I'm trying to get the brakes to work on my 1965 stick 230SL The car sat for two years before I got to working on it.
After replacing the master cylinder and reservoir, and rebuilding one rear cylinder and one front caliper, the brake peddle goes to the floor.
I also replaced the front pads and all four rubber brake lines.
There are no leaks in the system.
I've run at least three quarts of brake fluid through the bleeders. I get flow through all four.
Today, I removed the three lines from the master cylinder (MC), and put bolts (M10-1.50) into the holes. The peddle would go down about a half inch. This indicated to me that the MC had been bench-bled ok (by me).
I drained the rear reservoir and put the rear brake line back on the MC. Added fluid. Brakes are down a bit, but the peddle is close to the top.
Removed the bolt to the right front wheel and put the line on the MC. Added fluid. Brake peddle goes down about 75% of the way to the floor.
Removed the bolt to the left front wheel and put the line on the MC. Added fluid. Brake peddle goes down to the floor. as before.
Bled the front brakes with a power bleeder. Fluid and few bubbles came out. After bubbles stopped, tightened the bleed screw. Did both front wheels.
Still the same result.
I've also bled the four wheels with a pressure bleeder, with tno improvement.
It was my understanding that with a dual-circuit system, the brakes would still work if one circuit was lost.
Any advice is appreciated in helping solve this very frustrating problem.
Joe