Question about Cars & Trucks
There may be air in the system, also may be out of adjustment, or could have a warped rotor. do the brakes shake at all when you apply them?
Posted on Apr 20, 2013
The brake hydraulic system is fairly simple, with a fluid well, pump, and piping and slave cylinders. You have checked the system fairly correct, but did not indicate a time related hydraulic action.
After pumping up the system, and it feels positive, hold your foot down for a while. Does it feel like it moving down:? If so, then your master cylinder has a internal bypass leak. This condition, will give you false readings and loss of brakes.
Posted on Apr 20, 2013
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Posted on Jan 02, 2017
Check out this link & read about combination valve & how to center it when bleeding.
Posted on Jan 23, 2009
I am a hydraulic technician and I can tell you that air is a killer in the hydraulic system.
Start from the rear and work your way forward. I f you are using the two person method, make sure the second person keeps the master cylinder full. If the fluid level dropped anywhere in between pressing and releasing the brakes....you have a lot of air in the system.
Make sure you are tightening the bleed valve when the brake pedal is full pressed.
Remeber...start from the rear brakes first, then do the front.
Posted on Mar 16, 2009
SOURCE: bleed brakes but no pedal
Good! You bled the master cyl. before installation! The proper order of bleeding the lines, is to start with the wheel the greatest distance from the master cylinder. Then work your way to the next greatest distance, and last, the closest wheel. Make sure all air is removed from the lines before you proceed to the next wheel, and frequently check the master cyl. level, because, as I'm sure you know, if you **** in air at the master, you have to start all over again. I'm assuming you don't have a power bleeder, so with a helper do this with car running (make sure it's on safety stands and not going to fall on you!) Pump pedal 3 times, no need to mash the pedal into the floor, just 3 pumps 1/2 way down, hold 3rd pump at half way down level while bleeder is opened, when flow is about to stop at bleeder, close bleeder and repeat til no evidence of any air. Let me know how it goes and if you need any help.
Posted on Apr 21, 2009
i try to help you, firts refill brake fluid container,open purge valve in one wheel front only,wait few minutes when drops fluid, close this valve and open other wheel, same procedure, finally repeat this in each 4 wheels
Posted on Jul 14, 2009
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