It is recommended that new tires be installed in pairs on the same
axle. If necessary to replace only one tire, it should be paired with
the tire having the most tread, to equalize braking traction.
The metric term for tire inflation pressure is the kilopascal (kPa).
Tire pressures is usually printed in both kPa and psi on the tire plac-
ard.
Metric tire gauges are available from tool suppliers.
The chart, shown table, converts commonly used inflation pressur-
es from kPa to psi.
WARNING:
Do not mix different types of tires on the same vehicle
such as radial, bias and bias-belted tires except in emer-
gencies, because handling may be seriously affected
and may result in loss of control.
kPa
kgf/cm
2
psi
160
180
200
220
240
260
280
300
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
23
26
29
32
35
38
41
44
REPLACEMENT WHEELS
Wheels must be replaced if they are bent, dented, have excessive
lateral or radial runout, leak air through welds, have elongated bolt
holes, if lug nuts won’t stay tight, or if they are heavily rusted.
Wheels with greater runout than shown in figure may cause objec-
tional vibrations.
Replacement wheels must be equivalent to the original equipment
wheels in load capacity, diameter, rim width, offset and mounting
configuration. A wheel of improper size or type may affect wheel
and bearing life, brake cooling, speedometer/odometer calibra-
tion, vehicle ground clearance and tire clearance to body and chas-
sis.
HOW TO MEASURE WHEEL RUNOUT
To measure the wheel runout, it is necessary to use an accurate
dial indicator. The tire may be on or off the wheel. The wheel should
be installed to the wheel balancer of the like for proper measure-
ment.
Take measurements of both lateral runout (1) and radial runout (2)
at both inside and outside of the rim flange. With the dial indicator
set in place securely, turn the wheel one full revolution slowly and
record every reading of the indicator.
When the measured runout exceeds the specification and correc-
tion by the balancer adjustment is impossible, replace the wheel.
If the reading is affected by welding, paint or scratch, it should be
ignored.
* TOTAL INDICATOR READING
IGNORE INDICATOR “JUMP”
DUE TO WELD SEAMS, PAINT
RUNS, SCRATCHES, ETC.
Radial
runout limit
Lateral
runout limit
1.14 mm
(0.045 in.)
1.40 mm
(0.055 in.)
Steel wheel
3F-2
WHEELS AND TIRES
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Страница 644: ...Prepared by Overseas Service Department 1st Ed October 1999 Printing 646 ...