
ExTERIOR
D - 12
D
D - 13
possible tire failure. Excessive loads or under inflation can lead to an excessive
amount of heat and tire failure. If you discover that your tires cannot handle the
load, lighten the weight of the load on your tires.
Tire pressure should never be reduced below the vehicle manufacturer’s
recommended levels to support load conditions in order to improve the ride
quality of a vehicle. The difference in ride quality is not significant. When inflation
pressure requirements are not met, tire durability and optimum operation can
be affected.
Lug Nut Torquing
Use a torque wrench to tighten lug nuts. Tightening by hand or with an
impact wrench is not recommended. See torque pattern shown for tightening
sequence. Follow torque specifications in specification chart in the specifica-
tion section of this manual.
Proper wheel nut torque is very important to safe and dependable towing of
your vehicle. The wheel and axle systems used in travel trailers are similar,
yet different, in many ways to those used on cars and trucks. These differ-
ences are important and require special attention to wheel nut torque both
while the trailer is new and throughout the trailer’s life.
Trailer wheels must carry much higher loads per wheel than passenger car or
truck wheels. Each wheel may carry 1000 pounds and higher. Furthermore,
wheels on tandem axle trailers do not steer, and are subjected to very high
side load stress whenever the trailer makes a tight turn. When you go around
corners, especially slow, tight ones, the wheels on your trailer are subject to
these strong side loads. This tends to flex the wheel and gradually loosen the
wheel nuts. Although the materials and manufacturing methods are maxi-
mized for this kind of service, these extra loads can cause stress, which can
result in flexing and loosening of wheel nuts.
Before each trip and any time a wheel is replaced, be sure to tighten the
wheel nuts, following the sequence shown in the relevant lug pattern below.
Set the torque specification in three stages as seen in the chart. If the wheel
was replaced, check the torque at 10, 25, and 50 miles.
If you notice wheel wobbling or hear a rattling sound coming from a wheel,
especially at low speeds, a wheel lug nut may have come loose. This prob-
lem is usually caused by improper tightening or by faulty or damaged lug
1
2
3
4
5
6
5
4
3
2
1
WHEEL TORQUE PATTERN
Содержание 2013 International
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