Tire Pressure:
A motorhome may weigh slightly heavier on one side. Tire inflation pressure of the heavier side
tires determine the inflation pressure for all tire(s) on that axle due to the weight transfer that occurs
when cornering.
Improperly inflated tires, or an incorrectly loaded suspension, can result in poor fuel economy, poor
handling and over-stressed chassis components. How the motorhome is loaded will influence tire
inflation pressure and the load carried by each axle. This is why each wheel position must be
weighed. Motorhome axle configuration and floor plan styles will require different weighing proce-
dures.
NOTE:
When weighing a motorhome, each tire on any axle must be inflated to the same pres-
sure. The wheel position carrying the most weight will determine the tire inflation
pressure for each tire of that particular axle.
Tag Axle Motorhome (Roadmaster Chassis):
Motorhomes equipped with a tag axle will require adjustment to the air pressure regulator for
the tag axle to maintain proper axle weight distribution ratios. The adjustable regulator and gauge
package are located in the engine compartment on the driver side. The regulator is designed to con-
trol the amount of air pressure in the tag axle air bags. Increasing the regulator pressure gauge reading
will increase the amount of air pressure in the tag axle air bags, and downward force of the tag
axle. Applying downward force to the tag axle decreases the weight carried by the drive axle.
Tag Axle Regulator Adjustment:
The pressure regulator adjustment knob has a positive lock. Pull up on the knob to unlock; push
down on the knob to lock. Turn the knob clockwise to increase air pressure; turn the knob counter-
clockwise to decrease air pressure. Decreasing regulator air pressure will release excess air through
the regulator discharge port. Air pressure stabilization procedures will be performed each time an
increase or decrease of air pressure to the regulator is made, equalizing the regulator to hold a constant
air pressure setting.
Section 2 --- Driving & Safety
The Executive 2005
90
090256
Tag Axle Regulator: Located in the Roadside
Rear Engine Compartment.
Pull knob up to
unlock.
Push down
knob to lock.
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