Projects 58 Chevy Pickup build · Can O' Worms!

I got it bench bled, so I am good there now.

I haven't found an extension, but I think I have narrowed it down to a clogged line on the back driver side, or a stuck wheel cylinder there. The other 3 wheels are getting plenty of juice. I am going to pull that line and blow it out with air then check the cylinder.

Here is the start to the stripes.

 

are you running each of the front brakes off the same location on the proportioning valve? I know some of them split off of 1 and others will run 1 port per side. I assume you're getting fluid to both of the rear and one of the fronts

Nice stripes BTW.

 

Hopefully it is that easy, I had hell with mine even after the extension fixing leaks. Anyway, looks great, love the pic of the wife with the ear to ear smile!

 

OK... So I am positive I am doing something wrong here with the brakes.

I did get a vacuum bleeder, and I think that helped a ton on the back side. That said, I can't get a wrench on the bleeder with the vacuum bleeder on because of how far it is recessed into the backing plate. So I pump up the Vacuum bleeder, and get the fluid flowing, then pull it off and tighten the bleeder as fast as possible. Now at at least I know I have fluid flowing at the rear.

So Here is what happens:
We pump up the brakes, bleed them off at all 4 corners. The peddle feels better. Then I start chasing leaks and fixing them. Next, do it all over again. Finally the pedal feels good. We put it in neutral and press the brakes. Low and behold, it won't move!!! Next we crank the motor, and the good feeling peddle we had is now gone. It's almost not existent. Where the truck sits in the garage I don't have the guts to put it gear with the peddle feeling like that. Finally we turn the motor off, and the peddle gets stiffer but it is noticeably lighter.

This is my first time dealing with power assisted brakes, and I am sure I am doing some wrong here. So please school me.

 

No matter how fast you think you can pull that line and tighten the bleeder up... You still no fast enough to keep the air out!


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Right, but bleeding it with Jen the traditional way fixes that. So that's not really the issue anymore. Just more of a explanation of where things were / are now.

 

Oh gotcha!


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I have the same problem. I will be watching to find your solution. I found that they still had air in the lines no matter how hard I tried to get them bled. I just left the top off the MC and let the air find its way back to the top, it seemed to help a little bit. Could it be the size of the vacuum canister behind the MC? Is your MC originally for drum/drum application? or are you running something different? They make inline residual pressure valves.. I wonder if this would help

 

you guys have done an incredible job...what's the steering column from?

 

67-72 Chevy pickup... It makes it so much easier, we used an American Autowire kit which came with new plugs rouse the stock signal wiring. Plus... You can either use a grant adapter for a 3 spoke wheel or use earlier model steering wheels and they'll bolt right up without adapter!!!

Thanks for the compliments, it was hard work!! We enjoyed it though!!


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I am SOOOOO proud of you, Chad, for finishing a project! or at least getting close.

way to stay focused!

 

It ain't that hard when someone else is buying all the parts!!

 

Can you take a picture of your proportioning valve for us? I'd like to see how you have your lines running in and out. It sounds like its providing more pressure to the front brakes than the rear causing a line lock of sorts

 

Here's what I got from when it was here....

 

Have you tried a pressure bleeder?Some times those types of setups work better than the vacuum types.Just a thought.
Good luck.Have fun.Be safe.
Leo

 

I had something similar with a scout I built. It turned out to be a bad master cylinder that was sucking air past the seal where the pushrod goes in. I put another master on it and that solved it.

 

And showing up every weekend saying let's go, We gotta make some progress.

 

you probably bought the truck off the same dickbeater my buddy bought his merc from

 

We Have Brakes!

Dirty2 came over tonight and we got it sorted out.
Really came down to a lot of leaks that would show up in different spots each time we started to get good pressure. Then a lot of air in the lines from those leaks. Finally we did have to make a quick adjustment to the peddle rod going into the booster. We were able to gain an inch there and that finished it off. We were able to get it cranked and put it in gear with the brake peddle down (with good pressure) and it held!

I am really glad that worked, as one of the theories being tossed around was the peddle pivot ratio was off (ours was 6/1 and it should be 4/1). I am thrilled I didn't to have to pull that out and reconfigure it.

Wish there was a magic bullet, but it just turned out to be a lot of little things.

 

So you drove it around the block right????

 

pictures or it didn't happen

 

No... We had to clear a bunch of stuff out from around it and we were running short on time. Maybe this weekend.

LOL! I am working on it. hope to have them posted this weekend.

This is for those that that didn't know about pedal ratio, like myself.

 

Y'all done good! Nice lookin' truck.

 

The ratio I never checked, because we were using a power pedal and power assisted brakes. But I don't understand how that would affect it when essentially you could've move the foot pad up the arm and it would have changed the ratio but it wouldn't have changed anything externally?

 

From what I understand it changes the fulcrum point, and that helps in getting the correct pedal pressure during the travel of the pedal up and down. After Dirty2 went over with a couple of others guys, we are going to have to move it. I will post pictures when we start addressing this.

 

Thank ya, It has come a long way.

 

Well I couldn't stand it any longer. I drove it!
Brakes need the pedal ratio adjusted for sure, but over all not bad for the first slow trip of this old truck moving under it's own power in 30 plus years! There is nothing like that first drive. That is why we do this. I can't wait for the wife to have that feeling. (Once I am positive it is safe).

I just took it around the block. I have some wheel rubbing issues to sort out on the front. Need to get it to a muffler shop and have the pipes re-routed. The old pipes from the donor truck don't fit quite right and drag a bit on steep hills.

So... How about a 16 second video proving it stops before I roll into the garage.
<iframe width="640" height="480" src="http://www.youtube.com/embed/H7WmApmjtXc" frameborder="0" allowfullscreen></iframe>

 

What? No smokey burnout??? dang... I'll be over to show you how to do it and you can run the camera!!!

 

OH, that is coming... Just have to make sure it won't go through the neighbors house first!

 

thanks for posting that information on the brake pedal. I will have to check mine to see where it is sitting at as far as ratio. Cool video!