I had problems bleeding my drum brakes after replacing all the hoses, lines and wheel cylinders. Bleeding the cylinders while someone pumped the brakes didn't work. After several attempts I still had no brake pedal.
I had a pump garden sprayer laying around that I was going to pitch because the spray nozzle went bad.
After a "Hey I think I can use this." moment, I thoroughly cleaned out the sprayer. I cut the spray nozzle off leaving about two feet of hose. After putting about a pint of brake fluid in the container I disconnected the lines from the master cylinder and attached the hose to one brake line fitting at a time with a small hose clamp. If the hose doesn't fit, you might have to use a reducer on the larger fitting.
After pressurizing the sprayer with just a few pumps,( I believe it was only about 3 pumps) I was able to quickly bleed all the air out of the system one line at a time and reattach them to the master cylinder.
DO NOT REMOVE THE SPRAYER HOSE FROM THE LINE WITHOUT RELEASING THE PRESSURE IN THE TANK BY SLOWLY UNSCREWING THE PUMP FROM THE TANK.
I placed a rag around the opening while I did this.
I would be careful not to over pressurize the sprayer and also wear safety glasses. Keep the sprayer upright while doing this so it pulls fluid and not air
It worked for me.
Brian