Author Topic: No brakes on front end.  (Read 677 times)

Offline 70 RAG TOP

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No brakes on front end.
« on: March 02, 2017 - 08:32:48 PM »
I know it's not a challenger or cuda, but it is a Dodge. I am working on a 1967 W200 power wagon for a friend and need some suggestions. Truck has been sitting for 10 years and I completely replaced all brake components( master cyl. , lines front to back, wheel cylinders, kept brake shoes because they had good amount of lining, and replaced the proportioning valve. I was not able to find prop valve for this truck, so I was told that the prop valve from a "B" body car should be the same. I ordered one and installed it. They  look identical.  The problem is I only can get the rear brakes to work.  If I hold down the pedal, the rear brakes engage, but I have zero brake action on the front.  I have tried 2 master cylinders, have bench bled each, and there are no leaks anywhere.  I still can only get a firm pedal when it is a third of the way from the floor.  I also adjusted the brake shoes  out until they drug slightly on the drums. This truck has drums front and back and the master cylinder does not have a booster. I'm at a loss of what the problem could be. Helppppp please.

Thanks Mike
Mike




Offline jimynick

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Re: No brakes on front end.
« Reply #1 on: March 02, 2017 - 10:44:17 PM »
Do you have any fluid at the frt wheel cylinders when you bleed them? Is there a reason you needed to change the prop valve? Could you swap back in the old one just to see if the new one is the problem? No kinks or squashes anywhere? Frt cylinders free and their pistons moving freely? All plumbed correctly? Master cyl putting out fluid from both ports when bench tested? Just some thoughts.  :wave:

Offline 70 RAG TOP

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Re: No brakes on front end.
« Reply #2 on: March 02, 2017 - 11:19:57 PM »
The old prop valve was junk due to the crud in it from sitting so long. Tried to soak it, but it didn't help.
Yes I get fluid(no air ) when I open the bleeders on the front.  Rear bleeders squirt forcefully, but fronts just flow out with very little force. 
Plumbed the lines same as the old.
No kinks
??
Mike
Mike

Offline brads70

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Re: No brakes on front end.
« Reply #3 on: March 02, 2017 - 11:24:41 PM »
Almost sounds like you have a master for a disc car?
Brad
1970 Challenger 451stroker/4L60 auto OD
Barrie,Ontario,Canada
Proud to own one of the best cars ever made!!!!!

My restoration thread 
http://www.cuda-challenger.com/cc/index.php?topic=59072.0
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Offline Bullitt-

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Re: No brakes on front end.
« Reply #4 on: March 02, 2017 - 11:43:05 PM »
From what I've read the aftermarket proportioning valve are junk(over 50% bad) so my first thought is that's where the issue lies..
Could be a bad Master cylinder ... If dual Master cylinder the best proportioning valve solution is from Wilwood 260-11179

info on install
http://www.cuda-challenger.com/cc/index.php?topic=66387.msg695264#msg695264
Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
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