Disc brakes help
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Elder User
Joined: Jul 2001
Posts: 602
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From: Huntersville
Disc brakes help
I converted my 71 f100 to disc brakes off a 75 following tech article (very helpfull). I have new rotors. pads. hoses, calipers. Using proportion valve off 75. The problem is the brakes are dragging. With the front jacked up I can turn wheel with a good bit of resistance, if I push brake pedal and release then I can barely turn wheel at all. If I let it sit alittle while the wheel turns easier again. I've adjusted pedal travel to insure it has free play and bleed brake lines. I can tell it's dragging by driving it in the driveway. I did'nt get it on the road for fear of heating the rotors too much. Do I have a bad proportion valve? Any suggestions appreciated.
Clint
Clint
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Joined: Jan 2008
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Disc brakes help
[updated:LAST EDITED ON 10-Mar-02 AT 07:56 PM (EST)]Used Calipers?
I'd say they are slightly corroded and not allowing proper return of the pistons.
I forget how much the turning of the rotors causes the piston to move back in its casing.
Master cylinder & back pressure?
Dennis https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=1733&.jpg
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78 F-150 429CJ,Silver, Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon
I'd say they are slightly corroded and not allowing proper return of the pistons.
I forget how much the turning of the rotors causes the piston to move back in its casing.
Master cylinder & back pressure?
Dennis https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=1733&.jpg
[font color=blue]Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [font/]
78 F-150 429CJ,Silver, Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Disc brakes help
Clint turn the rod on the booster in a couple of rounds. That should do it. 
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John
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In the cool still quiet of night, you can hear chevies rusting away.
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John
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[link:www.ford-trucks.com/users/jowilker|My Club FTE Page] Member since 01 01
[link:www.ford-trucks.net/users/jowilker/NCFTE.html|NCFTO] North Carolina Ford Truck Owners Group
In the cool still quiet of night, you can hear chevies rusting away.
