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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-05-2017, 05:52 PM   #1
rockyrivermark
Registered User
 
Join Date: Apr 2011
Location: Fairview Park, Ohio
Posts: 1,031
Pics of 71-72 proportioning valve needed

So I'm gone through everything in my braking system and still have some slight dragging up front, only after I've been driving a few min and things are hot.
It's looking like the proportioning valve which giving that truck sat for a few years I'm not surprised.
My truck is a 1970 which originally had 4 wheel drums. Previous owner upgraded 6-5 lug and hence I got front discs. Parts where from a donor 1971 c10.
Here's a pic of my proportioning valve.
Only one line for front and one for rear.
Please post a pic of your proportional valve from a 71 or 72.
I want to make sure I have the right one.
Thanks.
Replaced
Calipers
Calipers hose
Master cylinder
New pentosin super dot 4 fluid
Adjust booster to master rod
Attached Images
 
__________________
My build page
http://67-72chevytrucks.com/vboard/s...d.php?t=764662
My cabinet building site
http://www.cbcabinets.com
rockyrivermark is offline   Reply With Quote
Old 08-05-2017, 05:57 PM   #2
Mr Handy
Registered User
 
Mr Handy's Avatar
 
Join Date: Feb 2013
Location: Spring Hill, Florida
Posts: 465
Re: Pics of 71-72 proportioning valve needed

That is a distribution block for 70 and earlier. It is not a prop valve.
it looks like your master cylinder may also be for drum/drum is one reservoir bigger than the other?
Mr Handy is offline   Reply With Quote
Old 08-05-2017, 06:29 PM   #3
rockyrivermark
Registered User
 
Join Date: Apr 2011
Location: Fairview Park, Ohio
Posts: 1,031
Quote:
Originally Posted by Mr Handy View Post
That is a distribution block for 70 and earlier. It is not a prop valve.
it looks like your master cylinder may also be for drum/drum is one reservoir bigger than the other?
Ok. Thanks for the info. The master cylinder is new and I bought one for a '71 c10.
Back reaivoir is smaller
Posted via Mobile Device
rockyrivermark is offline   Reply With Quote
Old 08-05-2017, 07:01 PM   #4
notsolo
Registered User
 
notsolo's Avatar
 
Join Date: Apr 2008
Location: Md
Posts: 2,482
Re: Pics of 71-72 proportioning valve needed

Here is a photo of a 71...72 is the same.
Attached Images
 
notsolo is offline   Reply With Quote
Old 08-05-2017, 11:36 PM   #5
LockDoc
The Older Generation


 
LockDoc's Avatar
 
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,771
Re: Pics of 71-72 proportioning valve needed

-
If you are searching for one you might try typing in "Combination Valve" instead of "proportioning valve".

LockDoc
__________________
Leon

Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles

(My Dually Pickup Project Thread)

http://67-72chevytrucks.com/vboard/s...d.php?t=829820

-
LockDoc is offline   Reply With Quote
Reply

Bookmarks


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 11:22 AM.


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