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Hadley SAMS Owner's Service Manual
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Partial lowering of the vehicle ride height can be chosen by the operator of the vehicle to decrease theclearance between the vehicle and the ground, to a predetermined position, in order to clear an overheadobstruction. This mode may be selected by momentarily depressing the “lower” pushbutton located onthe user interface, with the vehicle speed at 10MPH or less. Once the mode is selected, the system ECUwill lower the entire vehicle to a predetermined position and the LED located above the pushbutton onthe 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 exceeds10MPH or the operator momentarily depresses the “raise” pushbutton located on the user interface. Oncethe 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 decreasethe clearance between the vehicle and the ground to a mechanical minimum distance in order to allowadditional clearance for an overhead obstruction. This mode may be selected by depressing and holdingthe “lower” pushbutton for approximately 3 seconds, with the vehicle speed at 5MPH or less. Thepushbutton must be held until the LED located above the pushbutton remains on continuously. At thatpoint, 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 LEDlocated 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 exceeds5MPH or the operator momentarily depresses the “raise” pushbutton located on the user interface. Oncethe mode has been deactivated, the ECU will automatically turn off the LED.Tag Dump ModeThis mode of operation is used to control the air pressure in the tag axle of the vehicle. This mode allowsthe vehicle operator to reduce the load on the rear axle to decrease the turning radius and improvemaneuverability. This feature can also be used to increase the traction of the drive axle. This mode maybe selected by depressing the “tag dump” pushbutton located in the center of the user interface, with thevehicle speed at 12MPH or less. Once the mode is selected, the system ECU will reduce the tag axlepressure from normal to approximately 5psi and the LED located above the pushbutton on the userinterface 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 thevehicle operator does not momentarily depress the “tag dump” pushbutton. If the “tag dump” pushbuttonis 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 speedincreases above 12MPH, but remains below 20MPH, the mode remains active. With the vehicle speedabove 12MPH and below 20MPH, the ECU will partially increase the tag axle pressure to 30psi. Shouldthe vehicle speed exceed 20MPH, then the ECU will automatically cancel the mode and the tag axlepressure 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. |
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