Question about 1989 Ford F 250

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89 ford f-250 4x4 diesel replaced all brake components including rabs valve,booster,master cyl,calipers,rear shoes andwheel cyl.blead over 3 quarts fluid peddal slowly bleeds off hardly no brakes second pump

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: Replacing a RABS Valve

In order to bleed the RABS there is a special tool that plugs into the connector of the RABS and holds the solenoids open to facilitate bleeding, you will need to take it to a brake specialists that has a tool to do this.

Posted on Oct 15, 2008

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  • 196 Answers

SOURCE: fading brake pedal

Perfect well at this point i would say that tha abs valve is bypassing fluid. If you can un hook the line that comes into the abs valve and plug it and try and bleed the system where you cap the line going into the abs valve. If you get a good pedal after pluging the line going into the abs valve this tells me that the abs valve is bypassing fluid give it a try i have ran into this a few time and the abs valve has been bad. Also can you rate this sluton also i do hits on my own free time thanks good luck

Posted on Jan 18, 2009

jaysonemanme
  • 500 Answers

SOURCE: Brakes

check to see you haven't mounted the calipers on the wrong sides. bleeders should be on top not the bottom. RABS block is on the framerail near the drivers door

Posted on May 19, 2009

conrynsilver
  • 56 Answers

SOURCE: 89 ford e350. Brake

If the truck has RABS, the ABS system needs to be bled.

Posted on Oct 24, 2010

Autotroubles
  • 987 Answers

SOURCE: 1999 Ford E350 van problem:

Good question, on the antilock system is a bleader too and bleade it the same way you bleade the caliper. After all is done adjust the rear brakes, they should have a drag to them.

Posted on Feb 28, 2011

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2 Answers

I have 1996 Ford e-350 dual rear wheels with 4 wheel ABS system and spongy brake pedal ( goes to floor) before slowing down. I have put on 1 NAPA and 2 Advance Master Cyls. and a new brake booster, Bled...


Easiest way to check the master cyl. is to remove the lines and thread in plugs to block the ports. Then step on the pedal and if its hard and not fading you know the master is ok. If the rear brake shoes are wore out or not adjusted correctly you will have a low/spongy pedal
I have seen the RWAL valve cause this problem several times. You can still buy them through aftermarket parts suppliers since Ford discontinued it.
Also have a assistant check the firewall for flexing when the pedal is applied. It is not uncommon for the firewall to crack where the booster mounts and then the firewall flexes.
I also remember having to change the master cylinder to one with a larger bore to correct the problem you are describing. I believe there is a service bulletin on that with part #'s

Nov 04, 2013 | Cars & Trucks

1 Answer

Proportioning valve 1988 f350


The reason is, you have a rear anti lock brake system. The anti lock valve is located on the frame just underneath the brake master. It is called a RABS valve. Almost impossible to bleed. But it can be done. A dealer has a tool that plugs into the RABS valve which activates the valve constantly moving the valve back and forth. This will then push all fluid and air out of your open bleeder screws in the rear.
I did'nt go to the dealer. i was too stubborn. My solution was to lift the rear of the truck and place on jack stands. Pinch off the rubber brake hoses on the 2 front brakes with a C-clamp or non marring vise grips, this will keep all fluid from going to front brakes. Next adjust the rear brake shoes by tightening the adjuster on the rear brake drums. Tighten the brakes on the rear until the brakes start to drag and the tires no longer spin freely by hand. Attach a bleeder hose to the bleeder screw on the RABS valve, place open end of hose into a jar or canister of brake fluid, so as not to draw in any air. Open the bleeder screw. Start the vehicle up, put it in gear, and let the rear tires spin. (I got up to 25mph on my speedometer) Step on the brake while it is in gear and the tires are spinning. This will activate the RABS valve and cause the air in the RABS valve to bleed. Do this several times. Put vehicle in park, shut off engine, and close the bleeder on the RABS valve. Attach bleeder hose to right rear of the truck, place open end of hose in a canister or jar of brake fluid so no air gets in and open the bleeder screw. Start the vehicle up, put it in gear, and let the rear wheels spin freely. As the wheels spin, you press your foot on the brake pedal, this will activate the RABS valve, and effectively bleed the brakes. Do this a dozen or so times, tighten the bleeder screw and do the other side. Remove clamps from front brake hoses and you will be go to go. All this may seem a bit extreme, but it is the only effective way to bleed a Rear Anti Lock Brake System on an early Ford. All the steps I laid out are necessary. You cannot skip one. The reason why the rear has to be in the air, is that there is a sensor mounted to the rear differential that senses wheel spin(or axle spin), this goes directly to the RABS valve and tells it that the tires are moving at a certain speed, and to activate the Rear Anti Lock Brakes when the brake pedal is depressed. It will not activate if it does not sense movement. The reason for pinching off the front brake lines, is that there are needle valves in the master cylinder and they will send too much fluid to the front calipers, and stifle or hinder the amount of fluid needed to go to the rabs valve and ultimately the rear wheel cylinders. It seems like a lot, and it is, but I did it and it works. Good luck

Mar 29, 2012 | Cars & Trucks

1 Answer

1999 Ford E350 van problem: brake pedal is soft; have replaced master cylinder, rear wheel cylinders, rear brake shoes and drums, front calipers, rotors and discs; have bled master cylinder before...


Good question, on the antilock system is a bleader too and bleade it the same way you bleade the caliper. After all is done adjust the rear brakes, they should have a drag to them.

Feb 23, 2011 | 2007 Ford E-350 Super Duty Length XLT

2 Answers

I have very little rear brakes on my 91 w350. the shoes are fine and so are the wheel cylinders. I have recently replaced the master cylinder and had the system power bled at a shop. Is it the...


I assume you bled the rest of the system. If so check your rear adjustment. Adjust the parking brake at the same time. If no fix, then open up your rear brakes and inspect the hardware, cylinder/caliper, and adjuster. Only after all that would I suspect the proportioning valve. Ways to test that vary vehicle to vehicle. Good luck!

Apr 20, 2010 | Dodge W250 Cars & Trucks

1 Answer

89 c1500, full pedal on brakes until started then goes to floor. Bled system,replaced master cylinder and anti-lock system,now has better pedal but code 4 on brake lite that won't go out. Have replaced...


adjust your rear shoes up so that the rear drums just turn, with them ajusted to a low setting the brake pedal will be low .
also when you start your engine it is noral for the pedal to drop because of the boster ! [ but not to the floor ]
Bruce Pike

Oct 10, 2009 | 1989 Chevrolet C1500

1 Answer

Brakes


check to see you haven't mounted the calipers on the wrong sides. bleeders should be on top not the bottom. RABS block is on the framerail near the drivers door

May 11, 2009 | Ford E-350 Super Duty Cars & Trucks

4 Answers

Pedal goes to floor on 92 F250


I would strongly recommend checking your trucks R.A.B.S. (Rear Antilock Brake System) valve . It is located on the left frame rail just under where your left foot would rest . They can leak internally and exhibit the problems you are describing (loss of pedal , with no fluid loss) .
It is highly unlikely that a power booster would cause this , as a failed booster will show itself in these ways . 1) a hissing sound when you apply the brakes (indicates a vacumm leak) 2) rough engine idle/stalling when brakes applied (also indicates a vacumm leak) or 3) No power assist (brake pedal hard to push) .
If you do discover your hydraulic problem is in your RABS valve , don't forget to bleed it ,(there is a bleeder valve on it) and the rear brakes again after you replace it .
Hope this helps
Doug

Oct 31, 2008 | 1992 Ford F250

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