Replaced power accumulator and read bulletins/sticky and can't fix

[Detomaso71]

I have had 5 TRs, 2 of them are GNX
I have one Hydroboost and love it but this car MUST stay original
I have not ever had a brake issues and I though I was a pretty decent mechanic until this last brake issue


My care was up over winter 3 months or so and when I pulled it out to drive it almost took out garage wall
the idle alone was enough to overpower my foot pedal and the pearl was very hard

I followed the bulletin and vendors advice and did the testing and replaced power ball accumulator, after replacing the fluid levels don't change at all and the pump runs continuous and I bleed the two from calipers

My problem is trying to do these two steps as I think I have air in pump or system?

1. Push "lever down" on the proportioning valve ( I don't see anything to push down)
its the old Iron one, yes if keep car would replace with brass but I want to figure out issue and fix before thawing tons of parts at it. there is a wire and cap on top of the valve but I can't push it down

2. "Bench Bleeding", not too familiar with this, could there be air in the pump? I was told so and bench bleed would fix
The big reason I don't think air in pump is the rear or power master (Passenger side) reservoir shoots brake fluid up when running but the level doesn't drop
So while pump is on which would run forever (It doesn't shut off) steady stream of fluid maybe 1 inch above rest of fluid like a fountain, no air bubbles


other issue is fuse if good but brake lights don't turn on by pedal, will check pedal assembly but is this related?




I have the light colored valve switch, new accumulator and original proportion valve
and I have changed all the brake fluid in car except rear drums DOT 3

Thx for any help!
I need to fix asap

 

[bison]

There is an internal leak. Kirbans may have the rings to fix the leak


Sent from my iPhone using Tapatalk

 

[Detomaso71]

Thanks
No way it's just switch or proportion valve?

Internal leak means remove whole master from car? And rebuild?
Once I do that do I have to do all the ?bench bleed etc
Man I wish I have a shop around here that could work on these lol

Wife keeps saying take to Buick dealer and I'm like are you crazy

I really need to fix it and sell the car
I did the bumper fillers and had professionally painted and then was scheduling a detail when brakes went
And in preparation to have it perfect when I sell it this summer

It's a beautiful original GNX otherwise I would do hydroboost
I'm selling off all the cars I don't drive and getting a boat