Brake bleeding experts need apply :)
Laughing Gas
Joined: Nov 2015
Posts: 951
Likes: 73
From: San Diego
One thing I would like to add...When foot bleeding a master cylinder and the brakes....be careful NOT to bottom out the pedal when bleeding the brakes this way..The master cylinder bore is NOT machined at the far reaches of the bore...you will damage the plunger seals and chase your tail trying to figure out why you cant get a nice firm feel...the master cylinder will be bypassing internally.... I put a vise grip on the pedal shaft of my 1955 to have it stop the travel so the vise grip hits the floor before anything can bottom out...a book about the thickness of the Bible under brake pedals was how I kept my crew from ruining master cylinders when I ran shops...also dont be pushing that pedal fast when bleeding...nice even slow pushes of the pedal this way you wont cause aeration of the brake fluid
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More Turbo
Joined: Jan 2011
Posts: 505
Likes: 34
From: Brandenburg, KY
One thing I would like to add...When foot bleeding a master cylinder and the brakes....be careful NOT to bottom out the pedal when bleeding the brakes this way..The master cylinder bore is NOT machined at the far reaches of the bore...you will damage the plunger seals and chase your tail trying to figure out why you cant get a nice firm feel...the master cylinder will be bypassing internally.... I put a vise grip on the pedal shaft of my 1955 to have it stop the travel so the vise grip hits the floor before anything can bottom out...a book about the thickness of the Bible under brake pedals was how I kept my crew from ruining master cylinders when I ran shops...also dont be pushing that pedal fast when bleeding...nice even slow pushes of the pedal this way you wont cause aeration of the brake fluid
Mountain Pass
Joined: Nov 2017
Posts: 194
Likes: 2
From: Toronto, Canada
Hey Greg. I to have 4 wheel disks on my 51
and I was having the same issue. Checked all my lines. No air. Replaced new residual lines in case they were faulty, And finally changed the reverse light switch. Nothing helped. Unless you put the residual lines a couple inches from your MC you will always get a little oil going back to the MC because it is mounted a a low position. What I did is adjusted my break pedal to just keep the tiniest bit of pressure on the MC, you gotta be very careful to not put a lot or else your breaks wills stay closed. It’s just a 1/4 turn on the adjacent rod that goes into the MC
and I was having the same issue. Checked all my lines. No air. Replaced new residual lines in case they were faulty, And finally changed the reverse light switch. Nothing helped. Unless you put the residual lines a couple inches from your MC you will always get a little oil going back to the MC because it is mounted a a low position. What I did is adjusted my break pedal to just keep the tiniest bit of pressure on the MC, you gotta be very careful to not put a lot or else your breaks wills stay closed. It’s just a 1/4 turn on the adjacent rod that goes into the MC
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