ORIGINAL POWERMASTER PROBLEM & RESULTS:
The 30 amp fuse blew suddenly and I got a hard pedal with the brake light on continuously. I replaced the fuse and then disconnected the coolant fan delay relay to see if the fuse would still blow(It didn't).
I depressurized the system then, the motor ran 20 seconds but the motor didn't shut off(So I terminated the cycling of the motor to let it cool). Meanwhile, I replaced the accumulator ball with a new(Yellow striped)one! The grey pressure switch is virtually new, with less than 200 miles on it! I also replaced the check valve assembly in the master cylinder. There was no damage to the "O" ring seal on the check valve piston. But, it was somewhat stuck but the brake fluid was clean and the "O" ring ruber was not deteriorated in any way.
After doing the above, I again depressurized the powermaster and cycled the motor and it initially ran for about 13 seconds until the motor shut off. Next, I depressed the brake pedal and the motor cycled for 6 seconds before it shut off. The problem though, was that I could push the brake pedal all the way to the floor during brake cycling? Before the 30 amp fuse had blown, the brakes worked just fine! Now, I can't get a firm pedal at all-UNLESS the key is off and I depress the brake pedal to depressurize the powermaster? My car only has 48,000 miles on it!
If the brake fluid leaks back into the powermaster side reservoir, aside from an internal leak inside the master cylinder itself, could the brake fluid also leak back into the reservoir, back through the motor itself, for any reason? I had replaced the powermaster motor with a new motor from Hank Terry)approximately 200 miles ago! If not-then, where else inside the master cylinder(EXCEPT for the check valve assembly?)could brake fluid leak back into the powermaster side brake reservoir?
I'll appreciate any suggestions as to why my brake pedal can easily be pushed to the floor during brake cycling and what most likely, is the cause for this as well as what can be done to fix this problem? Keep in mind that this is the first time that the brake pedal has ever gone to the floor(Just since the 30 amp fuse blew!)otherwise the brakes had previously, worked perfectly, always! I also waited five minutes after the powermaster motor had initially filled the accumulator ball and had shut off-but, the motor did not cycle at all during this time without touching the brake pedal! There are no leaks at any of the wheel cylinders and none anywhere around the powermaster itself-nor, inside the car ? HELPPPPP!!!
The 30 amp fuse blew suddenly and I got a hard pedal with the brake light on continuously. I replaced the fuse and then disconnected the coolant fan delay relay to see if the fuse would still blow(It didn't).
I depressurized the system then, the motor ran 20 seconds but the motor didn't shut off(So I terminated the cycling of the motor to let it cool). Meanwhile, I replaced the accumulator ball with a new(Yellow striped)one! The grey pressure switch is virtually new, with less than 200 miles on it! I also replaced the check valve assembly in the master cylinder. There was no damage to the "O" ring seal on the check valve piston. But, it was somewhat stuck but the brake fluid was clean and the "O" ring ruber was not deteriorated in any way.
After doing the above, I again depressurized the powermaster and cycled the motor and it initially ran for about 13 seconds until the motor shut off. Next, I depressed the brake pedal and the motor cycled for 6 seconds before it shut off. The problem though, was that I could push the brake pedal all the way to the floor during brake cycling? Before the 30 amp fuse had blown, the brakes worked just fine! Now, I can't get a firm pedal at all-UNLESS the key is off and I depress the brake pedal to depressurize the powermaster? My car only has 48,000 miles on it!
If the brake fluid leaks back into the powermaster side reservoir, aside from an internal leak inside the master cylinder itself, could the brake fluid also leak back into the reservoir, back through the motor itself, for any reason? I had replaced the powermaster motor with a new motor from Hank Terry)approximately 200 miles ago! If not-then, where else inside the master cylinder(EXCEPT for the check valve assembly?)could brake fluid leak back into the powermaster side brake reservoir?
I'll appreciate any suggestions as to why my brake pedal can easily be pushed to the floor during brake cycling and what most likely, is the cause for this as well as what can be done to fix this problem? Keep in mind that this is the first time that the brake pedal has ever gone to the floor(Just since the 30 amp fuse blew!)otherwise the brakes had previously, worked perfectly, always! I also waited five minutes after the powermaster motor had initially filled the accumulator ball and had shut off-but, the motor did not cycle at all during this time without touching the brake pedal! There are no leaks at any of the wheel cylinders and none anywhere around the powermaster itself-nor, inside the car ? HELPPPPP!!!
