I'm trying to flush the brakes on my 89 Comanche using the factory service manual instructions. I didn't make it very far. I started and stopped on the passenger rear drum brake. Seem to be going as expected until it wasn't. I had someone press the brake, I opened the valve, waited a bit, closed the valve, and signaled to have my helper release the brake pedal. After several cycles, brake fluid didn't seem to be flowing into the hose/bottle I had attached to the bleeder valve. When I went to check on the master brake cylinder, the smaller front reservoir was empty and the larger rear reservoir was full. Is that normal? Is the smaller front reservoir for the drum breaks? And, the larger rear reservoir for the front calipers? I also noticed that the rubber gasket in the master brake cylinder cover looked as if pressure sucked it out of shape.
I'm also wondering if I have to clamp the cover on the master brake cylinder every time I check it during the bleeding process, or can I just put the lid back without the clamp until I get all the brakes bled.
Any advice would be appreciated.