Dandlac58
Well Known Member
Hi VAF Friends, Mentors, Experts!
Trouble: Unable to fill brake system to remove air bubble mushy/sponginess on three of four brake pedals.
Situation: emptied brake fluid and flushed entire system from top to bottom with mineral spirits. Cleaned brake housings and pistons and added new O rings on the pistons. Using the rebuild kit from MATCO, I rebuilt all 4 MATCO master cylinders, two on the pilot side L & R brakes and two on the co-pilot side L & R brakes. A "T" running from the remote fluid reservoir feeds both sets of brake lines. Checked to ensure all brake lines were connected properly to the master cylinders and to the brakes at the wheels. Proceeded to fill all lines from the bleed fitting at the bottom of each brake on both wheels. Pumped 5606 until it was flowing without bubbles through an overflow line into a bottle we had set up at the remote reservoir in the engine compartment. No leaks detected at any point in the system. Yet the only brake working properly is the co-pilot right brake, the other three are mushy/spongy. Also, if I hold pressure on the co-pilot right brake pedal, the pilot right brake pedal firms up, but when i let go of pressure on the co-pilot brake then the pilot brake goes mushy/spongy. Are we missing a filling process/procedure for the 4 Master cylinder brake setup on the RV7?
What in the world am I doing wrong, spent 7 hours today on a process that should take 30 minutes and at a stand still as to how to move forward. Any help is greatly appreciated.
Thanks!
Dan
Trouble: Unable to fill brake system to remove air bubble mushy/sponginess on three of four brake pedals.
Situation: emptied brake fluid and flushed entire system from top to bottom with mineral spirits. Cleaned brake housings and pistons and added new O rings on the pistons. Using the rebuild kit from MATCO, I rebuilt all 4 MATCO master cylinders, two on the pilot side L & R brakes and two on the co-pilot side L & R brakes. A "T" running from the remote fluid reservoir feeds both sets of brake lines. Checked to ensure all brake lines were connected properly to the master cylinders and to the brakes at the wheels. Proceeded to fill all lines from the bleed fitting at the bottom of each brake on both wheels. Pumped 5606 until it was flowing without bubbles through an overflow line into a bottle we had set up at the remote reservoir in the engine compartment. No leaks detected at any point in the system. Yet the only brake working properly is the co-pilot right brake, the other three are mushy/spongy. Also, if I hold pressure on the co-pilot right brake pedal, the pilot right brake pedal firms up, but when i let go of pressure on the co-pilot brake then the pilot brake goes mushy/spongy. Are we missing a filling process/procedure for the 4 Master cylinder brake setup on the RV7?
What in the world am I doing wrong, spent 7 hours today on a process that should take 30 minutes and at a stand still as to how to move forward. Any help is greatly appreciated.
Thanks!
Dan