Owner`s manual

2008 KNIGHT
33
DRIVING & SAFETY — 2
Understanding the Ination Table:
The tire size is on the left margin of the table.
Determine the Single or Dual ination reading,
denoted with a D or S on the Table. Single is for
the front axle. Dual is for the drive axle. On the
following chart, nd the corresponding psi at the
top columns to see the corresponding maximum
weight capacity for that psi.
Rated load capacities are listed for individual
tires in a Dual or Single position.
NOTE
Every load range has a maximum rating
as well as a minimum rating. DO NOT
exceed those ratings.
WARNING
DO NOT exceed tire manufacturer’s
maximum speed rating.
Inspecting & Pressure
Weigh all tire positions separately and use
the tire charts to determine correct tire ination
pressure. All pressures are rated at a cold psi.
Cold psi is dened as early in the morning
before the day’s ambient temperature, sun’s
radiant heat or the heat generated while driving
have caused the tire pressure to temporarily
increase. Check tire ination pressure every
morning before driving. Use a quality truck tire
gauge with an angle airhead to ensure access to
the dual wheel positions of the drive axle.
Ensure the valve cap is replaced on the stem
after the ination pressure is checked. Use valve
stem caps with a positive seal to prevent air
escaping from the valve stem.
If there are extension hoses on the valve stem,
make sure they are good quality reinforced
stainless steel braid. Attach hoses securely to the
outer wheel.
The valve stem cap guarantees the valve core
will remain free of dirt and foreign material.
Material lodged between the valve core and
internal stem can cause slow leaks resulting in
tire failure.
Optimum tire performance is achieved at
proper ination pressure for the load carried.
DO NOT mix tires of different tread patterns,
size or construction on the same axle. The
difference in traction could cause rear end gear
bind and mechanical damage to the drive train.
CAUTION
Never let air out of a hot tire.
Over-ination can cause:
Hard ride.
Tire bruising or carcass damage.
Rapid tread wear in the center of
the tire.
Under-ination can cause:
Tire squeal on turns.
Separations.
Rapid and uneven wear on the
edges of the tread.
Circumferential breaks.
Tire container may bruise or
rupture.
Higher risk of road hazard.
Tire cord breakage.
Loss of casing durability.
Excessive tire temperature.
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High fuel consumption.
Reduced handling quality.
WARNING
A slow leak may go unnoticed on one of
the dual tires. This can cause the good
tire to fail by exceeding the load limit.
Tires with damaged sidewalls can burst
upon inflation. A flat or nearly flat tire
can also generate enough heat from
friction to ignite.
Unequal tire pressures on same axle can
cause:
Uneven braking
Swerve upon acceleration
Steering lead
Torque steer
Reduced handling quality
WARNING
For safety purposes, clear the area of
people and pets during tire inflation.
Inflate tires using a remote inflation
device.
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