Question about 1991 Toyota Pickup

1 Answer

Brake Problem - Brake Won't Quit on my 4 x 4

I developed a leak in one of the break lines going to the rear. I replaced both the primary and secondary brake lines (it was the primary that blew) reasoning that they both had the roughly the same lifespan. I replaced the sections beginning at the first "union block" from which the primary brake lines split off to the front WCs. I proceeded to bleed first the MC then all of the individual WCs. The pedal still went to the floor. I then bled the Load Sensing Proportioning Valve (LSPV - the little square gizmo mounted above the right, rear WC). I did not touch anything on the LSVP but the bleeder valve. Presto! Now I had full resistance on the brake pedal. But now the brakes won't entirely release. Additional information: front pads were replaced not long ago. Rear shoes, never. Also the E brake handle goes full travel but does not activate brake. My gut tells me that the LSPV is involved somehow. Is there a connection here? Like, no brakes in the rear causing full extension of WC piston throwing the LSPV off balance or is the LSPV out of whack? Both? Neither?

Posted by on

  • kbayer200314
    kbayer200314 Jan 07, 2009

    I have a 1988 4runner that i just replaced a bad rusted brake line to and my brakes still only work the front end.. when i got the truck the guy that had it said in 13 years the parking brake never worked.. I am in need of help.. I get fluid out the LSVP when I bleed the brakes but still the pedal goes to the floor.. what next.. i have read that its probably not the valve.. could i have someting else sticking or not getting fluid to.. Keep in mind this is the rustiest truck i have ever seen, but the lines are not that corroded and 2 are nre from the valve..

  • Anonymous Mar 24, 2014

    which line goes to the inlet marked F on the lspv

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Master
  • 1,861 Answers

The LSPV is not the issue. It simply allows more fluid to go the the rear WCs whilst carrying a load. More load = more fluid to the rear brakes.

What I suspect, based upon the info you have provided so far, is that the rear brake pivot mechanisms, for the park brake, are seized. Pull on the rear park brake cables at each side, and see if the metal thing on the backing plate moves freely. If not, that metal thing is seized, and either needs taken apart & lubed, or, if it is severly seized, replaced. This is a VERY common problem. Rectify the park brake pivot concern, readjust the rear brakes, and see if this does not cure your problem. If you have any other question, please feel free to post back.
Hope this helps, and, thanks for choosing FixYa!

Posted on Nov 03, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Brakes go to floor


If the brake master cylinder is full with approved DOT 3 brake fluid and the vacuum line that attaches to the brake booster is in place and not leaking or disconnected at either end, check for leaking fluid on all 4 tires, if you find no fluid at the tires indicating a caliper is leaking then the problem is the master cylinder being bad.

Aug 08, 2011 | 1996 Dodge Neon

1 Answer

Hi I changed the master cylinder in my 1977 f 150 and found I had leaks in the rear break line. I plugged off the rear break line at the master cylinder,hoping to at least have front breaks, however I...


Hi, if you plug the port, the plunger will not be able to build pressure in the front lines as the back brake section of the master will hold the plunger back. The proportioning valve will also not let you do this, as it is trying to strike a balance between the front and rear brake pressure. I'm afraid you need to repair the rear brake lines. This is not hard work, but it does require a brake line tool for cutting and flaring the lines. You may be able to borrow the tool, or check to see how much a brake place would actually charge to replace the lines. The supplies are cheap, and the labor isn't really very long--maybe a couple hours.

Feb 01, 2011 | Ford F-150 Cars & Trucks

4 Answers

Brake pedal to floor have replaced brake pads and master cylinder


Did the pedal go to the floor beforehand? Was the master cylinder leaking, and did you bleed it properly? If the master cylinder was not leaking, check your brake lines going to the rear wheels.

Jan 29, 2011 | 2000 Chevrolet Blazer

2 Answers

Leaking break fluid from rear what is that coming


From your discription, if it is square in shape and has 3 brake lines attached to it, it is the rear brake junction block. Double check and make sure it isn't a brake line that is attached to it. If the leak is above the rear axle on back of the wheel, that's the rear wheel brake cylinder.

Apr 10, 2010 | 2002 Chevrolet Avalanche

4 Answers

I replaced my front pads ,master cylender, adjusted rear brakes and the pedel is better but still wont lock up the tires even if you press pedel to the floor all service was done by a pro mecanic help!!


has brake booster been checker out? has vacuum line to booster been checked? has the flex brake line that goes to the divider valve on rear end been checked to make it is free of obstruction?

Sep 18, 2009 | 1990 Chevrolet K1500

3 Answers

Rear wheel mazda 323 m reg


Sounds like you have a leak in the brake system. The fluid you are seeing is brake fluid.

You need to get this fixed asap.

Apr 05, 2009 | 1991 Mazda 323

1 Answer

I need a schematic for the rear brakes on an F150 super cab with 4.6L automatic trans 4wheel drive


Drum, Rear Brake System Standard Rear Brake
9969082.gif
Item Part Number Description 1 2069 Brake Shoe Hold-Down Spring Pin 2 — Rear Wheel Cylinder Retaining Bolt (2 Req'd) 3 — Washer (2 Req'd) 4 — Anchor Pin (Part of 2211) 5 — Wheel Cylinder 6 2028 Brake Shoe Anchor Pin Guide Plate 7 2A637 Parking Brake Lever 8 2296 Brake Shoe Retracting Spring (Short) 9 2296 Brake Shoe Retracting Spring (Long) 10 2200 Rear Brake Shoe and Lining (Secondary) 11 — Washer 12 2106 Parking Brake Lever Pin Retainer 13 — Brake Shoe Adjusting Lever Cable Guide 14 2A642 Primary Brake Shoe Parking Brake Lever Link 15 2A601 Parking Brake Link Spring 16 2068 Brake Shoe Hold-Down Spring 17 2A176 Brake Shoe Adjusting Lever 18 2048 Brake Shoe Adjusting Screw Socket 19 2047 Brake Shoe Adjusting Screw Nut 20 2041 Brake Adjusting Screw 21 2049 Brake Shoe Adjusting Screw Spring 22 2200 Rear Brake Shoe and Lining (Primary) 23 2A178 Brake Shoe Adjusting Lever Cable 24 2211 Brake Backing Plate
Heavy Duty Rear Brake
6dcb5d2.gif
Item Part Number Description 1 — Rear Wheel Cylinder Retaining Bolt 2 00538 Lock Nut 3 2212 Rear Brake Backing Plate 4 2262 Rear Wheel Cylinder 5 2A642 Primary Brake Shoe Parking Brake Lever Link 6 2A601 Parking Brake Link Spring 7 2A637 Parking Brake Lever 8 2106 Parking Brake Lever Pin Retainer 9 — Parking Brake Lever Bolt 10 — Secondary Shoe Assembly 11 2A179 Brake Shoe Adjusting Lever Cable Guide 12 2068 Brake Shoe Hold-Down Spring 13 — Adjusting Lever Pin 14 — Adjusting Lever Return Spring 15 2A176 Brake Shoe Adjusting Lever 16 2047 Brake Shoe Adjusting Screw Nut 17 2049 Brake Shoe Adjusting Screw Spring 18 2041 Brake Adjuster Screw 19 — Primary Shoe Assembly 20 2068 Brake Shoe Hold-Down Spring 21 2200 Rear Brake Shoe and Lining 22 2035 Brake Shoe Retracting Spring 23 2A178 Brake Shoe Adjusting Lever Cable 24 2092 Brake Adjusting Hole Cover 25 2069 Brake Shoe Hold-Down Spring Pin
The rear drum brakes:
  • Have internal shoes that expand against the brake drum (1126).
  • Are a single-anchor type.
  • Are actuated by one rear wheel cylinder (2262).
  • Have two pistons in the rear wheel cylinder (2261). One exerts force against the upper end of the primary shoe; the other exerts force against the upper end of the secondary shoe.
  • Adjust rear brake shoes and linings (2200) automatically.
  • Need manual brake adjustment if the adjusters are not operating properly or after the rear brake shoes and linings have been replaced.
When the brake pedal is applied, hydraulic fluid pressure forces the pistons in the rear wheel cylinder outward, moving the rear brake shoes and linings against the brake drum.
The rear drum brake system includes the parking brake mechanism. Refer to Section 206-05 .

Apr 04, 2009 | 1997 Ford F150 Regular Cab

2 Answers

84 El Camino breaks are going to the floor.


U are going to have to replace the power brake master cylinder and then bleed the brakes at each wheel, this is a 2 person job/

Mar 01, 2009 | 1984 Chevrolet El Camino

1 Answer

Keep getting air in break lines


1. bleed your vehicle while the engine is running. 2. Check ALL your brake lines, connections and wheel brakes cylinders or calipers of any leaks or moisture. 3. If nothing happens, your brake masters or your caliper's pistons may be weak and needs replacement.
post me of any development

Dec 09, 2008 | 1987 Mercedes-Benz Mercedes Benz 500 Class

Not finding what you are looking for?
1991 Toyota Pickup Logo

252 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

70347 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6876 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...