U-joints are in roadworthy condition, without cracks, breaks, loose- ness, or other damage. Tighten loose nuts and re- place damaged parts as needed. See Group 46 of the Cargo Workshop Manual for instructions. On vehicles equipped with a charge air cooler, also inspect and clean this component. If clogged, the airflow through the radiator could be restricted.
Bent or damaged fins should also be straightened to permit airflow across all areas of the cores. Repair or replace the radiator if it is leaking. See Group 20 of the Cargo Workshop Manual for in- structions. CAUTION Coolant must be filled to the full line of the surge tank. Low coolant could result in engine overheat- ing, which could cause engine damage. NOTE: When traveling through areas of high in- sect concentrations, it may be necessary to clean 9.5