original brake pedal spring

[tubbed55]

does anyone know which one of these springs if any is the original brake pedal spring. Thanks

[dwcsr]

The longer one

[Russell Ashley]

The larger one is the brake spring, used along with the rod. On my 57 the spring hooks to the top of the pedal above the pivot, the rod hooks to the spring, and the other end of the rod hooks into a hole in the top of the frame rail. The smaller spring might be the clutch return spring.

BTW, The FAM does not show the rod, it shows the brake spring hooked to the rear of the mc mounting bracket, but my 57 had the rod, and there was a hole in the frame in the correct place, so it seemed right to me.

[tubbed55]

Ok thanks, I bought the dual master cylinder bracket used with original pedal. With spring on, the pedal stops when it hits firewall. The original master cylinder rod has a stop to stop pedal travel. Is just the way it's going to be or am I missing something?

[tubbed55]

Fixed it.....made a metal stop that bolts to the bracket to keep pedal off firewall.

[Russell Ashley]

If you are using the original brake light switch check to make sure the pedal comes up far enough to turn off the brake lights. If my pedal doesn't come up all the way to the floor my brake lights stay on.

[tubbed55]

I'm running all new brake lines and going to use a inline pressure brake switch. Just wasn't crazy about the pedal hitting the newly painted firewall. with the stop it gave me approx 1/2" clearance. I made it slotted also in case it needs to be adjusted.

[OrrieG]

Also make sure you have the rubber donut around the pedal shaft between the pivot arm and firewall to keep from destroying the firewall mounted brake switch.

[_Ogre]

on thing to consider:
those inline brake light switches don't seem to have a good life span
on the other hand... the brake switch in my 58 is the original
and like orrieg states; a proper install the switch does not hit the firewall

if the inline switch fails you'll need to bleed all the brakes
floor board switch failure... 2 screws and 2 plug in wires

[OrrieG]

From 76-2000 as a 7K miles a yearDD I replaced mine once and the replacement still works.

[Russell Ashley]

Don't mean to drag this thread out or change direction, but according to the FAM the pedal should never hit the floor. The pin in the original mc pushrod has and eccentric shoulder on it and you turn it until the pedal is .68 inches from the floor where the pedal rod comes through. Section 5, sheet 12 of the FAM shows this. I tried to copy it but because of the binding I couldn't lay it flat enough to get the instructions that explain this.

[tubbed55]

That was my point the original m/c has a stop. A dual m/c does not have this stop and does not keep the pedal from hitting the firewall. I got it working with the stop I made. To late for the original switch...firewall was all welded up smooth and painted. Try my luck with the online switch. Thanks for all the help...