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Distributed Load is when a load is distributed evenly over the length of the trailer deck. This
would be considered as the ideal load scenario when fully loaded to rated capacity.
Concentrated Load is one that is localized over a shorter than normal distance and imposes
greater stress in the concentrated load areas. Under these conditions, it is not recommended to carry
the full rated capacity of the trailer. Extreme concentrated applications may require additional support
for the load.
1.4
Vehicle Load and Handling Limits
Vehicle handling limits can be greatly affected by the weight of a load, its placement, the
amount of weight distributed over the axles and whether or not the load is secured properly.
Tow vehicle and trailer combinations are designed to provide maximum directional control and
roll stability within the constraints of highway size and weight limits. Any combination can be rolled
over by driving too fast around a curve, making too abrupt a maneuver, or by leaving the roadway.
Locking up the wheels on an axle can result in a jackknife or trailer swing out.
One of the major contributing factors to vehicle rollover is high center of gravity on tall loads.
Extreme caution should be used in maneuvering a vehicle and trailer combination, or any unit that
has a tall load. Positioning the load in a central side to side location will
enhance directional control, roll stability and braking.
You should be aware that trailers with a shorter wheelbase are more prone to roll during an
abrupt lane change or quick reactions at the wheel. This tendency can be made dramatically worse
with a tall, high center of gravity load.
Overloading a vehicle should never be permitted. Overloading results in tire blowouts, spring
breakage, frame damage, diminished braking capacity, and will severely alter the vehicle’s normal
handling characteristics. All vehicles are designed with a maximum load capability. To best utilize
these vehicles in the safest manner the loads as shown on the certificate label should not be
exceeded.
Adequate tongue weight is required for trailers to tow correctly. Inadequate tongue weight can
ca
use a “whipping action” particularly in shorter wheelbase trailers. Too much tongue weight can
overload tow vehicle hitch resulting in reduced steering load and loss of steering control. Selecting
the correct tow vehicle is crucial for the application.
Always maintain enough braking and stopping distance. Erratic or unequal brake action from
side to side on either tow vehicle or trailer can cause handling problems in braking situations. A
balance between tow vehicle and trailer on brake application and release timing and synchronized
pressure will reduce push/pull characteristics which when excessive, may result in jackknife. The use
of properly matched brake lining is recommended to enhance safer braking.
Summary of Contents for TRD-54-T
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Page 26: ...25 www valortrailers com PHONE 208 810 4900 Brake Drum Troubleshooting Chart ...
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Page 32: ...31 www valortrailers com PHONE 208 810 4900 Tire Wear Diagnostic Chart ...
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Page 51: ...50 www valortrailers com PHONE 208 810 4900 Section 3 2 Running Gear SA 23345 ...
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