Holiday Neptune 2004, Owner'S Manual

Page: 82 / 416

82 • SECTION 2 --- DRIVING & SAFETY NEPTUNE 2004
The Federal Certification Label is a guide in knowing the maximum loaded
axle weight rating GAWR , and subsequently the correct tire inflation pressure for
that weight. Every recreational vehicle, even of the same make and model, will
vary in actual loaded axle weights because of different options and personal loads.
While the actual loaded axle weight should be below the GAWR , the motorhome
must be weighed in a loaded condition to know its actual weight. Weigh the front
axle, the total unit, rear axle and the tag axle. It is possible for a motorhome to be
within the
GVWR yet overloaded on a single axle. It is even possible for one
wheel position to be overloaded, even though the GAWR has not been exceeded.
For this reason it will be necessary to weigh each wheel position of the motorhome to
give a clear indication of exactly how the weight of the motorhome is distributed.
Instructions and diagrams are presented on the following pages. When the total
weight and the weight on each axle is known, the tire load data chart in this manual
will show the correct cold inflation pressure per tire for each axle.
There are two important factors to consider when loading the motorhome: total
weight and balance . When loading heavy objects keep them as low as possible,
preferably on the floor or below in storage compartments. Load weight must be
distributed as evenly as possible.
The following is an explanation of commonly used weight abbreviations.
• Gross Vehicle Weight Rating (GVWR): Maximum permissible
weight of this motorhome. GVWR is equal to or greater than the sum
of UVW plus CCC .
• Unloaded Vehicle Weight (UVW): Weight of this motorhome as built
at factory with full fuel, engine oil and coolants. UVW does not
include cargo, fresh water, LP-Gas, occupants or dealer installed
accessories.
• Cargo Carrying Capacity (CCC): Equal to GVWR minus each of
the following: UVW , full fresh potable water weight (including water
heater), full LP-Gas weight, and SCWR . Tongue weight of towed
vehicle and dealer installed equipment will reduce CCC .
• Gross Combination Weight Rating (GCWR): The maximum allowable
loaded weight of this motorhome and any towed trailer or towed vehicle.
• Gross Axle Weight Rating (GAWR): Load-carrying capacity specified
by manufacturer of a single axle system, as measured at tire ground
interfaces.
• Sleeping Capacity Weight Rating (SCWR): The manufacturer's
designated number of sleeping positions multiplied by 154 pounds.
Tire Pressure:
A motorhome may weigh slightly heavier on one side than on the other. Tire
inflation pressure of the heavier side tires determine inflation pressure for all tires
on that axle due to the weight transfer that occurs when cornering. The weight
load will be transferred on the opposite side from the direction in which the
motorhome is cornering.