THOR MOTOR COACH
GENERAL INFORMATION
15
Your motor home must remain as level as possible on the scale, even though an axle or side is not
physically on the scale. To obtain the side-to-side weights, there must be enough space on either side of the
scale to allow the motor home to be partially off the scale.
Individual wheel position weights must not exceed the maximum tire load capacity.
Maximum tire load capacity can only be achieved by utilizing the maximum allowable
pressure (psi) as listed on the sidewall of the tire.
Note: The above information is provided by the Tire Industry Safety Council Rubber Manufacturer's
Association. Used with permission. ( http://www.rma.org/tire_safety/ )
2. For improved accuracy, Thor Motor Coach recommends using a segmented 4-pad scale,
when possible, to determine individual wheel weights. The corner weights should not
exceed half of the respective Gross Axle Weight Rating (GAWR) or the maximum load
rating for the tire or set of dual tires at the rear, whichever is less. The maximum load
rating for the tire can be found embossed on the tire's sidewall. If any of the corner
weights exceed half of the listed GAWR or tire ratings, relocate the passengers and
redistribute or remove a portion of the cargo until the weight is within the proper limits for
all four corners of the vehicle.
Note: Additional cargo carrying capacity can be obtained by reducing the amount of fresh
water carried while driving.
Check vehicle weight periodically to obtain optimum mileage from tires and improve handling. Tires should
always be inflated as recommended in the chassis manufacturer's instructions or on the tire sidewall. See your
chassis operator's manual.
Improper weight distribution or too much weight on your motor homes suspension system can cause spring,
shock absorber, or brake failure, handling or steering problems, irregular tire wear, tire failure or other
damage.
An overloaded motor home is hard to drive and hard to stop. In cases of serious overloading, brakes can fail
completely, particularly on steep hills. The load a tire will carry safely is a combination of the size of tire, its load
range, and corresponding inflation pressure.
Weight Terms
The following is an explanation of commonly used weight abbreviations.
• Gross Vehicle Weight Rating (GVWR) is the maximum permissible weight of this motor
home.
• Unloaded Vehicle Weight (UVW) is the weight of this motor home as manufactured at the
factory with full fuel, engine oil, and coolants.
• Occupant and Cargo Carrying Capacity (OCCC) is equal to the GVWR minus UVW and LP.
In other words, OCCC is how much weight in occupants, cargo , water and trailer tongue
weight that can be added to the motor home without exceeding the GVWR.
• Gross Combined Weight Rating (GCWR) means the maximum allowable loaded weight of
this recreation vehicle with its towed trailer or towed vehicle.
• Gross Axle Weight Rating (GAWR) is the value specified as the load carrying capacity of a
single axle system, as measured at the tire-ground interfaces.
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