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09-27-2023, 09:42 PM
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#1 |
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Registered User
Join Date: Dec 2020
Location: Blainville Canada
Posts: 6
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New disk brake
Hello,
My brake is all new, disk, line 3/16, galiper, booster, master cylinder and I find the pedal soft, it brake anyway, but no way the pedal will become firm the system is perfectly purged, no air bubbles in the line The rod on the master cylinder is adjusted. No leak. Any ideas ? Vacuum maybe. Thank you for help me 64 c10 |
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09-27-2023, 11:05 PM
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#2 |
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Senior Member
   
Join Date: Jan 2018
Location: Hickory Flat, GA
Posts: 4,428
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Re: New disk brake
Was bench bleeding the master before you installed it part of your bleeding process? If not, there's probably air in it still
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Christian Carpenter 1963 C10 - Frankentruck 283, 3 speed with overdrive Overdrive wiring here1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson |
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09-28-2023, 10:53 AM
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#3 |
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Registered User
Join Date: Sep 2006
Location: San Francisco
Posts: 4,777
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Re: New disk brake
I have that same problem but have gotten used to it. Some say you need to redrill a hole in the brake pedal stem. Now I would just have to remember up or down but I know it is about 1".
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"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 |
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09-28-2023, 10:57 AM
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#4 |
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Registered User
Join Date: Sep 2006
Location: San Francisco
Posts: 4,777
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Re: New disk brake
http://67-72chevytrucks.com/vboard/s...d.php?t=727826 Look at post #19 One says drill a hole 2" below the original.
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 |
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09-28-2023, 11:17 AM
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#5 |
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Registered User
Join Date: Jan 2011
Location: Tulare, CA
Posts: 733
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Re: New disk brake
64c20pickup,
I had the exact same problem with my 64 C10. I ended up making a home made pressure bleeding setup. Here's a link as to what I did - post #6. https://67-72chevytrucks.com/vboard/...d.php?t=633937 I'm pretty sure I still have everything if you need to borrow it. PM me if you want to borrow it. I tried everything in the book to get my brakes to bleed properly & nothing worked except my home made pressure bleeder. Even then I read you only needed about 5 PSI to get the brakes bled but I had to crank up the pressure to 25PSI to get mine bled. This was almost 10 years ago so my memory might be a little rusty. I used a 73 C10 master cylinder on my truck if it makes a differance. |
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