64 Avanti brakes

[Shoovel]

Folks,

I need your help. I’m working on a 64 Avanti without the “anti roll” feature. 
I’ve replaced the front caliber blocks, rear wheel cyl, front & rear flex lines and master cyl. I don’t know what I have done wrong, cause I can’t get any pressure when bleeding. I tried having my helper push down on the pedal and hold it to the floor, I got air out of the RR, and LR, then RF and LF, but I cannot get any pedal. I had my helper pump the pedal with the same results. All parts from   Studebaker Intl.

Any help will be greatly appreciated. Thanks.

 

[Mel]

Being you changed the master cylinder, I'd probably start with assuring the clearance between the end of the booster rod and the seat of the master cylinder piston is within spec's.  If you're uncertain, a tool is available which is used for this.  Good luck.

[mfg]

I agree with Mel…. the booster rod is probably adjusted short.

[John Brissette]

Did you bench bleed the MC?

If not, I'd suggest you start there, and then adjust the push rod when you reinstall the MC.

[Shoovel]

3 hours ago, John Brissette said:

Did you bench bleed the MC?

If not, I'd suggest you start there, and then adjust the push rod when you reinstall the MC.

In the master cyl box it stated not to bench bleed. So I didn’t.

[Dwight FitzSimons]

1 hour ago, Shoovel said:

In the master cyl box it stated not to bench bleed. So I didn’t.

I've never heard of not bench bleeding a M.C., and, although I'm not an expert, I've done my own brakes for 50 years.

--Dwight

[Kodjo]

The rod should be 23mm if I remember well:

[Avanti1963!]

How do you bench bleed the master cylinder?   Wouldn't the fluid leak out the bottom?  I've rebuilt a bunch of these and never did that.  

[mfg]

3 hours ago, Avanti1963! said:

How do you bench bleed the master cylinder?   Wouldn't the fluid leak out the bottom?  I've rebuilt a bunch of these and never did that.  

You make up two (if tandem) steel tubes that screw onto master cylinder outlets… you place open end of tubes into master cylinder (full of fluid… tubes submerged) and pump cylinder until you see no more air bubbles.

[John Brissette]

What mfg said  X 2

[Guy]

It seems that bleeding of the brakes is a regular problem and multiple people have posted about not having proper pedal height. No one yet has suggested using a pressure bleeder, when I worked as a mechanic thats how we did all the cars, never bench bleeded ever, never had an issue ever. It is not to difficult to make one. Good luck Guy

[Hogtrough]

Not sure why you would have to bench bleed at this point. Simply keep adding fluid and bleeding each wheel until all the air is out. Make sure your helper understands the pedal must stay down until after you tighten the bleeder. Look at the stream of fluid as it exits. If you see any interruption or hear air, there's your problem