Question about 1995 Dodge Ram 2500

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Bleed proportioning valve

Beading the proportioning valve

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You don't bleed these. They are part of the system. Bleed the brakes normally.

Posted on Nov 12, 2014


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I have brake fluid leaking, when i press the brakes, out of the bottom of what i think is the height sensing proportioning valve

it is a load proportioning valve that adjusts the proportion of brake pressure according to the load on the vehicle
best to get a new unit and replace it then bleed the air out of the brakes

Aug 13, 2017 | Cars & Trucks

1 Answer

Hi I am from Norway and have replaced my proportion valve for rear brakes on my Corolla 1996 1,3 xli wagon.I am wondering how I can bleed off air and flush back to new brake fluid.Do I need to connect a...

None of those things . Just bleed the brakes normally starting from the longest line and ending with the shortest. The proportioning valve will always let brake fluid through, just not enough to lock up the rear brakes until you press heavy on the pedal . It is there so that full pressure to the large front brakes is reduce in proportion to the smaller rear brakes.

Jan 23, 2014 | 1996 Toyota Corolla

1 Answer

I just replaced the brake master cylinder and rear wheel cylinder on my 1987 toyota pickup, and now I have no fluid going to the back brakes. Bleeding them does nothing

check for fluid before and after the proportioning valve by disconnection the line after the valve and applying the brakes, if no fluid after valve try before valve if fluid is there then it is a bad proportioning valve. you did bleed the master cylinder before connecting the brake line and trying to bleed the brakes all at once right? If the master cylinder was not bled first then a lot of air may have been forced into the rest of the brake lines.

Oct 01, 2011 | 1987 Toyota Pickup

1 Answer

1975 gm pick-up need to bleed the proportional valve

All bleeding is done at each caliper and wheel cylinder. The proportioning valve has no bleeder. The proportioning valve makes the front brakes engage before the rears do to prevent the rear brakes from causing a sideways skid.

Jul 21, 2011 | Chevrolet G10 Cars & Trucks

2 Answers

How do u bleed brakes on 1995 mercury sable?cannot get them bled all the way.Would it have anything to do with the proportioning valve?

yes, if you are trying to bleed the back lines the proportioning valve can possibly reduce pressure to the rear. Are you pumping up the pedal to bleed? In this car, the recommended procedure is to start with the pedal up, open the bleeder, push the pedal down, close the bleeder, allow the pedal to retract, wait 5 seconds, repeat. OK?

Oct 03, 2010 | 1995 Mercury Sable

1 Answer

Brake fluid does not flow to back wheels. I replaced lines

bleed master cyl ,abs, and check proportioning valve, proportioning valve if stuck will stop flow to back etc

Jul 25, 2010 | 1994 Buick Roadmaster

1 Answer

The rear brakes seem unable to bleed. i think the proportioning valve bad.

You are correct in assuming the proportioning valve,but it may not be bad,if it detects,loss of fluid pressure,it will shut down those brake lines.Try bleeding the master cylinder,then the wheels,and you may have to do it a couple of times,this will allow the proportioning valve allow the wheels with fluid pressure,if this was at all helpful,please rate,thank you,

Jun 27, 2010 | 1992 Mazda MPV

1 Answer

Installed new master cly.,bench bled, bled rr, broke off lr bleed valve (not opened), bled rf, tried bleeding lf but getting no fluid to caliper. is problem with proportiner valve?

The problem is probably that you must do the lr before moving to the front. The air in the lr will make it too spongy to bleed the front.
A wheel cylinder is only $25, so you might as well just replace it. And if you use vasoline or brake lube on the bleeder, it will not rust up on you next time.

Proportioning valves are not supposed to block a bleed. They can malfunction, but should not supposed to. And if you have the back working, that should reset the proportioning valve anyway. You can't leave the back. It must be finished.

Jun 07, 2010 | 1990 Plymouth Voyager

1 Answer

The ABS/proportioning valve is not working.

these trucks need a seperate bleed procedure for ABS you need a scanner to put it into this bleed mode,hope this helps if not get back to me and we'll go from there. please rate my fix as i strive to be the best

May 19, 2009 | 1997 Chevrolet Blazer

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