need break help
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New User
Joined: Nov 2005
Posts: 16
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From: Lexington NC,HighrockLake
need break help
i bought a 73 f100 302 it has man. breaks it has been sitting since about 1996 im going through the breaks i had to keep pumping the breaks and still dont have good breaks so i replaced the mc and it got worse so i returned the mc and got another one its still doing the same i have to pump the breaks about 10-15 times to stop so i blew the lines out took the prop valve off took apart cleaned still no fluid to back wheels and still no breaks so i got another prop valve still same thing any help will be great
Mountain Pass
Joined: May 2009
Posts: 232
Likes: 1
From: 40min from Charlotte NPD.
Only thing that comes to mind is a pin hole in the line, or your flex lines have a lot of stretch in them. How old are the flexible lines that run to the calipers on the front breaks? Did you say no fluid is getting to the back wheels even with a new prop valve?
Freshman User
Joined: Dec 2008
Posts: 30
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From: Casa Grande, AZ
I have the same exact problem and its been eating at me for a while. I have replaced just about everything in the BRAKE system including blowing out all the lines as well as a few new ones. I also have tried different brake valves and I still can't get brake fluid to the rear wheels for the life of me!
Senior User
Joined: May 2009
Posts: 228
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From: North Carolina
are the front brakes working? i dont mean to be rude but its getting on my nerves, its spelled brake not break.
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Freshman User
Joined: Dec 2008
Posts: 30
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From: Casa Grande, AZ
I hate to steal troubles thread, but on mine I can get fluid to the front just fine. (I know, thats why I spelled brake in all caps earlier 
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Adjust your rear drum brakes. If they are really slack then it's going to take quite a few pumps to take up the slack. Even an 1/8" gap can take a bit to make them work.
Adjust the drums so there is a slight drag.
Josh
Adjust the drums so there is a slight drag.
Josh
Postmaster
Joined: Dec 2008
Posts: 3,940
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From: Southern Oregon Coast
I seem to recall reading somewhere where someone had taken a extra fluid reservoir cap and fitted it with an air fitting so a tire pump could be attached to it - he then used the tire pump to "pressure bleed" the brakes from the reservoir down. Once done, he put the original reservoir cap back on. I've done something similar with the hydraulic clutch on a Saab 900 which worked beautifully and didn't require modifying the reservoir - just needed a bicycle innertube and a hose clamp...
Senior User
Joined: May 2009
Posts: 228
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From: North Carolina
I seem to recall reading somewhere where someone had taken a extra fluid reservoir cap and fitted it with an air fitting so a tire pump could be attached to it - he then used the tire pump to "pressure bleed" the brakes from the reservoir down. Once done, he put the original reservoir cap back on. I've done something similar with the hydraulic clutch on a Saab 900 which worked beautifully and didn't require modifying the reservoir - just needed a bicycle innertube and a hose clamp...
Cargo Master
Joined: Dec 2006
Posts: 2,511
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From: hinckley ohio
when you put the m/c on it should slide back againest the booster( i am assumeing there power brakes)if it doesn't you will need to adjust the push rod to make it shorter.if it is preloaded it will push the plunger in the m/c and rear brakes would be effected.
Posting Guru
Joined: Nov 2008
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From: Halifx Pa
THANK YOU FOR MENTIONING THAT! I don't mean to be rude either, but it was driving me nuts to read it that way, and good luck with your brake issue!!