Weighing Procedures; Weight Distribution - Tiffin Motorhomes 2015 Allegro Owner's Manual

Gross Axle-Weight Rating (GAWR) – This is the maximum allowable weight for an axle; the GAWR
considers the weakest link in the tire, wheel, brakes, hubs, axle, springs, and attaching parts. To illus-
trate, if the axle is rated at 15,000 pounds and the tires are rated at 3,200 pounds each as a dual instal-
lation; then the maximum GAWR would be 12,800 pounds for a four-tire vehicle.

WEIGHING PROCEDURES

To weigh the motorhome properly, the motorhome should be level when the weighing process is per-
formed. Your Allegro motor home has been designed and built in compliance with the recommended
limits of the major-component/system suppliers to provide a realistic CCC. It is up to the final user to
provide even distribution of the loads brought into the motor home to prevent uneven loading. Once
the vehicle is loaded, it can be taken to any certified drive-on scales or individual-wheel scales to de-
termine that the final weight is within specified limits for the motorhome. The procedure that can be
used is as follows:
First, drive the motorhome onto the scales so that all wheels are on the scales; this provides the gross
vehicle weight (GVW) of the vehicle and can be recorded as such. The GVW should not exceed the
GVWR specified for the vehicle.
Second, drive the motorhome so that the front wheels are off the scales and only the rear wheels remain
on the scales; this provides the total weight of the vehicle, save for the front axle. This weight should
not exceed the total rating of the axles remaining on the scales. The front axle weight is determined by
subtracting the weight from the GVW that was obtained in the first step which was performed earlier.
The result should not exceed the listed front-axle weight rating.

WEIGHT DISTRIBUTION

To assure the maximum stability of the motorhome under static (i.e., parked) and dynamic (i.e., mov-
ing) conditions, the distribution of the items to be carried and stored within the motorhome and in
the storage bays underneath the motorhome should be performed in such a manner to strive for rea-
sonably even side-to-side and front-to-rear dispersion of the weight of the stored items. This process
will assure that the motorhome is not "lop-sided" in weight distribution (i.e., all the stored weight on
one side and/or mainly towards the front or the rear)—keeping a center of mass of the motorhome
essentially centered on a front-to-rear and side-to-side basis will also provide better control of the mo-
torhome when it is in motion.
GENERAL INFORMATION
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