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Old 01-08-2018, 09:03 AM   #1
brandonodom18
 
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Default Brake problems

Alright guys Iím tired of this brake issue and I need help I have replaced both front caliper and lines along with both of the back wheel cylinders and adjusted them perfect and I have bled the brakes till Iím blue in the face what am I missing and I did bench bleed the master cylinder and I have done checked the booster and even put a separate check valve on it and I put new lines on it. I donít know what else to try and Iím at my white end I need some help now please cause currently I donít have a ride cause I have no brakes and thanks in advance
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Old 01-08-2018, 09:36 AM   #2
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no pedal after all that work?
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Old 01-08-2018, 03:11 PM   #3
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describe your bleeding procedure.

NOTE: the bleeder hose needs to RISE from the bleeder screw for a decent length in order to get bubbles to travel away from the brakes.

it SHOULD be,
-light pressure on the pedal
-open bleeder valve/screw
-slowly depress pedal
-close screw before it reaches bottom of stroke
-slowly let pedal return
-repeat.

also need to bleed at the distribution block. that weird triangle thingy.
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Old 01-08-2018, 03:32 PM   #4
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Ok I will try that today and the pedal sinks all the way to the floor and if I can ump it up it will hold but I have to pump it about 20 to 30 times
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Old 01-08-2018, 03:45 PM   #5
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thats a bad master cylinder.

go get a new one for 35 bucks. the seal is worn and the piston is pushing fluid around the seal and not building pressure.
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Old 01-08-2018, 10:19 PM   #6
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Ok you guys can say what you want I put yet another master cylinder on there and nothing is getting tighter the brakes I have bleed 3 times after I put them on and they are still not getting tight as they should be. And I know for a fact that the one I bought off of rock auto is good and the one I bought today is good. I have done everything but bleed the proportioned valve and I’m almost positive that thing is good cause we messed with it last night. I don’t know what to do I’m going crazy.
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Old 01-08-2018, 11:06 PM   #7
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did u bleed from furthest point first? IE ur back left? Or is it right on USA trucks?
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Old 01-09-2018, 12:19 AM   #8
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really sounds like you are still fighting air. Bleeding brakes can be a major PITA.
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Old 01-09-2018, 01:01 AM   #9
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I do driver's rear, pass rear, pass front and then driver's front.
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Old 01-09-2018, 02:52 AM   #10
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Just a thought. Does your master cylinder have an adjustable rod? That rod that inserts into the booster needs to be a specific length. I read every thing else you have done and this might be worth a shot.
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