Stuck service brakes
Posted: Sat Sep 23, 2017 5:26 am
Seeking the hive-mind wisdom on this one.
My brakes: 4 wheel disk with dual chamber m/c. (I highly recommend the mod!) Installed abt. 12 years ago.
Problem: after applying the brakes a few times, the pressure in the system does not drop back down. Brake pedal is rock hard. All 4 brakes are locked up.
When I bleed the brake cylinders (one front, one back), brakes are happy & back to normal ... until I hit the brake pedal a few times, then locked up again.
Recent work: I recently bled the entire brake system - replaced all of the fluid.
My best guess is that there's crud in the master cylinder blocking the intake/return ports on both front & back circuits, but only on the return of the fluid.
My thought is to drain & flush everything (lines, wheel cylinders, m/c), then fill & bleed entire system. (I'm guessing the main problem is in the m/c, but if there's crud there, I'll bet theres crud everywhere.) Any ideas, comments, words of wisdom before I go through a few gallons of brake fluid on this one?
My brakes: 4 wheel disk with dual chamber m/c. (I highly recommend the mod!) Installed abt. 12 years ago.
Problem: after applying the brakes a few times, the pressure in the system does not drop back down. Brake pedal is rock hard. All 4 brakes are locked up.
When I bleed the brake cylinders (one front, one back), brakes are happy & back to normal ... until I hit the brake pedal a few times, then locked up again.
Recent work: I recently bled the entire brake system - replaced all of the fluid.
My best guess is that there's crud in the master cylinder blocking the intake/return ports on both front & back circuits, but only on the return of the fluid.
My thought is to drain & flush everything (lines, wheel cylinders, m/c), then fill & bleed entire system. (I'm guessing the main problem is in the m/c, but if there's crud there, I'll bet theres crud everywhere.) Any ideas, comments, words of wisdom before I go through a few gallons of brake fluid on this one?