Question about Cars & Trucks
Could you tell me if there is two lines that go from the master cylinder to rear brakes
Rear brakes has two brake lines from mastercylinder to both rear wheels cylinders. front brakes has two brake lines from mastercylinder to front brake calipers for each front wheel.
Posted on May 07, 2013
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Posted on Jan 02, 2017
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: 2005 f150 spongy brakes
it sounds like your still not getting all the air out of your lines. it helps to have a brake bleeder but they are expensive, it also could be that the gasket inside the master cylinder is inverted even if it is a new master cylinder this could be the case, ive had four bad remanned ones in a row, before i got a good one... hope i could help
Posted on Mar 24, 2009
Honestly your guess is as good as mine. But I don't think the master cylinder is NOT bad you still have air in the system. Get a big bottle of brake fluid bleed all four sides until you run out of fluid or your brakes work properly. You should divide the bottle's content in four, then use each quantity in each side. You'll be removing air and contaminated fluid from the system. Get a small hose that fits on the bleeders and an appropriate container. I have a good feeling if you do this your brakes will work just fine. I don't know how you are bleeding the brakes. I'll let you know the proper way just in case. This is a two man job, with the wheel off, have someone start the car. Have them pump the brakes a few times to get pressure. 1With the brake pedal UP open the bleeder, 2then have your assistant press the brake pedal all the way down and leave it completely pressed down. 3Close the bleeder valve, once close and only with the valve closed have'm release the brake. Repeat as necessary, bake depressed, open valve first then press brake. DO NOT depress until valve completly closed. Close valve THEN depress. Good Luck!
Posted on May 15, 2009
You have a proportioning valve stuck. From the master the brake lines will run down the wheel well to another valve then out to the front calipers and rears when the prop valve sticks or freezes it then causes the rear or front system to lock up or not proportion the system evenly. 2. If that is not the case you may have contamination in the lines or the rubber brake hoses whick allow fluid to pass through it will not allow it to return almost acting like a back check valve therefore keeping you brakes on.
Posted on Jul 13, 2009
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