Question about 1990 Chevrolet Suburban

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Brake calipers i replaced master cylinder, both front calipers and brakes and no matter how many times i bleed the brakes i still have no pedal

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  • specht Jun 19, 2009

    yes, i have brakes when the car is NOT running but when i start the car i have no brakes

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  • 74 Answers

Have you tried with a freind open bleeder press brake close bleeder let go of brake some cars absolutley need to be bled in that order

Posted on Jun 19, 2009

  • streetswe258 Jun 19, 2009

    you sure your lines are not leaking?

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Did you 'bench vise' bleed the master cylinder? Also, the proper way to bleed the brakes is to start with the one closest to the master cylinder and work your way to the one furthest away. Did you re-hook up all vacume lines?

Posted on Jun 19, 2009

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1995 crown victoria brakes will not bleed


anual Bleeding
The primary and secondary (front and rear) hydraulic brake systems are individual systems and are bled separately. Bleed the longest line first on the individual system being serviced. During the complete bleeding operation, DO NOT allow the brake master cylinder reservoir (2K478) to run dry. Keep the master cylinder reservoirs filled with High Performance DOT-3 Brake Fluid C6AZ-19542-AA or DOT-3 equivalent meeting Ford specification ESA-M6C25-A. Never reuse brake fluid that has been drained from the hydraulic system or has been allowed to stand in an open container for an extended period of time.
NOTE: Non-ABS vehicles have the brake master cylinder (2140) mounted at an angle to the horizontal, bleeding may be better performed if the vehicle is positioned so that the brake master cylinder is horizontal.
  1. To bleed the brake system, position a suitable box wrench on the bleeder fitting on the brake wheel cylinder. Attach a rubber drain tube to the bleeder fitting. The end of the tube should fit snugly around the bleeder fitting.
  1. Submerge the free end of the tube in a container partially filled with clean brake fluid, and loosen the bleeder fitting approximately three-quarters of a turn.
  1. Have an assistant push the brake pedal (2455) down slowly through its full travel. Close the bleeder fitting, then return the brake pedal to full-release position. Repeat this operation until air bubbles cease to appear at the submerged end of the bleeder tube.
  1. When the fluid is completely free of air bubbles, secure the bleeder fitting and remove the bleeder tube.
  1. Repeat this procedure at the brake wheel cylinder on the opposite side. Refill the brake master cylinder reservoir after each wheel cylinder is bled, and install the master cylinder cap and gasket. Ensure the diaphragm-type gasket is properly positioned in the master cylinder cap. When the bleeding operation is completed, the fluid level should be at the MAX line to 4.0 mm (0.16 inch) below.
  1. If the primary (front brake) system is to be bled, repeat Steps 2 through 5 at the right front brake caliper and ending at the left front brake caliper. Bleed the brake master cylinder at the bleed screw after all calipers are bled.
  1. After disc brake service, ensure that the disc brake pistons are returned to their normal positions and the shoe and lining assemblies are properly seated. This is accomplished by depressing the brake pedal several times until normal pedal travel is established.
  1. Check pedal feel. If brake pedal feels "spongy" repeat bleed procedure, or use the Vacuum method as outlined in Section 06-09, but bleed both rear calipers first.

You can also pressure bleed it. If the abs module needs to be bleed, that requires a special tool. If you have already tried the procedure posted and it didn't work, I'm not sure what next?

Jan 30, 2018 | Ford Crown Victoria Cars & Trucks

1 Answer

I have replaced 3 disc brake calipers on my 2001 pt cruiser. after bleeding all 4 brakes 3 times, I started the car and brake pedal goes to floor. is my brake booster shot?


Michael:

You must start bleeding the brakes at the wheel farthest from the master cylinder (usually the right rear), then the next farthest from the master cylinder, then the next, then the closest. If your master cylinder is at the left front of the car, start with the right rear, then the left rear, then the right front, then the left front. If you don't bleed the brakes in the correct order, you are just shifting the air in the lines from one line to another. Make sure that you close the bleeder before letting the brake pedal up, and the engine should not be running when you bleed the brakes... Make sure that the emergency brake is off. Make sure that the master cylinder does not run out of brake fluid at any time that you are bleeding the brakes.

Jan 24, 2016 | 2001 Chrysler PT Cruiser

1 Answer

I have replaced the master cylinder on my 2006 chrysler town and country about every week we keep losing brake pedal so we have bleed them and get pedal back. the only place i find air is the front driver...


Could be a couple of problems, bad master cylinder (not bench bled properly or bad seal out of the box, I have had a few like that), proportioning valve seal, brake line not tight/sealed properly sucking air into system,bad caliper. First of all, are you losing brake fluid along with your pedal? Need to know that first. If you are, try to find where you losing it from, you will find your problem. There can be absolutly NO leaks in a brake/hydraulic system. If not, check that all lines are tightly seated and nuts are quite tight using a line wrench to get proper torque. If so, you can replace the master cylinder again (take old one back to store for new one under warranty) and be sure to thoroughly bench bleed. When bench bleeding, take your time, do not push plunger in too quickly, use a SLOW steady push until ALL bubbles, no matter how small have been eliminated. Tapping on the bottom of the cylinder while bleeding will help remove trapped air. Even a very small amount of air will take forever to bleed out at the calipers. If cylinder/all calipers/lines appear to be right, I would suspect the proportioning valve is faulty. To find it, follow brake lines from master cylinder to where they go into the valve. Replace. Hope that helps.

May 30, 2011 | 2006 Chrysler Town & Country

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

2 Answers

My 1997 chevy 1500 z71 brakes suddenly going all the way to the floor. Checked brake fluid and it was low. Could be wheel cylinder? Master cylinder? or ?


well, check the brake lines for leakage after adding brake fluid to the full mark. If the brake pedal goes all the way to the floor, it's likely there is a leak somewhere after the master cylinder. If the pedal gets hard after adding fluid, and pumping it several times with the car off, then the master cylinder is still ok.

If air has gotten into the master cylinder, it may have to be bled out on a bench, or using a scanner if that's the way your vehicle is.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.
NOTE: Perform this procedure when replacing the brake pressure modulator valve or electro-hydraulic control unit.
  1. Perform the manual brake bleeding procedure. Refer to Bleeding the Brake System (non-ABS).
  2. Check the master cylinder fluid level often to prevent running the system dry.
  3. Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure (for Gas engines) once, or the Function Test (for Diesel engines) four times. Make sure to release the brake pedal between each test.
  4. Perform the manual bleed procedure again. This should remove the remaining air from the brake system.
  5. Bleed the system as many times as needed to obtain the appropriate feel of the brake pedal.

Dec 18, 2010 | 1997 Chevrolet K1500

3 Answers

I replaced a master cylinder on a 2001 taurus and bench bled the master cylinder before putting it on the car. then bled the 2 lines at the master cylinder and i am getting air out of the front line on...


try disconnecting the front line, have someone else then step on the brake pedal and hold it down while you re-install the line. If that doesn't do it, you probably did get a defective master cylinder.

Mar 07, 2010 | 2001 Ford Taurus

2 Answers

No pedal


Hello;
Did you bleed the master prior to installation? If not you may have a bunch of air trapped in the system. Start at the master and use a pressure bleeder too get the air out. If you have anti-lock you may have to have the dealer purge the system.
Thanks;
Rich
RPM Northwest

Jun 04, 2009 | 2004 Dodge Ram 2500

2 Answers

I need to know how to bleed the brakes on a 1999 chevy blazer


Start from right rear, then, left rear, right front, left front. Fill master cylinder. Have helper sit in car, have helper hold brake pedal down. open bleed screw. fluid and air comes out. close screw. release brake pedal. Continue until no air comes out. Move to next wheel. Keep an eye on master cylinder fluid level after each wheel.

Mar 27, 2009 | 1999 Chevrolet Blazer

2 Answers

Bleeding abs brakes


Try using a pressure bleeder. It will force the air out. Works every time.

Nov 08, 2008 | 2001 Ford Mustang

1 Answer

Unable to bleed front brakes


loosen the front brake line that goes to the master cylinder fill master cylinder up with fluid and bleed it first by attaching a flexible line from master cylinder front brake side submerge that line into jar of brakefluid keeping air from entering line get someone to pump brake pedal while ur holding line in a jar keep refilling the brake resivoir so no air gets in, once the master is bled front brake side then reattach the origional brake line then remove bleed screw from caliper and let fluid gravity flow down to calliper then bleed the normal way. more than likely your master cylinder has air trapped in the front portion good luck

Jul 01, 2008 | 1996 Chevrolet Blazer

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