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Author Topic: locked up brakes.  (Read 8726 times)

fysh

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locked up brakes.
« on: April 05, 2009, 09:34:05 PM »
Ford Lightning:

Brembo Slotted Rotors
Hawk Ceramic Pads
Stock Calipers
Stock Master Cylinder

Without any warning front brakes locked up @ a stop light. Had the current brake set up for 2 weeks with NO issues. Now all of a sudden it chatters HARD and locks the front wheels down tight. Checked the lines and have no kinks. I'm assuming weak brake line internal walls or bad master cylinder. However, its odd that the brakes work perfect when driving in reverse, why is this?
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patsmx5

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Re: locked up brakes.
« Reply #1 on: April 05, 2009, 10:43:13 PM »
Some bolts are loose. Retorque everything. Should have used thread locker on all the bolts, bet you didn't. Does it one wheel or both?
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Quote: Originally Posted by Adam Hopkins
There is no such thing as too much boost. You could have too little rod, piston, or sleeve. But never too much boost.

crttaz

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Re: locked up brakes.
« Reply #2 on: April 06, 2009, 04:04:58 AM »
check valve
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OG before the OG'#039#039s

caged

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Re: locked up brakes.
« Reply #3 on: April 06, 2009, 05:42:09 AM »
Check valves are for drum brakes and he said they are stock calipers. If it has locked both fronts it will be a master cyl fault. Possibly a blocked compensation port.
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11.6@126mph 1993 mitsubishi GSR.

crttaz

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Re: locked up brakes.
« Reply #4 on: April 06, 2009, 05:52:55 PM »
really?

So ALL power brakes don't have a check valve in the vacuum line from the intake manifold?????

Tap the brakes and sucks the pedal down.......trust me NOT FUN when it happens!
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OG before the OG'#039#039s

lilpooh21186

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Re: locked up brakes.
« Reply #5 on: April 06, 2009, 07:09:00 PM »
line lock FTW ;D
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basmaps
tuning Dyno/street pm for details
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Towdogg

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Re: locked up brakes.
« Reply #6 on: April 06, 2009, 07:57:35 PM »
Quote from: lilpooh21186 on April 06, 2009, 07:09:00 PM
line lock FTW ;D

Whats up with that sig?

Change that shit to F.A.K.L.A.D.

You know you got that d-series love....
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Zeniceguycrx

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Re: locked up brakes.
« Reply #7 on: April 06, 2009, 09:58:08 PM »
sounds like a master/booster problem
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The 30psi king of rice

fysh

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Re: locked up brakes.
« Reply #8 on: April 06, 2009, 10:02:20 PM »
But, why do they work flawlessly when driving in reverse?
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caged

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Re: locked up brakes.
« Reply #9 on: April 07, 2009, 01:21:19 AM »
Quote from: crttaz on April 06, 2009, 05:52:55 PM
really?

So ALL power brakes don't have a check valve in the vacuum line from the intake manifold?????

Tap the brakes and sucks the pedal down.......trust me NOT FUN when it happens!


I ment check valve inside the master cyl which all drum brake cars have to keep pressure in the lines.
How can a broken vac check valve suck the pedal down??
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11.6@126mph 1993 mitsubishi GSR.

Zeniceguycrx

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Re: locked up brakes.
« Reply #10 on: April 07, 2009, 12:35:09 PM »
rear drums?
if so try adjusting the back first
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The 30psi king of rice

Hotrodlincoln

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Re: locked up brakes.
« Reply #11 on: April 07, 2009, 11:23:40 PM »
The brakes work in reverse because of the position of the calipers relitive to the hub,  somethings loose or installed incorectly
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kill yourself piss face
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