Question about 1983 Toyota Land Cruiser

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We are not getting any pressure from the brake line. Master cyl & proportioning valve have been replaced

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: brakes

Flexible brake lines are probably balooning out causing pressure not to build up, replace flexible to the calipers.

Posted on Mar 03, 2009

cwbtat
  • 52 Answers

SOURCE: brake hydrolic pressure loss.

you still have air in the system,you need to cross bleed the system,RR,LF,LR,RF.if this does not work you might try picking up a hand operated vacum pump to help get all the air out.

Posted on Apr 29, 2009

askjhuber
  • 59 Answers

SOURCE: Where can I find a brake proportioning valve for my 97 S-10?

When people tell me they hate there ABS, alot of people who pull trailer do. I tell them just to pull the fuse this will stop them completely. Yeah theres a light ont he dash but that can alos be delt with by removing the bulb for it. But int he long run just pulling the fuse is quick and Free.

Posted on May 17, 2009

  • 599 Answers

SOURCE: 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

Posted on May 19, 2009

  • 335 Answers

SOURCE: brake lock-up

I suspect that you have front disc and rear drum brakes.You did not say which of your brakes are locking up. I suggest that if your front brakes are locking {skid} that means your rear brakes are not engaging. If your rear brakes are locking {skid} then I suggest you have problems with park brake or brake fluid leaking onto the rear shoes.
More info would help me help you. I will check back soon.

Posted on May 21, 2009

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1 Answer

Bled front brakes fine back ones not getting fluid


master cylinder have 3 sections. front, back and proportion valve.The valve control the pressure to the rear brakes.Start bleding from the master cylinder. if the pressure is good inspect the line for damage.if one line don;t have pressure replace master cylinder
Good luck

Aug 23, 2014 | 1985 Toyota Pickup

1 Answer

Replaced rusted brake lines but did not replace valve in rear lines will this cause brake fade in 1995 bonneville


BY brake fade away I take it that you mean the pedal goes to the floor after you taken your foot off the brakes. . The valve you left out is a compensator valve that proportions the pressure between front and back to stop rear brake lock up and side skidding. I think the problem is in the master cyl in that the nonreturn valve under the second piston is not working and hold residiual pressure in the rear lines (Assuming they are drum brakes). If not you will need to bleed the m/cyl by cracking the lines at it one ata time and emptying the cylinder of trapped air allowing a full charge of fluid every time you pump the brakes.

Mar 10, 2013 | Cars & Trucks

1 Answer

Not getting break fluid to the back lines


Hmm, well you're not telling us much like the make model year? Anyway to take a stab at it you may have a bad master brake cylinder or even a bad proportioning valve. Check to see if you have pressure at the proportioning valve. If so then the master cylinder is fine and your proportioning valve needs to be replaced. But if there isn't any pressure there then of course it's your master cylinder. But again since I don't know anything about your vehicle I'm assuming it's an older one with a standard type of braking system. As you get newer then you get into much more things that could go wrong.

Nov 22, 2012 | Cars & Trucks

1 Answer

1988 subaru gl with brakes that are froze up. Yesterday there weren't any brakes , pumped them and the y came back. drove it a mile and the brakes slowly got tighter and then completely stopped the...


if it locked up all 4 wheels then it could be a few things to look at.Start with what color the fluid looks like,if its a tan to dark brown then its time to replace it,either it got contaminated or water in it.Next look at how much brake pad and shoe is left.A good rule of thumb is to put 2 quarters together and measure them to the pads,shoes,and if the pad is thicker than the quarters than there good for now.If pads and shoe's are good then its time to move on to the master cylinder,proportioning valve,lines(metal and rubber).If the master cyl is not returning enough fluid(pressure) then it will lock the brakes.if the proportioning valve is bad it will do the same thing(some master cylinders have the proportioning valve built in to them)you will have to check to see if u have 2 or 4 lines coming off the master cyl.if its 2 then they split off to the other wheels brakes so check that.then check the lines for leaking fluid(and could let in air).Sometimes the ruber lines break apart inside so u wont see it,and lodge in any of the part mentioned above and lock the brakes also.

May 23, 2011 | 1988 Subaru DL

2 Answers

I have a 92 Oldsmobile Cutlass Ciera, the brake pressure is not equal. More pressure to the rear than to the front. I have checked the lines and hoses all seem OK. I think the trouble is the proportioning...


to start with unless u have replaced the front brake hoses they probally need replaced.and the valve can be found by following the lines out of the master cyl. to a spliter block looking thing . by the way there is a reset button on it that u may need a small. screw driver to push while someone pumps the brakes.hope this helps

Nov 14, 2010 | 1992 Oldsmobile Cutlass Ciera

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

Pontiac G6 read disk brakes not showing any wear, emergency brake is being used.


Proportioning valve is not centered and the rear brakes are not functioning. To correct..... have someone apply hard brake pressure on pedal and some else crack open the bleeder screw on the a frontwheel. A click can beheard. the bleeder must be oened and clsed quickly. Follow the brake line s from the brake master cyl and you will be led to the proportioning valve. There is a pin sting out of both ends. They must be equally extended out on bot ends. Good Luck, Ned

Sep 25, 2009 | 2009 Pontiac G6

3 Answers

No brake pressure


should not need to bleed module try giving the proportion valve afew good smacks sometimes this will dislodge the valve then rebleed

Jun 03, 2009 | 1998 GMC Jimmy

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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