Author Topic: 69 RF brake lock up?  (Read 9017 times)

Rufcar

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69 RF brake lock up?
« on: November 19, 2016, 09:31:13 PM »
Ever since I have this car (3yrs) and have re-restored this car almost entirely the RF disc brake locks up. I 1st removed the additional distribution valve someone added when they installed the new power front discs and that worked somewhat better. I have taken everything apart and if I press more then just a bit the RF locks right up. Any ideas? Tkx

1968RSZ28

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Re: 69 RF brake lock up?
« Reply #1 on: November 19, 2016, 11:23:12 PM »
Brake hose?

Paul

1969Z27

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Re: 69 RF brake lock up?
« Reply #2 on: November 20, 2016, 02:14:52 AM »
Should have only one distribution valve.


http://www.camaros.org/brakevalve.shtml
Russ 
68 RS L22/M20
69 SS L48/MC1

RAfbody

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Re: 69 RF brake lock up?
« Reply #3 on: November 20, 2016, 04:31:04 AM »
Brake hose?

Paul

I agree. Check the rubber hose going to the caliper. It could be weak and collapsing not allowing the fluid to return and release the piston(s).
Russ

Rufcar

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Re: 69 RF brake lock up?
« Reply #4 on: November 20, 2016, 04:25:47 PM »
I did check the hoses 1st and they looked fine as they are stainless and only a couple years old. I did take them apart!

jvb6648

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Re: 69 RF brake lock up?
« Reply #5 on: November 21, 2016, 12:00:38 AM »
What about the LF, blocked line, collapsed hose or frozen caliper. These conditions would send all the fluid to RF.
Jim
68 Z/28

Rufcar

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Re: 69 RF brake lock up?
« Reply #6 on: November 21, 2016, 04:33:26 AM »
Im going to tear into it tomorrow and I will report back Tkx.

Rufcar

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Re: 69 RF brake lock up?
« Reply #7 on: November 28, 2016, 08:25:57 PM »
I replaced the front brake hose and bleed the system again and the right wheel still locks up as before?

Sauron327

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Re: 69 RF brake lock up?
« Reply #8 on: November 28, 2016, 09:22:42 PM »
Incorrect intermediate rod length will result in one or both calipers to lock up.

Rufcar

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Re: 69 RF brake lock up?
« Reply #9 on: November 28, 2016, 11:00:28 PM »
Tkx Ill ck that next.

Sauron327

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Re: 69 RF brake lock up?
« Reply #10 on: November 28, 2016, 11:46:29 PM »
Just pump the brakes until it locks up, then loosen the MC to booster bolts. If it frees up, therein lies your problem.

L78 steve

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Re: 69 RF brake lock up?
« Reply #11 on: November 29, 2016, 12:49:18 AM »
Also try pumping the brakes till it locks up and loosen the bleeder. Any pressure in caliper?
69 Z/28 Dover White. SOLD
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C. SOLD
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Rufcar

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Re: 69 RF brake lock up?
« Reply #12 on: November 29, 2016, 01:23:50 AM »
Don't need to pump brakes locks up as soon as you touch the brakes a bit over a light push.

Stingr69

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Re: 69 RF brake lock up?
« Reply #13 on: November 29, 2016, 02:37:42 PM »
jack up front of car.  apply and release brakes. try to rotate right front wheel and see if it rotates freely.  If not, crack caliper bleeder screw open to release any pressure and try to rotate wheel again.  If it will now rotate freely, you have extra residual pressure in the line going to that caliper.

if it still does not want to rotate freely, your caliper is sticking.

Rufcar

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Re: 69 RF brake lock up?
« Reply #14 on: December 01, 2016, 08:51:05 PM »
I did everything you guys recommended except test pressures and changed out both hoses and bleed. right side locks up. Removed calipers blew out pistons checked for problems and put right side pads on left and left side on right bleed out system, right side still locks up. Right now everything is new except the distribution block and that's coming tomorrow. Hopefully that will solve the problem but I have my doubts! Jim