burning material, such as a cigarette. Always com-
ply with the washer fluid manufacturer’s recom-
mended safety precautions.
4.
Check the front hub lubricant level if equipped with
oil-lubricated wheel bearings.
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.
IMPORTANT: Before removing the fill plug, always
clean the hub cap and plug.
5.
Tilt the cab. Examine the steering gear compo-
nents.
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.
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.
6.
Check the coolant level in the surge tank, check the
condition of the radiator fins and the charge air
cooler (as equipped).
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.
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.
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.
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.
NOTE: When traveling through areas of high in-
sect concentrations, it may be necessary to clean
Pretrip Inspection and Daily Maintenance
9.5
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