Question about 1994 Ford F250 Supercab

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Brakes i just put on a new master cylinder because i have had bad brake problems, but when i was bleeding the back brakes there was no fluid coming out, only in the front. i realize i got a new problem is there anyone who might have an idea?

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Hi you may have a colapsed rubber brake hose going to the rear from the frame to axle.try to open the passanger rear bleader and let it just sit for a wile to see if you get fluid.if yes then continue bleading. if not remove steel line from the inlit of the rubber line and check for fluid.if fluid then replace rubber brake hose. if no fluid then check for fluit at master cylnder.

Posted on Jan 30, 2009

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You might have a nother line leaking, or just not enough patience for the fluid to run to the back.

Posted on Jan 30, 2009

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First of all, I hope you got a new master cylinder with your disc brake kit. A new master cylinder should be bled before connecting the brake lines and then never allowed to pull in air during the rest of the bleeding process. A couple of fittings ans hoses should have come with the new master cylinder [see the kit listed for a picture]. If the master cylinder has an air bubble, you won't be able to properly bleed the rest of the system.
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No Brakes, changed Booster, thought it was air in the lines. When bleeding no fluid coming out of front right and back brake bleeder valves. Checked rubber line, is ok. Clogged somewhere in the line. Have...


Is the master cylinder good? a bad master can cause this also did you bleed the master first before bleeding at the wheel and also make sure the bleeder screw is clean, if the hose is good then theres only a few things, a bad master or a master that wasnt bleed, try bleeding the master first then try rebleeding the brakes.

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Booster is okay, you have to bench bleed the MC, first. So, since it is installed, bleed it with a kit from the parts store, little plastic hoses screw in to the brake hose fittings, and put other end under fluid in reservoir. pump slowly, especially wait at end of release, for fluid to refill piston chamber....pump until no bubbles...

FROM THIS POINT you must not allow fluid in reservoir to go low, or start all over again....

Now bleed the brakes and you will eventually get pressure.

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No brake fluid to the rear wheel cylinders


You'll need to start bleeding the brake system at the Master cylinder to determine where the problem lies.

The lines coming out of the master cylinder will need to be loosened & bled there, initially you can just do the back ones to identify the problem, but once fixed, the system will have to be bled from the Master cylinder first, then the farthest wheel from it, then next farthest, then next, until you do the drivers wheel last.

This method of bleeding the brakes prevents air from crossing from one line to another, causing air to be left in the system.

Back to bleeding the rear brakes first: As someone pumps up the brake pressure, making sure the resivoir stays full, with the cap on between bleeding, and have the person pressing the pedal to do these thngs.
1. Always move the pedal slowly, pressing and releasing.
2. Never release the pressure on the pedal after bleeding a brake, until the line is tightened, then release slowly to prevent air from getting into the fluid.

You should of course get fluid at the master cylinder when you bleed it (or just replace it), then you'll need to bleed the line at the right rear wheel (first) a few times to get fluid if it's been leaking, then the left rear wheel. If you get pressure but no fluid to the rear and the master cyliinder did have pressure released when you bled it, there is either a restriction in the line itself, or the porportioning valve could be damaged. (unusual for the valve to go bad actually, inspect lines for damage such as being pinched if you're getting pressure but no fluid.

Final test if it hasn't been resolved-remove lines at porportioning valve & make sure fluid is leaving/entering there as it should. If you find it defective, a good replacement can come from a salvage yard, or you can buy them new.

Brake fluid on the floorboard under the dash near the brake pedal=bad Master Cylinder.

good luck

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Try bench bleeding the master (there are cheap tubing kits for this) and see if fluid comes out of the ports. If no fluid after bench bleeding, replaced the master cylinder (usually come with a cheap bleeder kit anyway)

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