Helpful Tech Information

Active Seat Info

ASU Standby Mode
In the standby mode, the ASU monitors its inputs and the seat performs as a standard air seat.
The Active Seat™ is in standby mode when the vehicle is started but not moving or when certain seat codes are stored (if a seat code is stored, the seat will default to standby mode). The seat will act as an air seat until the code is cleared or until the vehicle is turned OFF and restarted. The seat will then be active when vehicle is moving or until a code is stored.
The ASU will not engage the flow control valve (D) or pressure control valve (C) while in standby mode. These valves are spring loaded to a position that allows oil to flow through them in either direction. Oil is allowed to circulate through a loop consisting of the actuator (E), connecting hoses (H and I), flow control valve (D) and pressure control valve (C) bypass orifice (J) and internal passages in the valve body. In standby mode, the piston in the actuator is able to extend and retract. Excess oil from the loop is returned to the hydraulic oil reservoir through the oil return check valve (G).
The seat will remain in standby mode until the vehicle starts to move or the switch is depressed into the raise or lower position. If the seat is above or below the ride zone when the raise/lower switch is depressed the ASU will automatically adjust the seat height back into the ride zone.
ASU Active Mode — Seat Not Moving
When the seat is in active mode (vehicle moving) and the vehicle is on smooth ground, the seat will not be moving. The high pressure oil goes through a 3000 kPa (30 bar; 435 psi) inlet pressure reducing valve (B) at the hitch frame. Regulated oil is then routed by hose to the seat control valve assembly. The oil enters the valve assembly through an inlet screen (A) at the pressure control valve (C). The pressure control valve is a solenoid operated, pilot oil actuated valve. When the seat is in the active mode, the ASU powers a solenoid to open the pressure control valve and route oil to the flow control valve. The flow control valve is held in the zero position with no oil flowing to the actuator (E), the seat is held stationary.
ASU Active Mode — Seat Up
When the vehicle moves down while the ASU is in the active mode (vehicle moving), it will detect the motion from the accelerometer and monitor seat position sensor. The ASU will then energize the pressure control valve solenoid (C) and route controlled oil pressure to the flow control valve (D). The flow control valve (D) is energized to route oil to the cap end of the actuator (E) and extend the piston, (pushing the seat up), counteracting the vehicle motion and keep the operator stationary.
Return oil from the rod end of the actuator is routed through a hose to flow control valve, check valve and to the hydraulic oil reservoir through a hose. An accumulator (F) is located between the pressure control valve (C) and the flow control valve (D). The accumulator helps speed initial flow of oil to actuator when the flow control valve opens to give a smoother operating seat
ASU Active Mode — Seat Down
When the vehicle moves up in the active mode (vehicle moving), the ASU reduced pressure supply oil is routed through the pressure control valve (C) to the flow control valve (D). The flow control valve routes oil through the actuator lowering hose to the rod end of the actuator and retracts the actuator, moving the seat down, counteracting the upward movement of the vehicle.