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Old 04-20-2017, 03:27 PM   #1
sixty4bigwindow
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CPP front disc brake swap, brakes sticking and smoking a bit

Ok so i finished doing the CPP front disk brake upgrade, bled the lines, fixed all the leaky spots. Went on a drive, and about 10 minutes in, it felt like my rig was slowing down and needed more gas pedal. Funny smell, knew it was the brakes when I pulled over and saw some smoke... i am running a combination valve and dual chamber MC from a 72 c10, mated to a power booster from a 77 c20 (i believe the model is correct, not quite sure,) and the stock pedal rod, with a modified bracket. After I let it sit for about am hour, the pedal went back to normal (it was super tight with no play during the issue.) I'm wondering if i need to get a shorter brake rod or just remove the booster completely? Figured Id come here first to see what you guys think!

Thank you in advance guys!!
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Old 04-20-2017, 04:45 PM   #2
forestb
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

I would try shortening the brake rod first. I had that same problem once.
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Old 04-20-2017, 05:15 PM   #3
Ben_Yeaton
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

I had an issue where my brakes would lock up, almost feel like the truck was slipping. Turned out to be the booster plunger (rod) that engages with the master cylinder. It was too long, making the brakes engage even without a foot on the pedal. And then as it got warm, it got worse. I would start there as well.
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Old 04-20-2017, 06:28 PM   #4
The Rocknrod
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

Check Booster Pushrod Adjustment - Not Brake Pedal Push Rod:
http://www.classicperform.com/TechBo...ot.htm#pushrod
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Old 04-20-2017, 06:44 PM   #5
chevy_mike
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

Quote:
Originally Posted by The Rocknrod View Post
Check Booster Pushrod Adjustment - Not Brake Pedal Push Rod:
http://www.classicperform.com/TechBo...ot.htm#pushrod
Yep, it doesn't take much to cause a problem. Tool is available on Amazon and I think even CPP sells it.
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Old 04-20-2017, 11:30 PM   #6
rvrfoot
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

I just got a set up for mine 66 c10. Going to install it this weekend.I will post pictures.I went to cpp thay told me a few things to do.
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Old 04-20-2017, 11:43 PM   #7
nail pounder
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

Does it have any adjustment? It's supposed to have some "free pedal" when you press the brakes before they engage, I think about ". Without​ it, as the fluid gets hot it expands and applies the brakes. I had the same issue with my 58, I think I bought the master/booster from summit, anyhow, it has adjustment in the rod so a few minutes under the truck and problem solved. Also, don't overfill the master, fluid needs room to expand. Should be an easy fix.
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Old 04-21-2017, 12:15 PM   #8
sixty4bigwindow
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Re: CPP front disc brake swap, brakes sticking and smoking a bit

Thank you guys for your input so far! I have neglected to mention that before I put the dual MC on and did the swap, I was running the stock MC with the power booster... So the shaft adjustment was made for that original modification. After everything you guys have said, it sounds like my first step is going to be to adjust that shaft. I will do that this weekend, and update with details.

And for nail pounder, I think I am running a bit high on the fluid in the reservoirs, both of them are at about 85% to the top. That is probably a bit high. How much do you guys run in your MC's? Thank you!
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