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Soft brake pedal after replacing shoes,drums,wheel cylinders,brake lines,caliper,master cylinder and bleeding

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  • Chevrolet Master
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YOU STILL HAVE AIR IN BRAKE SYSTEM REBLEED BRAKE SYSTEM.

Posted on Nov 15, 2009

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I have a 23 t bucket and i cant get a brake pedal.when i bought it had very little brake so i replaced rear shoes and cylinders,front pads and calipers,all new lines and the master cylinder


Once you have bled the air from the brake lines,clamp off the front brake hoses carefully.Does the pedal feel better now?
Then the pad /caliper fit is allowing too much play.Is the pedal the same?Then clamp the rear hose and try the pedal.Is it fine with the rear hose clamped?If so we now know the problem is at the rear brakes.One common low pedal rear brake cause is brake shoes that do not fit the drums.Remove the drums and look at the shoes,are they showing contact wear fully or just in the middle of the shoe?Remove a shoe and place it in the drum.Can you rock the shoe against the drum surface?Once drums have been resurfaced,the shoes will not fit fully against the drum allowing the shoe the flex when applying pressure to it and this can easily create a low soft brake pedal. Of course rear brake adjustment must be correct once brake shoe contact is correct.To correct brake shoe contact,have your shoes re arc-ed to fit resurfaced drums or install new drums.Don't overlook brake master cyl /brake pedal push rod adjustment too.

Jun 24, 2017 | Cars & Trucks

3 Answers

What is the part called that the brake lines hook into?


Hi,
Under the hood is the Master Cylinder. It contains brake fluid, which when you depress the brake pedal, acts as hydraulic fluid to flow through high pressure tubing called brake lines, from the Master Cylinder to the Wheel Cylinder (drum brakes) or Brake Piston Caliper (disc brakes). As you depress the pedal further hydraulic pressure expands the wheel cylinder which presses outward, 2 brake shoes inside a metal "drum" (drum brakes) or clamp the brake piston calipers together squeezing a disc-like rotor (disc brakes) thus stopping the vehicle.

Sep 26, 2013 | 1998 Chevrolet Lumina

1 Answer

Toyota surf brake problem


If you replace the wheel cylinders or brake calipers and did not bleed them properly, you most likely have air in the lines, If the rear brakes are drum brakes they need to be adjusted (if taken apart or new parts put on) or the pedal may sink when pressed.
1. If the brake pedal is soft when pressed down, the brake lines have air in them and need bleeding to remove the air.
2. a soft brake pedal can also be a bad master cylinder. Replace the master cylinder if the lines have been bleed correctly but the pedal is still soft or sinking when the pedal is pressed.

Dec 08, 2012 | Cars & Trucks

2 Answers

97 saturn brake problems. Replaced master cylinder, both front calipers and rotors. Replaced both rear wheel cilinders shoes and drums. Also replaced all rubber brake lines yet no pedal after bleeding....


Get another master cylinder,If you want to really find out if the master cylinder is goo open one of the lines have someone pump the brake,with your finger over the open cylinder line you will have pressure coming out, and if you feel vacuum has your assistant releases the pedal that a sure sign the master cylinder is not working,Also when you have a master cylinder before you install you need to bench bleed it

Nov 28, 2012 | Cars & Trucks

2 Answers

I replaced front and back brakes on my 1996 1500 Chev Suburban. Bled the brakes starting at the farthest line. The pedal is soft and travels too far. Does not seem to stop very good. What is the...


it sounds like there is still air in the brake system that has not been removed.you don`t say if you replaced the brake pads and shoes(in which case you shouldn`t need to bleed)or you replaced a brake line(s) or wheel cylinder or caliper.you will have to keep bleeding the brakes all 4 wheels(trucks don`t use bi-directional braking meaning right rear brakes with left front and so on).bleed both rear brakes then bleed both front brakes,was this problem there before you replaced the brakes(soft pedal noticed) and this is why you changed the brakes or the pedal was soft and the brakes needed changing.its possible that the master cylinder has an internal leak and may need replacing.

Apr 06, 2011 | Chevrolet Suburban 1500 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

3 Answers

My brake pedal goes to the floor?(spongy brake pedal) i added brake fluid and still have the problem.Do i need to bleed the brakes and if so whats the easiest way?


If you needed to add a substantial amount of fluid, good chance that something is leaking. You will not regain full pedal 'till that's repaired. Leak could be from a line, caliper or wheel cylinder. The master cylinder can also leak from the rear (check for a wet spot where it's bolted on)
If you did not need to add much, it's also possible that the master is internally bypassing and needs to be replaced.
Bleeding needs to be done after any hydraulic repair. Basic bleeding can be done by opening the r/r valve on the caliper or wheel cylinder and having someone hold the pedal down, then closing it as many times as necessary to get the air out, then doing l/r, r/f and l/f the same way.
Some ABS systems require special procedures so check haynes or chilton manual to see if anything extra is necessary. While bleeding, frequently check the fluid level...if it runs dry you need to begin all over again. Master cylinders should be pre-bled, then re-bled before bleeding remainder of the system (instructions should come with the part.)

Feb 02, 2011 | 1993 Nissan Pathfinder

4 Answers

Brake pedal is mushy all the way to the floor. Have already replaced front calipers, master cylinder, and bled all the brakes. Pedal still goes all the way to the floor when stopping the car.


If the car has drum brakes in the rear, Jack the rear up and have someone push the brake pedal hard and you try to turn the wheel. If you can turn it you need to adjust the rear shoes. They may be traveling out so far that the fluid level drops causing the pedal to go to the floor. You must adjust them with the drum on till you hear and feel the shoes rubbing against the drum. Hope this helps.

Dec 30, 2010 | Honda Accord Cars & Trucks

1 Answer

Brake pedal goes too far to the floor on initial application, pumping brings the pedal up, bled several times


Sounds like an internal leak in the master cylinder, an external brake fluid leak (such as a leaking brake line), or extreme misadjustment or binding of the calipers or drums. Any could be the case, and you can eliminate the last 2 rather easily. Do you see any sign of fluid coming from any of the brake lines? If not, move to adjustments. Check the calipers for bound up caliper pins and if equiped with rear drum brakes, the adjustment and condition of the rear shoes. After that, go right for the throat and replace the master cylinder. Be sure to bench bleed it before you install it, and if you have ABS, make sure you also bleed the ABS system, OR if you can't bleed the ABS system have the new master cylinder ready to install, and remove the brake lines as quickly as possible from the old master and have a friend hold thier fingers over the ends of the lines. I do this quite a bit at my shop, and it's VERY rare that I actualy need to bleed the ABS after replacing a master cylinder if little to no air gets in the brake lines.

Dec 10, 2009 | 2000 Subaru Outback

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