The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-13-2015, 02:01 PM   #1
tubbed55
Registered User
 
tubbed55's Avatar
 
Join Date: Aug 2006
Location: Houston, TX
Posts: 98
original brake pedal spring

does anyone know which one of these springs if any is the original brake pedal spring. Thanks
Attached Images
 
tubbed55 is offline   Reply With Quote
Old 03-13-2015, 02:18 PM   #2
dwcsr
Hollister Road Co.
 
dwcsr's Avatar
 
Join Date: Apr 2005
Location: Houston
Posts: 6,131
Re: original brake pedal spring

The longer one
dwcsr is offline   Reply With Quote
Old 03-13-2015, 02:36 PM   #3
Russell Ashley
Registered User
 
Russell Ashley's Avatar
 
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,648
Re: original brake pedal spring

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.
Russell Ashley is offline   Reply With Quote
Old 03-13-2015, 02:51 PM   #4
tubbed55
Registered User
 
tubbed55's Avatar
 
Join Date: Aug 2006
Location: Houston, TX
Posts: 98
Re: original brake pedal spring

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 is offline   Reply With Quote
Old 03-13-2015, 05:36 PM   #5
tubbed55
Registered User
 
tubbed55's Avatar
 
Join Date: Aug 2006
Location: Houston, TX
Posts: 98
Re: original brake pedal spring

Fixed it.....made a metal stop that bolts to the bracket to keep pedal off firewall.
tubbed55 is offline   Reply With Quote
Old 03-13-2015, 06:21 PM   #6
Russell Ashley
Registered User
 
Russell Ashley's Avatar
 
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,648
Re: original brake pedal spring

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.
Russell Ashley is offline   Reply With Quote
Old 03-13-2015, 06:49 PM   #7
tubbed55
Registered User
 
tubbed55's Avatar
 
Join Date: Aug 2006
Location: Houston, TX
Posts: 98
Re: original brake pedal spring

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.
tubbed55 is offline   Reply With Quote
Old 03-13-2015, 06:50 PM   #8
OrrieG
Registered User
 
OrrieG's Avatar
 
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
Re: original brake pedal spring

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.
__________________
1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread
1964 Chevelle Malibu w/ 355-350TH (daily driver)
Helpful AD and TF Manual Site Old Car Manual Project
OrrieG is offline   Reply With Quote
Old 03-14-2015, 01:07 PM   #9
_Ogre
Registered User
 
_Ogre's Avatar
 
Join Date: Jan 2012
Location: Motown
Posts: 7,680
Re: original brake pedal spring

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
__________________
cool, an ogre smiley Ogre's 58 Truk build

how to put your truck year and build thread into your signature
shop air compressor timer
_Ogre is offline   Reply With Quote
Old 03-14-2015, 02:43 PM   #10
OrrieG
Registered User
 
OrrieG's Avatar
 
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
Re: original brake pedal spring

From 76-2000 as a 7K miles a yearDD I replaced mine once and the replacement still works.
__________________
1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread
1964 Chevelle Malibu w/ 355-350TH (daily driver)
Helpful AD and TF Manual Site Old Car Manual Project
OrrieG is offline   Reply With Quote
Old 03-14-2015, 04:51 PM   #11
Russell Ashley
Registered User
 
Russell Ashley's Avatar
 
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,648
Re: original brake pedal spring

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.
Russell Ashley is offline   Reply With Quote
Old 03-14-2015, 06:54 PM   #12
tubbed55
Registered User
 
tubbed55's Avatar
 
Join Date: Aug 2006
Location: Houston, TX
Posts: 98
Re: original brake pedal spring

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...
tubbed55 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:26 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com