I have had my 753 for a couple of weeks.
I have no user manual. I have a copy of 750 Series Loader Service manual.
Cannot find the things i am looking for.

How does the locking mechanism of the loader work?
Engine on - Seat bar in position
Traction does not work, Loader does not work.
If lifting pedal is pressed hydraulics are loaded but forks will not move.

If I press the traction override switch i can drive.

Is there a seat switch and a seat bar switch?
Is there any indication on the control panel?
Is there a separate valve for locking traction and loader?