Driving & Safety --- Section 2
The Executive 2005
91
To perform the stabilization procedure:
• Start the motorhome and allow the air system to reach a full charge, indicated by the
release of air from the air dryer.
• Raise the tag axle using the tag axle switch on the shift panel. Allow approximately 20 sec-
onds for the system to discharge air from the tag axle air bags.
• Lower the tag axle. The regulator will hold the new air pressure setting.
• Push down on the regulator adjustment knob to lock the setting.
When increasing the air pressure setting allow approximately a two-pound pressure increase before
the stabilization process. Example: If the desired setting is 30 psi, slowly rotate the regulator adjust-
ment knob clockwise to 28 psi. Perform the stabilization procedure. Regulator setting will stabilize to
approximately 30 psi. When decreasing the air pressure setting rotate the regulator adjustment knob
counterclockwise, allowing the excess air to be discharged, and then perform the stabilization pro-
cedure.
Scales:
Certified public scales are located in moving and storage lots, farm supplies with grain elevators,
gravel pits, recycling companies and large commercial truck stops. To locate a nearby public scale
access, check the local area telephone book yellow pages under Scales-Public or Weighers. A nominal
fee may be charged, but this is money wisely spent.
Weight scale types and weighing methods determine the procedure used to calculate proper tire
inflation pressure and axle loading. Several types of scales are in use today. A platform scale will allow
the entire motorhome to fit on the scale to read the GVW in one scale recording. A segmented platform
scale is designed to weight one axle at a time. A single axle scale weighs one axle at a time. Some
scales read only one wheel position at a time due to physical size. Several scale readings may be
required to determine the GAW or GVW total. Each wheel position requires weighing, referred to as a
six-point weigh, to accurately determine the correct tire inflation pressure.
NOTE:
The most accurate method to determine proper tire pressure is six-point weighing.
Each wheel position must be weighed independently. Weighing the entire axle will not
accurately determine the total weight carried by that wheel position. 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. Each wheel position
must be weighed and recorded.
When weighing, the scales and the motorhome must be level to obtain an accurate scale reading.
Even when an axle is not physically on the scale, a definite lean in the motorhome will produce inaccu-
rate scale readings.
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