Ford Electric Ranger 2001 Manual page 124

204-04-3
DESCRIPTION AND OPERATION (Continued)
Tire, Temporary Spare
CAUTION: Do not attempt to mount a
high-pressure spare tire on a regular wheel. The
high-pressure spare tire is only to be mounted on
a high-pressure wheel. Limited service skin spare
tires are used with standard stamped steel
wheels.
NOTE: Extended use of other than matching size
spare tires on a Traction-Lok® rear axle could
result in a permanent reduction in effectiveness.
This loss of effectiveness may be noticeable to the
driver as backlash and noise increase with worn
clutch plates.
The temporary spare tire is designed to provide a
lightweight, easy to use spare tire. It is for
emergency use only and has a maximum speed
capability of 80 km/h (50 mph).
DIAGNOSIS AND TESTING
Wheels and Tires
Inspection and Verification
WARNING: A vehicle equipped with a
Traction-Lok® differential will always have both
wheels driving. If, while the vehicle is being
serviced, only one wheel is raised off the floor
and the rear axle is driven by the engine, the
wheel on the floor could drive the vehicle off the
stand or jack. Be sure both rear wheels are off
the floor.
WARNING: Never run the engine with one
wheel off the ground, for example, when
changing a tire. The wheel(s) resting on the
ground could cause the vehicle to move.
WARNING: Do not balance the wheels and
tires while they are mounted on the vehicle.
Possible tire disintegration or differential failure
could result, causing personal injury and
extensive component damage. Use off-vehicle
wheel and tire balancer only.
Be sure to follow the warnings when performing
inspection and verification.
Road Test
Verify the customer concern by performing a road
test on a smooth road. If any vibrations are
apparent, go to Section 100-04.
Wheels and Tires
Tire and Wheel Runout
Excessive radial and lateral runout of a wheel and
tire assembly can cause roughness, vibration, wheel
tramp, tire wear and steering wheel tremor.
Before checking runout, and to avoid false readings
caused by temporary flat spots in the tires, check
runout only after the vehicle has been driven far
enough to warm the tires. For additional
information, refer to
To maximize tire performance, inspect for signs of
incorrect inflation and uneven wear, which may
indicate a need for balancing, rotation, or front
suspension alignment.
Correct tire pressure and driving techniques have an
important influence on tire life. Heavy cornering,
excessively rapid acceleration and unnecessary sharp
braking increases tire wear.
Replacement tires must follow the recommended:
• tire sizes.
• speed rating.
• load range.
• radial construction type.
Use of any other tire size or type can seriously
affect:
• ride.
• handling.
• speedometer/odometer calibration.
• vehicle ground clearance.
• tire clearance between the body and chassis.
• wheel bearing life.
• brake cooling.
204-04-3
Section 100-04.
2001 Ranger EV, 01/2001