How to remove output tray (front door) on MX922?

[CanonLaw]

I bought the MX922 because I needed a printer under 18" deep, and the specs on the MX922 say it's 15.6" deep.  But when I print, the output tray (the door on the front) drops down, increasing the depth to something like 22".  In the tight space I have, the tray does not fully deploy, and the paper output jams.

How can I remove the output tray?  I'm hesitant to take a saw to my new printer, but that tray makes the printer useless to me.

Is there a maintenance manual somewhere that describes how to remove the output tray?

[bluebottle]

Is ths a similar procedure for an MX726 ?  I've got the same problem where the front tray won't close because the paper extension arm is jammed and won't fold in.