About 10 years ago I bought one of those lifetime warranty powermasters. I am now having problems. I read one of online troubleshooting guides and I still not sure. here are my symtoms.... After pressing the brake peddle 10 times and turning the ignition on the pump will run for about 20 seconds. I took the brake cover off I am little confused. There are two chambers for the brake fluid, the one that has two lines for min and max and the other where the pump sucks fluid out. When the pump is done running the chamber where fluid is sucked out is empty. When the brake pedal is pressed 10 times the chamber where it sucks the fluid out is only 1/3 full????The chamber where the add fluid lines is does not go up or down????? fluid is dark colored so it needs to be replace but do I fill the other chamber so it does not run out of fluid? Why is there a chamber that is not used? I know, alot of ?'s Easiest way of draining all of the brake fluid ?