Driving & Safety
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2•50
with a Tag Axle will require a six position weigh. This type of weighing pro-
cedure will accurately determine what the correct tire inflation pressure should
be. Depending on the type of scale being used, several different scale readings
may be required.
NOTE: The most accurate method to determine proper tire
pressure is a four corner weigh. A slide-out motorhome will
require each tire to be weighed independently. Weighing an axle
will net the total weight carried by that axle. When calculating
the drive axle dual tire pressure using a independent corner
weigh method, divide the total weight by two to determine the
weight carried by each tire. When weighing the entire drive axle,
divide the total weight by four to determine the approximate
weight carried by each tire.
Example:
The motorhome must be weighed fully loaded to obtain accurate scale
readings and to determine the proper tire pressure.
• Take the rear axle Gross Axle Weight Rating (GAWR)
and divide it by two. Record the figure next to scale B
GAWR ÷ 2. Example: If rear axle GAWR is 13,000
lbs. GAWR ÷ 2 would be 6,500 lbs.
• Weigh the driver’s side rear corner (scale B) and record
the scale reading next to Gross Axle Weight (GAW)
for scale B. Example: Scale B reading is 5100 lbs.
• Repeat procedure for the rest of the scale readings.
• Add the GAWR from scales B and D and enter the sum
next to the final GAWR. Example 13,000.
• Add the GAW from scales B and D and enter this sum
next to the final GCAW. Example: 10,000.
• Compare scale readings GCAW against GAWR read-
ings. All figures on line 2 are not to exceed figures on
line 1.
• Use tire chart with scale reading to determine correct
tire pressure.
NOTE: Scale readings and Gross Axle Weight Ratings are ficti-
tious. Actual scale readings and Gross Axle Weight Ratings will
vary with model and options.
WINDSOR
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