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i have a 74 longbed with non power brakes. The PO has rigged a return spring to pull the barke pedal back into position and compress the brake light switch. I knew this looked hacked so while at the junk yard today I actually found a dent and it didn't have any spring at all. My question is : Is there supposed to be a spring or is there supposed to be enough pressure from the master cylinder to push back the pedal?
Here is a pic of Rusty because who doesn't like pics!? Thanks in advance, Andy
My truck does not have a spring and I have not seen anything like that from the factory on a dent era vehicle.
The brake system components have their own internal spring. The stop light switch can be adjusted - usually by screwing in or out - so it gets good contact and shuts off correctly. Suggest you remove the spring and try to adjust the brake light switch for correct function.
In reading your description, two things come to mind.
1). the actuator piston in the master cylinder has rust ( brake fluid can absorb water over time )or debris in it ( rust flakes in it from bad fluid in reservoirs )
Time to replace master cylinder and flush system (bleed your brakes !)
2). push rod between pedal and Master cylinder is out of adjustment.
If the pedal and booster brackets are mixed matched they won't fit and you will have a sloppy pedal . Because of the slop the weight of the pedal pushes the brake switch to the on position. The spring pulls the pedal up.
. With that said. If your truck was rebuilt. I would figure out if the pedals are matched.
The clutch pedal has a return spring, but the brake pedal doesn't.
Sounds like the PO was trying to accommodate a brake switch that was not properly adjusted.
I'd pull the spring and adjust the brake light switch.
NO brake pedal return spring. There's a clutch pedal return spring, but that's it.
The brake lamp switch threads into a retainer that has prongs on it to secure it to the bracket on the brake pedal.
Some/all of the prongs break, the retainer is either retained 'catty-wampus' by the remaining prongs, or drops off the pedal taking the switch along with it.
TWO different retainers, TWO different brake lamp switches.
C8TZ-13A629-A Retainer & D2TZ-13480-B Switch = 1968/77 F100/350; 1978 F100/350 & Bronco before serial number CC0,001.
D8TZ-13A629-A Retainer & D8TZ-13480-A Switch = 1978 F100/350 & Bronco from serial number CC0,001; 1979 F100/350 & Bronco.
Wow! Thank you all for the replies. The PO questionably replaced the master cylinder and proportioning valve. I bet the pushrod needs adjusting. This was my first post. It's great to know I have this community as a resource.
Well shoot howdy Rusty, didn't even realize this was your first time
Welcome to FTE
Be sure to join yer local state chapter,
post plenty of pics we here just love look at other folks pick 'um up trucks
start a build thread and don't be to bashful 'bout askin' questions
now be forewarned.. there are some good hearted jokers an jesters and even a few grouchy old farts that will be more then happy to advise, tease and encourage you along the way,
So have fun with your new found mistress and keep the pics coming
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