Weak Braking; suggestions? (1 Viewer)

[FJHokie]

I'm reviving a 1971 FJ40 but it has weak braking even after replaced the 8 cylinders, bleeding all the lines, and adjusted the brakes.

What is the next step? Master Cylinder rebuild?

How can i tell if my problem is the master cylinder?

Cheers

 

[bikersmurf]

how does the pedal feel? Does it sink to the floor when you stand on it?

Vacume booster?

 

[Adrift]

Have you replaced the soft lines? It's possible there is a soft spot allowing for a bubble to form, which would make the brakes soft as you wouldn't have enough pressure making it to the cylinders.

 

[FJHokie]

bikersmurf, the brakes feel pretty firm and don't hit the floor. They got progressively firmer as we bled each line.

how can I isolate the problem to the vacuum booster vs. master cylinder?

 

[micky]

what i did is swap over to the taco master and booster. that fixed my problem wich was simalar to the one you discribe.

 

[FJHokie]

I'm trying to limit costs... should I replace the booster or master cylinder? or both?