Inflation pressures should be checked when tires are
cool, using an accurate tire pressure gauge. Check
pressures at regular intervals.
Bleeding the air from hot tires is dangerous and
should not be attempted. While the pressure will be
reduced, an increase in temperature of the tire will take
place as soon as driving is resumed and tire failure will
1. Remove the headlight rim retaining screws and
remove the headlight rim.
2. Unhook the headlight retaining spring from the
Too little air pressure increases deflection, causes
the tread to wipe and scuff over the road, results in extra
strain on the tire, and increases the chances for bruising.
3. Remove the sealed-beam unit from the
headlight and disconnect the three-way connector at the
Maintaining the proper air pressure provides
rear. Hold the three-way connector firmly to avoid
maximum road contact and results in increased tire life.
damage to the wiring. Remove the headlight retainer
from the sealed-beam unit.
4. It is good practice to aim headlights for
Overinflation reduces tire deflection and tire contact
area, causing the tire to ride on the crown, and results in
the headlight aiming does not conflict with existing laws
rapid wear in the center of the tread.
TIRE AND WHEEL BALANCE
Front wheel shimmy, wandering, and cupped tires
are caused by an out-of-balance condition of one or both
front tires. If the tires are changed because of a flat tire
or to equalize wear, it is advised that they be checked for
balance before operating the truck.
WHEN INSTALLING REAR WHEELS, BE SURE
HAND HOLE ON INSIDE WHEEL, IS OVER BRAKE
DRUM INSPECTION HOLE.