'68 C20 Brake Push Rod Adj.

[A 68 Wreck]

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Hello.
I am bringing back to life my parked C20 Pick up.
The brakes went out a couple years ago, and so it has just sat, with me turning it over every other month.
I have replaced the front wheel and main cylinders.
My questions are w/ the 1)brake pedal adj and the 2)push rod to main cylinder adj.
1) I adjusted the pedal pad to floor, from in the cab on the pedal arm, to 3.5". I did this by removing a piece bolted to the pedal, which female threaded onto the push rod coming out of the body wall, and unscrewed it a bit and reset the lock nut. I believe all is good there?
2) The end of the push rod, coming out of the brake booster is also adjustable. When rod is pushed back into booster til it stops, I believe I have it set 1/8" from touching the main cylinder "piston". An 1/8" gap between end of rod and the main "piston". (Dual reservoir) Should it be touching? Partially compressing?

My main problem is when I tried to bleed all wheel cyls, the pedal went to the floor, and built up no pressure, and never became "firmer". A bit of fluid came out all cyls, no air. I saw no leaks.
I believe I am not "plunging" enough...but maybe it sat so long there is air wayyy down the lines?

Thanks in advance!!

[Tom Vogel]

I dont think its a pushrod adjustment problem. I think youve still got air in the lines. Check for leaks everywhere, including your rubber flex hoses. You probably also need to purge all your old fluid out if its been in there for years. Last thing would be a bad master cylinder... if you replace that, bench bleed it first and dont let the fluid drop to the bottom while you are bleeding the brakes, or you will have to start over.

[A 68 Wreck]

Thanks.

IF, and only IF, there is no bench bleed of the master and it is mounted and connected in the truck, can one still fill and bleed as normal, w/ the air in the master eventually bleeding out the wheel cylinders?

I am going to bleed bleed bleed today as I am hoping/thinking there is air and really old fluid, like u mention.

Thanks again.

[A 68 Wreck]

Well,

I "benched" the main in the truck, and then bled bled bled all the stout stuff out until the pale ale ran. Yahoo, brakes!
Going to grease it up, mount tires, and take it for a spin for the first time in a few years!
Have not been on this site in a while obviously, but thanks for the help Tom.

Beers to ya!

[Tom Vogel]

Good deal!