Dorma Comp 9DRKIT Dorma 5000/9000 Series Dev Dogging Repair Kit
You’ll need to remove the 6 screws on the underside of the bar to slide out the touchbar, then you can remove the 4 screws that hold the touchbar to the rear arm bracket.
Once you’ve done this, you can pop the pin that holds the bracket onto the rear arm, and change out the 9DRKIT. The 9DRKIT is the complete rear arm and dogging assembly. Photos attached.
Best Regards, Rich