install push plates

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The 4040SE uses the regular arm for any Push Side mounting (minimum 28" door width). ST-2788 (a special arm and track) can be used to mount a 4040SE on the Push Side of a smaller (narrow) door. Sm...
When installing the arm; the gearbox shaft  and door must be at the (+90°) full open position. The following step are used to install the Sr. Swing (REG) push arm. Install the header and door brac...