f100 4x4 disk brake problem
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Joined: Apr 2007
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f100 4x4 disk brake problem
Hello every one new guy here.
Here is my problem i have a 65 f100 4x4 i have coverted to disk brakes. I used a 79 bronco front axel,porportioning valve,master cylinder,and calipers with the stock 65 boster. Every thing is new except for the boster. My brakes will not stay pumped up. There are no leaks but they keep bleading off. they will pump up butt will not stay. I have bled them countless times. tried another new master cylinder. nothing is working. Any help would be greatly appreciated.
Here is my problem i have a 65 f100 4x4 i have coverted to disk brakes. I used a 79 bronco front axel,porportioning valve,master cylinder,and calipers with the stock 65 boster. Every thing is new except for the boster. My brakes will not stay pumped up. There are no leaks but they keep bleading off. they will pump up butt will not stay. I have bled them countless times. tried another new master cylinder. nothing is working. Any help would be greatly appreciated.
Junior User
Joined: Sep 2007
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From: dallas texas
HENRY .509 I would check the rear if your pedal is going down something in the hydralics has to be the cause never seen a boster cause a problem like what your seeing. you could plug of the line to the rear at the master and that will tell you if it front or rear causing the problem.if you see no visible leaks then my guess is something is bypassing porportioning valve or master cylinder seen more than 1 new part be bad.
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65 f100 brake problem
The reason i mentioned the booster is i was thinking yhat the 66 pedal and booster is not compressing the 79 master cylinder enough.
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Junior User
Joined: Sep 2007
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From: dallas texas
maybe but i wouldnt think it would pump up in that case. could jack up front wheel have someone pump it up and hold it if wheel is locked and tnen fades it will be a leak or bypass problem.
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CMF80, could you send me some info on your conversion. I also have a 65 4x4 and I'm not sure about the conversion. I was thinking of changing the front end to coil with radius arms but then again I'm not to sure on what parts to get or just change out the axle and leave the leaf springs???
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cmf80' I sure do!!! Just bought a 65 4x4 and I'm trying to get it ready before I turn in a lease. Would really be so helpfull if you can send me anything you have. E-mail is salvatored3@aol.com. Thanks so much!!!!!
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