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View Full Version : Bleeding Brakes.... Whats Wrong?


Squishy
04-13-2005, 04:01 PM
ive got no pressure(well some, but when i start the truck up and it has vaccume, the pedal is super soft for the first 1/2 travel(at least) and does not come all the way back up.

ive bled the brakes for over a hour, gravity, manual bleeding, anything else i should try? i need break pressure, i cant take it out without getting this fixed, im not only endangering myself, but anyone else on the road at that time, and thats not something i want to be responsible for.

could it be the master cylinder? the brake booster?

I have no experience with brakes(other than changing disc brakes and calipers, but i can not set up rear brakes or anything) so any help is appreciated.


Thanks, Kris[cheers]

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

In The Zone
04-13-2005, 04:13 PM
Kris what did u do to acheive no hydraulic pressure?

check your poportioning valve to see if it is activated.
should not be sticking ouot mmore on one side

ususally below the master


get some one to pump and feel each line perferably the flex portion u should be able to feel some movment or stiffining withhydraulic pressure

if not i would say your master is toast.


97 FORD SAS Histeer
8" suspension lift
HD D44 HD D60 5:13
36" swampers locked and chiped ready to play almost......

Squishy
04-13-2005, 04:18 PM
quote:Originally posted by In The Zone

Kris what did u do to acheive no hydraulic pressure?

check your poportioning valve to see if it is activated.
should not be sticking ouot mmore on one side

ususally below the master


get some one to pump and feel each line perferably the flex portion u should be able to feel some movment or stiffining withhydraulic pressure

if not i would say your master is toast.


97 FORD SAS Histeer
8" suspension lift
HD D44 HD D60 5:13
36" swampers locked and chiped ready to play almost......



could you explain that? the brakes do work, slightly, i will let the clutch out with the brakes on, and it will hold the truck a bit, but wont stop it completely, but i wouldnt expect them to in low low low(back end lifts up and rear tires start to turn with the front not moving yet)

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

sj-x 500
04-13-2005, 04:19 PM
it's a master
no q's about it.


Zuk's on Ice.

Squishy
04-13-2005, 04:22 PM
ok, anyone know if there is a direct bolt in master that will be better than the one i have? like out of a fullsize or something?

Thanks

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

boyzen
04-13-2005, 07:27 PM
did you adjust the rear brakes ,does the e brake work?


money costs too much!!!

jeeper
04-13-2005, 07:39 PM
Like boyzen mentioned


If your rears arent in adjustment you will loose a lot of your peddle just pushing them out ! MAke sure that your rear adjusters havent seized and go from there !








Strip mining prevents forest fires.

Rhys
04-13-2005, 09:38 PM
Make sure that you put the front calipers back on correctly too, Bleeder screw should be at the top... dont ask how I know. If they are on upside down you might have air stuck in the brake cylinder.

Rhys

Squishy
04-14-2005, 01:12 AM
the brakes are on correctly, i guess ill take the back brakes aprt and inspect them

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

phatmatt
04-14-2005, 06:18 AM
Check for any dampness around the master that will also let you know if it is going.

gordwould
04-14-2005, 09:26 AM
hey kris apply e-brake then check the peddel and see if there is any difference ?
if so rear brakes are either out of adjustment or preportioning valve is screwed.

http://www.funinbc.com/forum/uploaded/cracmasterg/2004113015120_Rollup.jpg

hornythrony
04-19-2005, 10:33 PM
hey kris i dont know if anyone said this (but i was to lazy to read;)) but check you calipers make sure there on the right sides and make the the bleeder nipple is higher then the input line[8D] buddy of mine tried to bleed his brakes for a week at school when he had class and it never came to wear it was suppost to as soon as he started it it went soft (hehe ;) shh i did say that) but i went to his class and look at it switch the cal's to were they belonged and whala it worked

its a fullsize thing! jeep owners just wont understand:P

Squishy
04-19-2005, 10:50 PM
hornythorny, going out side this minuite to check.

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Squishy
04-19-2005, 10:54 PM
nope, thats not it, if my neck/back were in better shape, id pull the rear wheels off and check the brakes, i have a feeling that may be part of the problem because when i was pumping the brakes, the back would make a kind of clank, i dont know how to describe it, but that could be part of it.

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

hornythrony
04-20-2005, 10:20 PM
ha i wounder if your brakes and drums are worn so bad and the adjust screw wasent working the the cylinder pistin pinched the seals and leak out is there any wetness in the rear drums?

its a fullsize thing! jeep owners just wont understand:P

jnyblazer_69
04-20-2005, 10:46 PM
the sound you here is prob the backing plate nubs catching,soon as you let go you hear click!,and did you cange your pinion angle....?
air stay's at highest point...$0.02

"all be sober in the morning,but you will be ugley for the rest of your life

Squishy
04-21-2005, 01:14 AM
pinion angle is changed, dont know if its wet in the drums, need to pull off and inspect. the BRAKE light on the dash comes on when i press the brakes, and sometimes turns off, i dont know whats up with that. Maybe i should pinch the rear brake line(vise grips on the rubber hose) and see what that does with the break pedal and everything, that should tell me if its to do with the rear brakes!

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Squishy
04-21-2005, 01:15 AM
now why didnt i think of that earlier?

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Rebulon Refurbulater
04-24-2005, 06:38 AM
Take the drums off....first. Look for leaking wheel cyl too.....The master could also be fucked....If the maser is old and your bleeding your brakes dont cycle the pedal past about half way because the cups on the spool will have worn their own path of movement. If you pass that you will likely cause an internal leak in the master requireing a rebuild hone or replacement.....check fluid level.......did your master go dry while bleeding?....maybe it needs to be "bench bled" you dont actually have to remove it just remove the lines ...fill the reservoir...put your finfers over the ports....have someone cycle the pedal slowly......let air and fluid out but make sure nothing gets back in......plug one port...very quickly put one line on....then the other....bleed brakes.....make sure master cyl stays "wet".....good luck!

Wheelin', Workin',........oh yeah....Sex!

Squishy
04-24-2005, 09:07 AM
Rebulon Refurbulater, thanks for the info, ill have to try that

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Squishy
04-25-2005, 04:46 PM
ok, today i clamped off the back brakes, and everything feels fine..... what could it be...... going to try to pull the drums off tomorrow and inspect(im glad it wasnt the master)

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

In The Zone
04-25-2005, 04:57 PM
you could still have a master problem

if it was a wheel cylinder u would see obvious signd of fluid leakage with the amount of fluid u have gone through...

how is your park brake adjusment?

if it is way out could be your shoes are not adjusted right


should clear your drum with very slight drag

is a good starting point then seat em and adjust from there.




primary and secondary...

your primary builds pressure for the front and the secondary for the rear

i could be wrong but if either seal is #$%# then ur pressure will not be good

does it hold pedal pessure or slowly sink?





HMMMMMMM
ITS a FORD

Squishy
04-25-2005, 05:15 PM
holds pressure if the rears are clamped off, parking brake? i dont need no stinkin parkin brake(soon to have) ill pull the drums then and adjust them

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

Rebulon Refurbulater
04-26-2005, 04:28 PM
you adjust the rear brakes with the drums on.....but remove to inspect....good luck!

Wheelin', Workin',........oh yeah....Sex!

Squishy
04-26-2005, 05:17 PM
adjust with the drums on? how so?

__________________________
1984 Bronco II, 302, NP435,NP208 Doubler, NP205,5.13 Dana 44/8.8 Fullwidth, Detroit, Coil Front, 36" Militarys
LOCKED AND LOADED!

Shenanigans!

In The Zone
04-28-2005, 03:58 AM
star wheel on the lower back of drum is a slot for acsess
u can use a special tool
or do what most due and use aflat head screwdriver;)

easier to adjust when every thing is clean and works.




ie PB
[36]

HMMMMMMM
ITS a FORD

Rebulon Refurbulater
04-30-2005, 08:22 PM
yeah ...you can bend the screw driver at about 30 degrees or so to make it easier......jack the rear wheels off the ground so you can adjust untill you feel a very slight drag.....equal on both sides...

Wheelin', Workin',........oh yeah....Sex!