Partial lowering
of the vehicle ride height can be chosen by the operator of the vehicle to decrease the
clearance between the vehicle and the ground, to a predetermined position, in order to clear an overhead
obstruction. This mode may be selected by momentarily depressing the “lower” pushbutton located on
the user interface, with the vehicle speed at 10MPH or less. Once the mode is selected, the system ECU
will lower the entire vehicle to a
predetermined position
and the LED located above the pushbutton on
the user interface will blink as a visual indication the mode has been activated.
The ECU will automatically return the entire vehicle to the normal ride height when the speed exceeds
10MPH or the operator momentarily depresses the “raise” pushbutton located on the user interface. Once
the mode has been deactivated, the ECU will automatically turn off the LED.
Entire lowering
of the vehicle ride height can be chosen by the operator of the vehicle to further decrease
the clearance between the vehicle and the ground to a mechanical minimum distance in order to allow
additional clearance for an overhead obstruction. This mode may be selected by depressing and holding
the “lower” pushbutton for approximately 3 seconds, with the vehicle speed at 5MPH or less. The
pushbutton must be held until the LED located above the pushbutton remains on continuously. At that
point, the pushbutton can be released and the mode will remain active. Once the mode becomes active,
the system ECU will lower the entire vehicle to the
lowest possible mechanical position
and the LED
located above the pushbutton on the user interface will remain on as a visual indication the mode is active.
The ECU will automatically return the entire vehicle to the normal ride height when the speed exceeds
5MPH or the operator momentarily depresses the “raise” pushbutton located on the user interface. Once
the mode has been deactivated, the ECU will automatically turn off the LED.
Tag Dump Mode
This mode of operation is used to control the air pressure in the tag axle of the vehicle. This mode allows
the vehicle operator to reduce the load on the rear axle to decrease the turning radius and improve
maneuverability. This feature can also be used to increase the traction of the drive axle. This mode may
be selected by depressing the “tag dump” pushbutton located in the center of the user interface, with the
vehicle speed at 12MPH or less. Once the mode is selected, the system ECU will reduce the tag axle
pressure from normal to approximately 5psi and the LED located above the pushbutton on the user
interface will remain on as a visual indication the mode is active.
The system will remain in this mode as long as the vehicle speed remains at or below 12MPH or the
vehicle operator does not momentarily depress the “tag dump” pushbutton. If the “tag dump” pushbutton
is depressed the system ECU will deactivate the mode and return the tag axle to the normal pressure.
However, if the “tag dump” pushbutton is not depressed, with the mode active, and the vehicle speed
increases above 12MPH, but remains below 20MPH, the mode remains active. With the vehicle speed
above 12MPH and below 20MPH, the ECU will partially increase the tag axle pressure to 30psi. Should
the vehicle speed exceed 20MPH, then the ECU will automatically cancel the mode and the tag axle
pressure will be returned to normal. Once the mode becomes deactivated, by depressing the “tag dump”
pushbutton or exceeding 20MPH, the ECU will automatically turn off the LED.
