The whole pedal unit is held in place by 1 screw and 2 tabs. Opening the tool lid will reveal the screw. Looking at the back just below each of the two pedals will reveal the tabs.
(1) Open the tool lid;
(2) Using a phillips screwdriver undo the single screw holding the foot pedal unit;
(3) Raise the same edge of the foot pedal unit a small amount. Then using a flat edge screwdriver, or other tool, release the foot pedal by pressing in the two tabs that are now the sole means of securing the foot pedal to the main body.
Neil S
May 2014