I recently was bleading my brakes when I ended up quiting because they're was no fluid coming up to the front right wheel cylinder on my 72. So I took the line off. Still no fluid. So I went on to the front left and it shot fluid out across the room. Can anyone tell me why their is no fluid to the wheel cylinder or how to fix this? All the lines and hoses are brand new. I tried manual bleeding and gravity bleeding.

Thanks

It's a pretty simple system, Trev. I would start at the wheel, (which you obviously already have), then go backwards toward the master. I'll bet you find your proportioning valve has a blockage in it.

Thank you!

I bet it is the distribution block. I just wanted some ideas before I end up taking it apart.

Thanks

Try disconecting the line at the master and before the brake hose and give it a shot of compressed air!If it blows the blockage free your set! graemlins/thumbsup.gif

Thank you!! I'll try that first.

The 72 has a combo valve on it. Under the rubber cap there is a pin. Pop the rubber cap off and clamp the pin down with a c-clamp, then try bleeding the fronts.

It could also be a simple as a swelled brake hose. I had tyhe same problem and the brake hose was swelled shut.

Thank you for the reply's!!

Unfortunately, I didn't get time to inpect this today like I would have liked. It was a fast and busy day. Church till 12:00 pm, then lunch/rest till 2:00-2:30, then I started working on regapping my plugs, then had planned on timing the car and setting float levels but I ruined my inductive pickup on my timing light by melting it on the exhaust headers, and I had to fix a rear tire on my Minneapolis Moline 670. Hopefully i'll have some time on tuesday afternoon to fix this. For the time being I will do some studying in the Haynes manual and the Assembly manual.

John,
Which rubber cap are you talking about? I suspect you're talking about a/the cap on the block. What is the purpose of this pin?

Bob,
That could be the problem also. The hose isn't brand new any more. Would that do that because of the bend in the line? Any fix to it?

Thanks

There's a rubber cap on the end of the combo valve which is mounted on the inside frame near where the engine and transmission meet. The Haynes book has a fairly good explantion of the valve. Believe it also mentions pushing the pin in when bleeding the fronts.

Alright. Thanks John!! I'll hopefully tackle it tomorrow.

Sorry to jump in on your post, but I was having some leakage from that distribution block on my 72 and was wondering if a replacment one is available anywhere? Anyone know how to remove the lines from there after they've corroded? thanks graemlins/waving.gif

Their should be a replacement block. I wouldn't know what to recommend to you about the lines. Are just the lines corroded or the fittings too?

there appears to be a lot of corrosion where the fitting goes into the distribution block. I am afraid that the head of the bolt is going to snap off before I can break it loose. Thanks again!
FJ

Just looked at my brakes. It doesn't have a combo valve on it, just a distribution block.

I finally got fluid to the cylinder. But I can't get fluid through the cylinder through the bleeder. We even pulled the cylinder apart and put it back together(new parts) and that didn't worked. Could their be something bad in the casting of the cylinder?

Did you flare your own ends of the new lines? Maybe the line is crushed or mis-aligned with the wheel cylinder. Check out that hose too, they can pinch off under pressure and cause a wheel to lock. The hole from the line into the cylinder is straight so that would be easy to check with a drill bit. My 2 cents.

Sounds like your bleeder screw is full of funk. Have you tried a new bleeder screw? Swap left and right front bleeder screws and see what happens, or try removing the right one and see if anything comes out when you step on the brakes. If it does, you may have found the problem. Sometimes the little passages get corroded and don't work. You can also remove the bleeder screw and clean the hole in it with a piece of wire or something.

Hi,

Lines were pre-bent when bought, hoses are clear and open, bleeder screws are new and open. It seems as if their is pressure on the pedal no matter what if you have the bleeder screw open, closed, or off. Their isn't much play in the brake pedal and it doesn't go down far since it's new. (Grandpa actually suggested to get some old shoes to put on so drums will go on easier and pedal will have more travel. :confused: ) But when you disconnect the line from the bleeder screw, while having the pedal pushed down before disconnecting the line, the pedal will fall when the line is disconnected but not when the bleeder screw is open or disconnected. Dad also broke linings off of a shoe. Got pissed off since the drum wasn't going on and tried hammering the drum on with a 3lb hammer. :mad: Must have been impatient for a change! :rolleyes: Would it help to lubricate the inside of the cylinders some more?

That's weird. Maybe the passage from inside the wheel cylinder to the hole that the bleeder screw goes into is clogged or not drilled all the way.

If you're getting brake fluid to come out from the wheel cylinder end of the right rubber hose, and not getting any brake fluid to come out of the bleeder screw hole with no bleeder screw in it, I'd guess there's blockage in the wheel cylinder.

Yeah, that's what we're kind of thinking too. We forgot to blow air through that passage when we had the cylinder apart. That will be the next thing that we'll try.

Thanks