Landoll 318C, Руководство оператора

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4-25
4-11 TIRE MAIN TE NANCE
4-11.1
Tire In fla tion . Tire in fla tion will cause
tire to ground con tact char ac ter is tics as
shown in
Fig ure 4-13 . Tire in fla tion should
be checked daily while the tire is cold, and
dur
ing road stops. Check ing the tire pres -
sures while tires are hot will give a faulty in -
creased pres
sure read ing. Ad just ing tire air
pres sure to the speci fied amount while tires
are hot will pro duce im proper tire to road
con tact and thus ab nor mal wear. Do not ex -
ceed cold in
fla tion pres sure listed on the
semi trailer VIN plate lo cated on the front of
the trailer. Ex ceed ing cold in fla tion pres sure
will re sult in dam aged tire bod ies, rims, and
wheels. Re
place all valve stem caps when
pres sure check ing/ad just ing has been com -
pleted. Re move any for eign ob jects from be -
tween du als.
4-11.2
Tire Match ing . Both tires on the same
spin dle must be the same size in or der to
prop erly dis trib ute the load and brak ing forces
be tween them. The tire must be mounted on a
rim and prop
erly in flated be fore meas ur ing. If
there is an al low able dif fer ence in size the
smaller tire should be mounted to the in side
po si tion of the du als.
a. Tape Meas ur ing Method : Meas ure around
each tire on the tread sur face. A maxi mum
dif fer ence of 3/4" is al lowed be tween the two
mat ing tires of a dual
(See Fig ure 4-14).
b. Straight Edge or String Method : (This
method can not be used if tire and wheel as -
sem blies are not mounted on the axle.) Jack
trailer up un
til the wheels are off of the
ground. Hold a straight edge against the tires
of both ends of an axle. A gap at one tire in di -
cates a smaller tire. A maxi mum of 1/8" gap is
al lowed
(See Fig ure 4-15) .
FIG URE 4-13 TIRE IN FLA TION EX AM PLES
FIG URE 4-14 MEAS UR ING TAPE METHOD
FIG URE 4-15 STRAIGHT EDGE METHOD