right this is my field first of all undo the rear bleed nipples and fill the master to the brim this is called gravety bleed you may need to tap the flexy hoses to help the fluid through this should stop getting an air lock in the system once your at this stage its just a case of bleeding as normal starting with the ferthest away from the master cylinder and doing one corner at a time this job would be alot easier with a preasure bleeder though. there is nothing to prime hope this helps john