There is another procedure that is used and is injecting low pressure on the brake fluid boat (approx 0.25 to 0.5 bar).
For this, a kit with several caps that are placed instead of the original cap and a pear with a pressure gauge that serves to breathe the air is supplied.
You put the plug compatible with the model, give the pear until the needle goes up and open the potharm. At that time the liquid will begin to flow with some pressure and you will save the \ "pump, step, keep stepped on, release \" of a lifetime.
All the best.