Denford Triac Toolchanging Issue

[m_c]

First check would be to see if the draw bar release cylinder is getting air. Just take the pipe off, and see if you get air out it when you activate the drawbar.

[GingerNinja54]

Thanks m_c!
Out of interest, I have two regulators on the back of the cabinet; the upper one is connected and has a trap and lubricator fitted. The lower one is blanked off and doesn’t look to have ever been used?
Any ideas on if it should be?
The toolchanger/drawbar was working before, so the regulators aren’t causing this new issue, but I was wondering what the lower one is for?
Separately, my door has the pneumatic cylinder attached and it’s constantly under air pressure (when machine is connected to air) I assumed this should only be the case when it’s running?
I have to disconnect airline to open door!
Any ideas on this one too?