Question about Ford F-150
Leaking from line that leads from master cylinder
Posted by Anonymous on
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Posted on Jan 02, 2017
I only replace what is needed they are time consuming and all four breaks will need to be bleed only diagram is what you have under the van cut out the damaged section take it to parts store and get the size you need make sure you get all fitting at this time also good luck
Posted on Apr 28, 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
There is a special tool required to bleed the brakes, it plugs into the ABS hydraulic control under the hood and holds the ABS valves open to remove the trapped air during bleeding, u will need to have the dealer bleed the brakes, they are most likely the only ones that will have this special too, but u can try an outside shop, I am sure Snap on tools makes this tool in the aftermarket tool catagory..
Posted on Dec 18, 2009
I take it you have a rebuilt master cylinder. (It can happen to new ones also!) It is quite possible that the 2nd piston seal in the master cylinder is either installed incorrectly or was damaged during installation by who ever assembled it. You can install a PLUG in the front piston outlet hole and try it again. If it is still spongy.... the replacement Master cylinder is bad. (my therory... when in doubt change it out... when it comes to master cylinders)
Take the cylinder back and get another one. (warranty!!!) I have had this happen a few times over the years. Just one of those misfortunes of the task.
Thanks for using FixYa.
Posted on Mar 07, 2010
The LF and RR are in an independent circuit of the RF, LR wheels.
The master cylinder already has the lines hooked up in a way that if you trace the lines, you can make your own diagram.
Posted on Aug 03, 2010
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