Have you tried gravity bleeding? Fill the reservoir with brake fluid. Then loosen both bleeder screws and let it drain while keeping the reservoir full at all times. Let it drain until you have a steady stream of brake fluid draining out each side. It may take a few minutes before fluid starts draing out the bleeding screws. Make sure you don't let the reservoir get even close to being low or it will get air back into it. When you get a steady stream, tighten the bleeder screws back up and see if you have a full pedal or lever. If not you may have to finish bleeding them by pumping the lever.new kid on block here !!!!!!! i gots me a lil problm. master cylinder on a 1990 300 fourtrax 4x4. front wheel cylinders not getting fluid. rebuilt master cyl. but cant getsystem to bleed out. what am i doing wrong ? any help will b rewarded !!!!!1
Pretty much the same as a vehicle, but usually a little harder to get all the air out. Are you saying that you tried gravity bleeding and no fluid would drain out? How long did you wait? It usually takes a while for the fluid to start coming through the bleeder screws. If you can blow air through them, there shouldn't be any reason why they won't gravity bleed. Anyway, you could try this method. It would have to work, I believe, because it would draw the fluid through the lines with the vacuum pump.have bled brakes on lots o vehicles . but nvr a 4x4. figrd it b same as veh.