229
2008 IMPERIAL
CHASSIS INFORMATION — 10
TAG AXLE
Tag Axle Switch
Air Leveling and Opt. Air/Hydraulic Leveling:
Raising or lowering the tag axle is integrated
into the air leveling pad located on the driver’s
console. Pushing the “Tag Lift” button will
illuminate the corresponding LED and raise the
tag axle. The tag lift feature uses a two minute
delay at each ignition cycle to ensure enough
air system pressure is available to raise or lower
the tag axle. After starting the engine, press
the Travel button to begin the time delay. After
approximately two minutes, the tag axle LED
will stop
fl
ashing, indicating the time delay is
over and the tag axle can be raised. The tag axle
will automatically lower when speed approaches
10 mph.
Hydraulic Leveling Only (Optional):
A stand alone switch is used to
raise or lower the tag axle. The tag
axle switch is located on the driver’s
console. Two lights are located on
the switch: the tag axle icon will
illuminate with the park lights and
the lower bar light will illuminate
when the tag axle switch is on and
the transmission is in neutral, reverse or
fi
rst
gear. When the transmission is in second
through sixth gear, the tag axle is automatically
lowered and the light is off. A beeping alarm
sounds when the switch is on. Raise the tag
axle when performing tight maneuvers less
than 5 mph to reduce turn radius and prevent
the tag axle tires from scuf
fi
ng. Raise the tag
axle when performing tight maneuvers at less
than 5 mph to reduce turn radius and prevent
the tag axle tires from scuf
fi
ng. The tag axle
will automatically lower when the motorhome
exceeds 10 mph.
NOTE:
A specific height is not required with the
tag axle in the up position, however, the
tire should be off the ground.
Adjusting Tag Axle Load
Changing the amount
of weight carried by
the tag axle affects
weight distribution
between the tag, drive
and steering axles.
The amount of down
force applied to the
tag axle is controlled
by the amount of air
pressure in the tag
axle air bags.
An adjustable pressure regulator located in
the engine compartment sets the amount of air
pressure in the tag axle air bags.
Regulator pressure is preset at the factory and
may require adjustment to obtain the proper
weight distribution on all axles. To determine
the correct setting of the pressure regulator,
weigh the motorhome after it has been loaded
for travel.
NOTE:
The tag axle pressure regulator valve is
located in the engine compartment on
the roadside.
Tag Axle Lubrication
All tag axles use oil
to lubricate the wheel
bearings. The oil is
drained and re
fi
lled
without removing the
wheel end assembly.
Remove the hubcap
to access the bearing
cover and drain plug.
INSPECTION:
Inspect the oil level
before every trip or
every 5,000 miles.
The motorhome
should remain
motionless for at
least 30 minutes in
order to stabilize
the oil level before
inspecting.
090312c
090312b
Shading
Indicates Correct
Amount of Oil
Tag Axle Pressure Regulator
090256
080504j
020307c
Tag Axle
Switch
Raising the tag axle reduces road clearance
090507
