Removing Control Valve For Air Cushion

Release and pull off the pressure line (red) -1- under the seat.

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Pressure line under seat
Pull the pressure line (red) through betwee n the backrest frame and seat.
Release control valve pressure line (green) -3- from the air cushion pressure line (green) -2- and pull it off. Do not loosen tie-wraps -1- .

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Pressure line for air cushion
Unscrew two fastening screws from the backrest air cushion.
- WM, 721719 - REMOVING AND INSTALLING AIR CUSHION FOR BACKREST
Release locking mechanisms -2- on the control valve -1- (-A-) and remove control valve -B- .

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Control valve
Release pressure line (blue) -3- from the control valve and pull it off.

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Pressure line and connector
Release electric plug connection -4- (-a-) and disconnect it -A- .