rear brakes stick

[gene crumpton]

my brakes continue to drag or stick. i have replaced every rhing
including springs on rear drums. have replaced hose to wheel, replaced master cylinder. continues to drag. new drum one wheel, seems to build up pressure not enough to lock down. any suggestions will be appreciated

[JDPascal]

To answer your questions, I need some more information to clarify the situation.

are the front brakes dragging or the rear?

Which brake hose did you replace? where is it located?

It seems like you have worked on the rear brakes. Did you replace the wheel cylinders??

Are the park brake cables still attached?

Both of these can keep the back brakes partially applied if they are seized.

There can be a problem caused by incorrect master cylinder instalation but it seems that the problem existed before you changed it, is that right???

If you will reply to the 5 questions, it will help to track this down for you.

JD

[gene crumpton]

Originally Posted by gene crumpton

my brakes continue to drag or stick. i have replaced every thing
including springs on rear drums. have replaced hose to wheel, replaced master cylinder. continues to drag. new drum one wheel, seems to build up pressure not enough to lock down. any suggestions will be appreciated

good morning JDPascal. answer 1. rear brakes dragging.
2 . replaced rubber hose from frame to rear wheel. 3.
replaced everything including springs 4.
park brake cable are attached, but seem to be realeased
5. replaced master cylinder, problem was already there
to more clarify. the morning start out fine, as day goes own they seem to build up pressure. they never lock down. have replaced shoes turned drums,new wheel cylinders,new springs,only thing not replaced, i
think is called terminal block.
thanks
gene crumpton

























jd










pascal

[gene crumpton]

good morning mr pascal?

answer to your questions

1. rear brakes seem to drag

2. rubber hose from rear terminal on frame to wheel

3.replace every thing back two wheels including springs

4.park cables are attached. seem to be releasing

5master cylinder replaced, problem existed prior to

6. to clarify things. morning seem to be fine when first start day
as day progreees seem to build up, but never locks up, just
starts to drag, as if i had foot on brake pedal. fact is can make same noise with pressure slightly on pedal.
thanks
gene
























jd










pascal[/quote]

[JDPascal]

NO I didn’t forget you Gene. I’ve just been cogitatin’ on the situation for a bit.

A few more questions are on my mind now.

------How much freeplay do you have at the brake pedal?
There should be 1-2 inches of pedal movement before the master cylinder is moved.

------Was any work done on the brakes prior to the problem starting before you replaced all the parts?

------How far do you drive before you notice the dragging brakes?

------Do the brakes return to normal if the Jeep sits for awhile or overnight?

------If not, what do you need to do to make them quit dragging?

Only two things that come to mind that lead to draggy brakes when all the parts are new like yours, are a blocked compensating port in the master cylinder or the power brake booster binding internally.

Both of these could allow the brakes to release after the vehicle sits for awhile.

------Did you replace the self-adjuster lever, cable and spring??

If the adjuster cable is stretched, that will allow over adjustment of the shoes – probably only on one side but possibly both. You would need to re-adjust the brakes to release them though.

------When you installed the shoes, did you install the shoe with the longest lining in the rear position on both backing plates??
I haven’t seen this cause your specific problem but there is always a first.

Sorry I can’t solve the problem without more questions.

Later

JD

[gene crumpton]

Originally Posted by gene crumpton

good morning mr pascal?

answer to your questions

1. rear brakes seem to drag

2. rubber hose from rear terminal on frame to wheel

3.replace every thing back two wheels including springs

4.park cables are attached. seem to be releasing

5master cylinder replaced, problem existed prior to

6. to clarify things. morning seem to be fine when first start day
as day progreees seem to build up, but never locks up, just
starts to drag, as if i had foot on brake pedal. fact is can make same noise with pressure slightly on pedal.
thanks
gene
























jd










pascal

[/quote]

[gene crumpton]

just got last mess 9/11 been out town1- free play 1-2 inches

no work done prior to.starts dragging mile or so. returns to nmormal

some times right away, some times later. as to port master cylinder

new master cylinder not rebuilt. do you know how i would check

power brake booster. at time took off master cylinder, heard air release

from power booster, like pressure realease, should there be any

type vacuum there?. did not replaceself adjuster looked fine.

power booster sounds more likely problem. how would i check

thanks
gc

[JDPascal]

To check the booster for binding when you notice the brakes dragging, shut the engine off and while someone carefully watches the brake pedal, someone else should remove the vacuum fitting from the booster. Watch for slight upward movement of the pedal. If you see movement, the valve actuator in the booster is binding.

The "air" you heard was the air replaceing the stored vacuum.

The fitting you need to remove to check for binding has a check valve in it to hold vacuum for reserve brake applications if the engine quits while the vehicle is moving - so yes - there is vacuum in the booster when the engine is shut off, or there should be.

Binding in the booster is not a common problem but sounds like a possibility in this case.

JD

JD

[vividd]

My 89 jeep REAR brakes were sticking...... it turned out the backing plates had worn down and the worn spots would not let the brake shoes return , and they would drag ........... you can rip rear brakes apart and replace the backing plates ....

[Saudade]

I'd concur that the backing plates need to be checked. The shoes can wear down the plates in spots where they make contact. Use some emery paper and smooth out any bumps or grooves. Make sure you use a bit of high temp grease on the adjusters and any contact points. Don't get any on thes drum or shoes.

[tgrudzin]

[quote=Saudade]...I'd concur that the backing plates need to be checked. Make sure you use a bit of high temp grease on the adjusters and any contact points...

I have used 'anti-freeze or no-lock" compound. Is this OK?

Ted

[jeeper61]

anti-sieze lube works well. only reason to use any grease there is the prevent noise as the shoes nibs move on the pads. grease collects dirt - dirt increases wear - but no noise is what the driver wants. Wear ususally isn't a problem till HIGH mileage.

use a little emery cloth or a small mill file to smooth the pads off before you install the shoes.