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BRAKE TROUBLES
#986442
05/05/11 09:50 AM
05/05/11 09:50 AM
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Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED
OP
master
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OP
master
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
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the Road Runner
all new Strange calipers and
bleed system to death no air.even had calipers off opened bleeder pointing up
problem is there's not much pedal.
It has as recommended 1.125 " bore Mopar master on frame rail and it has the correct residuals
If we pinch off any line to the wheel then BINGO we now have full pedal
A: funked up master cylinder
B: stuck residual
C: stuck caliper ( checked out all have some movement)
D: I haven't got a clue
I ELIMINATED MASTER SIZE OR LACK OF VOLUME
home of the
Sox and Martin Hemi Duster
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Re: BRAKE TROUBLES
[Re: HEMIFRED]
#986445
05/05/11 11:21 AM
05/05/11 11:21 AM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Could you explain the entire system - how it's plumbed, dual master?, Assume master is lower than the calipers? using a porportioning valve?
Fastest 300
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Re: BRAKE TROUBLES
[Re: Crizila]
#986446
05/05/11 11:35 AM
05/05/11 11:35 AM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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If you have excess pedal travel, you have excess fluid travel. Ether you are compressing air or the shoes/pads are pulling too far away from their stopping surfaces. Sounds like you eliminated the master as the problem. Are you sure the pedal is coming all the way back to uncover the compinsating ports in the master. Pushrod have some amount free play? Master outlets have check valves ( residual pressure valves ) in the outlets? - manditory if the master is mounted below the calipers / wheel cyls.
Fastest 300
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Re: BRAKE TROUBLES
[Re: Crizila]
#986447
05/05/11 11:38 AM
05/05/11 11:38 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
If you have excess pedal travel, you have excess fluid travel. Ether you are compressing air or the shoes/pads are pulling too far away from their stopping surfaces. Sounds like you eliminated the master as the problem. Are you sure the pedal is coming all the way back to uncover the compinsating ports in the master. Pushrod have some amount free play? Master outlets have check valves ( residual pressure valves ) in the outlets? - manditory if the master is mounted below the calipers / wheel cyls.
If all of the above is checked and OK, then it is air in the system. It's real tough to get it all out in a new system.
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Re: BRAKE TROUBLES
[Re: joshking440]
#986449
05/05/11 03:10 PM
05/05/11 03:10 PM
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Joined: Aug 2010
Posts: 632
Casco, MI
Savoy1964
mopar
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mopar
Joined: Aug 2010
Posts: 632
Casco, MI
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Could the location of front and rear lines be mixed up?
2003 Dodge 3500 Diesel
1964 Plymouth Savoy White 2dr sdn. 512 stroked, Dominator, New Best 9.75 @ 138.50mph
2019 Challenger Scat Pack 1320 White Knuckle-K&N Cold air filter, Billit Oil catch can, drag radials stock 11.911 @ 114mph
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Re: BRAKE TROUBLES
[Re: HEMIFRED]
#986451
05/05/11 03:39 PM
05/05/11 03:39 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Being that Fred is probably using his old man cane to press the brake peddle, he may not have proper leverage on the pedal. 
If needed I have an appendage of my own that I can substitute for a cane
you would be lucky to get past the seat much less reach the flooru 
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Re: BRAKE TROUBLES
[Re: HEMIFRED]
#986453
05/05/11 04:20 PM
05/05/11 04:20 PM
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Joined: Feb 2007
Posts: 6,295
U.S.
moparniac
master
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master
Joined: Feb 2007
Posts: 6,295
U.S.
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Fred I have new strange the whole way around... took quite a few tries at bleeding it to get air out to get a pedal in a whole new system! I used DOT4 I think thats what instructions called for... let it set a few days without touching the car and the pedal feel goes away till I pump them up again... Im gonna try bleeding some more.
Mopar Performance
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Re: BRAKE TROUBLES
[Re: B G Racing]
#986454
05/05/11 04:22 PM
05/05/11 04:22 PM
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Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
HEMIFRED
OP
master
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OP
master
Joined: Jul 2010
Posts: 3,502
SOUTH JERSEY
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although many of the replies here have been tried there are some good suggestions also. I am not working on it but we decided to attack the master cylinder first . bleed it again or just swap it while there
home of the
Sox and Martin Hemi Duster
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Re: BRAKE TROUBLES
[Re: sg66mopar]
#986456
05/05/11 05:55 PM
05/05/11 05:55 PM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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I just had some problems with my brakes. I started with plugging the master cylinder and working my way back till I found the right rear caliper was bad. I put seals in it & checked it from front-back and could not find what the problem was with it. The UPS man will be coming tomorrow.  I guess all I should have said was start at the master cylinder & work you way back blocking off everything till you find the problem. I used 2 cans off Wilwood Hi-Temp 570 not finding the problem before doing it that way. GOOD LUCK!!!
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: BRAKE TROUBLES
[Re: Quicktree]
#986458
05/05/11 06:36 PM
05/05/11 06:36 PM
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Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi
master
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master
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
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Quote:
Quote:
Quote:
Being that Fred is probably using his old man cane to press the brake peddle, he may not have proper leverage on the pedal.
If needed I have an appendage of my own that I can substitute for a cane
you would be lucky to get past the seat much less reach the flooru
and you know this.....how 
Rickster
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Re: BRAKE TROUBLES
[Re: rickstershemi]
#986459
05/05/11 06:47 PM
05/05/11 06:47 PM
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Joined: Mar 2009
Posts: 2,463
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,463
Sydney,Australia
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you could try reverse flushing/bleeding the system.
i have had to do this on a few cars both brakes and clutch hydraulics.
yes it can be messy at the master cylinder
Tex
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: BRAKE TROUBLES
[Re: Crizila]
#986461
05/10/11 09:42 AM
05/10/11 09:42 AM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
top fuel
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top fuel
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
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Mr HEMIFRED, have you found your problem yet? Mine is doing the same thing as yours. We even pressure bleed them,no air in system no pedal. When we get all the air out it feels like it has a pedal,but when you push it down to the floor it goes. New master cylinder,new hard line to the rear,new calipers(all Wilwood). I just replaced the 2 braided steel brake lines to the calipers,will bleed the system again this afternoon. I have been told the braided lines never go bad,but that is the only things I had not replaced yet. I have never run a residual valve on my dragster before,Wilwood says to have brakes I must have one. My understanding of a residual is if you do not have one the fluid can run back to the master cylinder and let the piston retract back into the calipers and you will have to pump the pedal a time or 2 to get the pedal back up. That's not my problem you can pump the pedal all day and they never hold. They are like yours block off any line and they hold.
Hope you have fixed your problem and can tell me the fix.
P.S. I am sure you check this also,with one of the lines unhooked to the caliper when you push the pedal to the floor how much brake fluid come out? Mine looks like about a teaspoon full comes out.
Last edited by MRMOPAR570; 05/10/11 10:19 AM.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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