Question about 2005 Toyota Tundra

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2005 tundra, I flushed brake fluid and the norm brake job, I'm certain all air out of lines. I now have o pedal an no brakes. I also re built master cylinder ? HELP

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  • Robert Hawkins II
    Robert Hawkins II Dec 15, 2016

    The master cylinder was bad, it pumped for the bench bleed, but not enough pressure for normal operation. Thanks to everyones input.

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  • 35 Answers

Try bleeding the air out of the master cylinder crack the lines at the master cylinder the same way you would at the caliper then do the calipers

Posted on Dec 10, 2016

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Posted on Jan 02, 2017

  • 33 Answers

SOURCE: 2005 f150 spongy brakes

possibly new master cylinder is defective

Posted on Mar 24, 2009

emissionwiz
  • 75066 Answers

SOURCE: brake pedal dropping to floor

do u have the antilock brake bleeding tool? if not you will need to have the dealer bleed the brakes, the ABS control valve must be electricaly held open to bleed the brakes there of course is a special tool for this.

Posted on Oct 18, 2009

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SOURCE: 1998 chevy s10- brake pedal goes to the floor-

Did you put fresh fluid in the master cylinder? I really think you still have air in the lines. To bleed manually, start with the bleeder the greatest distance from the master cylinder, car running, helper pushing down about half way on brake pedal and releasing 3 times, on 3rd time, holding pedal down to half way depressed point while you open the bleeder valve. Repeat until you are sure all air has been flushed out. Check master cyl reservoir level often, because if it gets low and you **** air into the system, you have to start all over again. Go to wheel next greatest distance from master cyl, repeat above, working your way to wheel closest to master cyl last.

Posted on Apr 12, 2009

emissionwiz
  • 75066 Answers

SOURCE: Air/Hissing Noise from Brake Pedal

this noise is caused by a defective power brake vacuum booster, (big round thing behind the master cylinder) the diaphragm is leaking vacuum.

Posted on May 06, 2009

  • 10 Answers

SOURCE: Air/Hissing Noise from Brake Pedal

air may have gotten into your brake lines. try bleeding your brakes. this will require two people

Posted on May 29, 2009

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2 Answers

After flushing, I get brakes but they're soft. what am I doing wrong?


A bad master cylinder usually gives a pedal that will gradually drop to the floor after braking, i.e. stopped at a light, the vehicle will start to crawl and you'll have to increase pressure or pump the brake. Sounds like the problem is not being caused by the master cylinder but by the calipers. The caliper pistons and master cylinder piston MUST operate as a matched set for volume of fluid displacement.

Are you certain the calipers are an exact match for the vehicle, i.e. the master cylinder used in your Avy??? Do a couple of quick pumps bring up the pedal and it remains firm under pressure?

If the volume of brake fluid displacement for the new caliper pistons to expand exceeds that of the old calipers, the pedal will go lower because you only get one stroke of a given volume displacement from the master cylinder's in line pistons no matter how much fluid is in the reservoir...a larger volume of the caliper pistons will lower the pedal, too much and the pedal will hit the floor....if so, either go back to calipers with piston displacement similar to the old volume or get a master cylinder with a larger bore piston so the displacement matches that of the calipers pistons.......

Replaced and added to my original post:

If your brake specialist agrees that the above is causing the problem, and you decide to replace the master cylinder rather than going back to the old calipers, you will also have to make certain that the proportioning valve assembly is compatible with the new arrangement.

Apr 16, 2016 | Cars & Trucks

1 Answer

Brake pedal is intermittent spongey on my 2005 silver ado Z71


One of two issues are typical. Either a bad wheel cylinder(s), or a bad Master Cylinder. The sponginess is caused by air or some other contaminant in the hydraulic fluid. It's intermittent because the more often you use the brakes, the hydraulic pressure is built up. If you pump the brakes before stopping, the sponginess will be less. Check all brake cylinders, and Master Cylinder, and possibly a complete Brake system fluid flush.

Mar 31, 2014 | 2001 Chevrolet Silverado 1500

3 Answers

How to bleed brakes on a 2000 toyota tundra


Start with bleeding master cylinder, have some one pump pedal 3-6 times while lines at master are tight then loose fittings at master a few sec then snug repump aft each snug untill all bubbles are out you have to do both lines,

Mar 04, 2013 | 2000 Toyota Tundra

1 Answer

Air in the fluid master cylinder


Do you mean the brake master cylinder? As long as the fluid is at the full mark, and you have no air in the brake lines, it is fine. A spongy brake pedal and poor braking operation happens when air is in the lines. Air can get into the lines when the fluid in the master cylinder is very low, almost out, or when a brake line is pulled apart (like when replacing calipers). To get the air out, one has to bleed the brakes-starting at the rear tires-the longest run from the master cylinder-and ending at the driver's wheel -nearest the master cylinder. Opening the bleed valve at each wheel in turn and pumping the brakes will force fluid into the lines and push the air out the bleed valve. When done properly, all the air in the brake lines should be expelled, and the brake pedal returns to it's firm pedal and good braking efficiency.

Jul 10, 2012 | 1993 Toyota Supra

2 Answers

The brake cylinder in the right rear tire started leaking. I changed it and bled the brakes., now they won't stop and will go all the way to the floor. where and how do I adjust them? THANK YOU jOE!


You may need to further bleed the brakes. Something pumping to bleed the brakes can **** in air at the brake fluid reservoir. Try using a vacuum pump to **** out brake fluid from the release screw at the brake side. Make sure you always have enough fluid at the reservoir.

Feb 28, 2011 | Chevrolet Caprice Cars & Trucks

1 Answer

How to bleed brakes on 1997 Saturn


The brake system bleeding procedure differs for ABS and non-ABS vehicles. The following procedure pertains only to non-ABS vehicles. For details on bleeding ABS equipped vehicles, refer to the ABS procedures later in this section.

WARNING Make sure the master cylinder contains clean DOT 3 brake fluid at all times during the procedure.
  1. The master cylinder must be bled first if it is suspected of containing air. Bleed the master cylinder as follows:
    1. Position a container under the master cylinder to catch the brake fluid.
    2. Loosen the left front brake line (front upper port) at the master cylinder and allow the fluid to flow from the front port.
    3. Connect the line and tighten to 24 ft. lbs. (32 Nm).
    4. Have an assistant depress the brake pedal slowly one time and hold it down, while you loosen the front line to expel air from the master cylinder. Tighten the line, then release the brake pedal. Repeat until all air is removed from the master cylinder.
    5. Tighten the brake line to 24 ft. lbs. (32 Nm) when finished.
    6. Repeat these steps for the right front brake line (rear upper port) at the master cylinder.
WARNING Do not allow brake fluid to spill on or come in contact with the vehicle' finish, as it will remove the paint. In case of a spill, immediately flush the area with water.
  1. If a single line or fitting was the only hydraulic line disconnected, then only the caliper(s) or wheel cylinder(s) affected by that line must be bled. If the master cylinder required bleeding, then all calipers and wheel cylinders must be bled in the proper sequence:
    1. Right rear
    2. Left front
    3. Left rear
    4. Right front
  2. Bleed the individual calipers or wheel cylinders as follows:
    1. Place a suitable wrench over the bleeder screw and attach a clear plastic hose over the screw end.
    2. Submerge the other end in a transparent container of brake fluid.
    3. Loosen the bleed screw, then have an assistant apply the brake pedal slowly and hold it down. Close the bleed screw, then release the brake pedal. Repeat the sequence until all air is expelled from the caliper or cylinder.
    4. When finished, tighten the bleed screw to 97 inch lbs. (11 Nm) for the front, or 66 inch lbs. (7.5 Nm) for the rear.
  3. Check the pedal for a hard feeling with the engine not running. If the pedal is soft, repeat the bleeding procedure until a firm pedal is obtained.
zjlimited_349.jpg

Fig. 1: Loosen the front brake line in order to bleed the master cylinder

zjlimited_350.jpg

Fig. 2: Connect a bleed hose from the bleed valve on the front caliper to a jar of brake fluid

zjlimited_351.jpg

Fig. 3: Always follow the lettered sequence when bleeding the hydraulic brake system





Hope this helps to solve it; remember to rate this answer.

Dec 29, 2010 | 1997 Saturn SL

1 Answer

Bleeding brakes on 2005 jeep liberty


you will have too take brake lines off by the master cyclinder by the brakes and have some one pump the brake pedal in and out catching the fluid in a gug and keep pooring fluid in fill container till all aire is out of lines

Jul 12, 2010 | 2005 Jeep Liberty

4 Answers

Brakes are hard at first then the pedal slowly goes to the floor.


You need a new master cylinder. I'm assuming that you aren't losing brake fluid from a leak somewhere.

As the master cylinder wears out it's internal seals allow fluid to leak past the pistons. None actually leaks out of the brake system so you don't see the leakage on the ground under the car and the brake fluid level remains constant.

Replacing the master cylinder is not hard from a technical standpoint but it is a job you'll want a service manual's help with just so you know the proper steps to take. A small, hand operated, vacuum pump is a godsend when you get to the part of bleeding the brakes and this is a good time to flush the brake lines anyway. Proper tools are a must, get a proper line wrench to avoid damaging the brake lines when you remove them from the master, and be careful when reinstalling the lines that you don't start them crooked and cross thread the line fittings.

A good quality rebuilt master cylinder will do the job, or you can spring for the new factory part. Back in the day we used to rebuild them but finding a rebuild kit is impossible these days.

Feb 18, 2010 | 1992 Honda Accord

3 Answers

Brakes are spongy,light keeps coming on,even after bleeding them


If there are no leaks from wheel cylinders, calipers and lines, likely there is a bypass condition in the master cylinder. If so, replace it.

Jun 25, 2009 | 1989 Plymouth Voyager

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