1995 f350 brake slowly falling to floor - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 11 (permalink) Old 11-19-2018, 03:27 AM Thread Starter
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1995 f350 brake slowly falling to floor

I have a 1995 f350 and have been having break issues, when the truck is off the peddle is hard as a rock when i push it, but when i start it and the truck is running if i push the brake it will slowly fall to the floor i can pump the brake back up and its hard then falls back to the floor, I've bleed and rebleed all of the lines have no breaks in the lines and have replaced the booster with no luck, any help on this issue would be helpful the truck has 200k on it if that helps at all
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post #2 of 11 (permalink) Old 11-19-2018, 09:15 AM
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Re: 1995 f350 brake slowly falling to floor

could be a bad master cylinder, or a bad RABS valve if all the lines and wheel cylinders are good.

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post #3 of 11 (permalink) Old 11-19-2018, 01:36 PM
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Re: 1995 f350 brake slowly falling to floor

Seems to be a common problem with them. Have replaced my master cyl ,no better. Guess the next step will be the RASB valve. This problem is on my 93 dually
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post #4 of 11 (permalink) Old 11-19-2018, 06:14 PM
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Re: 1995 f350 brake slowly falling to floor

Mine does this as well, I’m thinking this was a known issue but I can’t find where I saw that at. I went through 3 master cylinders and bypassed my RABS and it never went away.


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post #5 of 11 (permalink) Old 11-20-2018, 02:13 AM
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Re: 1995 f350 brake slowly falling to floor

I can't believe for how common this problem seems to be that no one has come up with a solution.
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post #6 of 11 (permalink) Old 11-20-2018, 09:33 AM
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Re: 1995 f350 brake slowly falling to floor

my solution was bypassing the RABS. the brakes have worked fine for 29 years now.

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post #7 of 11 (permalink) Old 11-21-2018, 03:28 AM
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Re: 1995 f350 brake slowly falling to floor

Quote:
Originally Posted by tjctransport View Post
my solution was bypassing the RABS. the brakes have worked fine for 29 years now.
How did you go about that?


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post #8 of 11 (permalink) Old 11-21-2018, 09:20 AM
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Re: 1995 f350 brake slowly falling to floor

got a piece of brake line, removed the lines from the RABS valve, and put the new line in the valves place. then bled the rear brakes.

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post #9 of 11 (permalink) Old 11-22-2018, 02:04 PM
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Re: 1995 f350 brake slowly falling to floor

Many times when this issue comes up it is due to air in the system or the rear shoes are out of adjustment. Try bleeding the system and then checking the rear brake adjustment.
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post #10 of 11 (permalink) Old 11-26-2018, 02:37 AM
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Re: 1995 f350 brake slowly falling to floor

Symptoms are also found with an internal master cylinder leak, meaning the fluid is leaking around the seals that provide pressure when you push the pedal, but does not leave the master cylinder.
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