Ford Aerostar (1997 year). Manual — part 63
253
R
WARNING
Driving too fast for conditions creates the
possibility of loss of vehicle control.
Driving at very high speeds for extended
periods of time may result in damage to
vehicle components.
At least once a month, check the pressure in all
your vehicle’s tires, including the spare. Use an
accurate tire pressure gauge. Check the tire
pressure when tires are cold, after the vehicle
has been parked for at least one hour or has
been driven less than 3 miles (5 km). You can
find proper cold pressure and load limits of
recommended size tires on the Safety
Compliance Certification Label.
R
WARNING
Improperly inflated tires can affect vehicle
handling and can fail suddenly, possibly
resulting in loss of vehicle control.
Tire Inspection and Maintenance
Inspect the tire treads, and remove stones, nails,
glass or other objects that may be wedged in the
tread grooves. Check for holes or cuts that may
permit air to leak from the tire, and make the
necessary repairs.
Inspect the tire side walls for cuts, bruises and
other damage. If you suspect internal damage to
the tire, have it demounted and checked. You
may need to repair or replace it.
Wheel inspection and maintenance
Check for damage that would affect the runout
of the wheels. Wobble or shimmy will eventually
damage the wheel bearings.
254
Front wheel bearings require periodic repacking
and adjustment as specified in the
Maintenance
Schedule
booklet. Loose or worn front wheel
bearings tend to let the vehicle wander or
shimmy, and can eventually cause excessive tire
wear.
Whenever a wheel is removed and then
re-installed, always remove any corrosion that
may be present on the mounting surface of the
wheel and/or the surface of the hub, drum or
rotor that contacts the wheel.
R
WARNING
Installing wheels without a good
metal-to-metal contact at the wheel
mounting surface can cause the wheel lug
nuts to loosen and could allow the wheel
to come off while the vehicle is in motion.
R
WARNING
On-vehicle wheel balancing will cause
damage to the drivetrain of E-4WD
Aerostars.
Traction-Lok Rear Axle
(If equipped)
This axle provides added drive away traction on
slippery surfaces, particularly when one or more
wheels are on a surface with poor traction.
R
WARNING
To avoid injury, never run the engine
with one wheel off the ground, such as
when changing a tire.
255
Tire Rotation
Because your vehicle’s front and rear tires
perform different jobs, they often wear
differently. To make sure your tires wear evenly
and last longer, rotate them as indicated in the
following diagram.
For tire rotation intervals, see the
Maintenance
Schedule
booklet. If you notice that the tires wear
unevenly, have them checked.
In situations where the tires differ from front to
rear (snow/traction), simply rotate using a side
to side pattern.
Tire rotation pattern
After each rotation, adjust individual tire
pressure as specified on the Safety Compliance
Certification Label. Tighten wheel lug nuts to the
required torque specification and retighten again
after 500 miles (800 km).
256
If your vehicle has aluminum wheels, you may
demount the full size, non-temporary spare
tire (if so equipped) and remount on an
aluminum wheel to rotate the spare tire into
your vehicle’s rotation pattern. Rebalance the
wheel.
You may discover uneven outside shoulder wear
on your vehicle’s front radial tires if you drive
often in the city and turn frequently around
curbs. You can extend the life of your front tires
by remounting them so the outside of the tire
faces inside on the wheel rim.
Replacing the Tires
Replace any tires that show wear bands. When
your tire shows a wear band, it has only 1/16
inch (2 mm) of tread left.
Wear band
Because your vehicle’s tires may wear unevenly,
you may need to replace them before a wear
band appears across the entire tread.
Your wheels and tires are match-mounted for
improved ride. Before you begin to repair a tire,
mark the wheel and tire so that they are
properly aligned when remounted. This will
ensure that the tires will continue to give you
the same ride level.
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