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 08-10-2003, 01:08 PM   #1
Growdon
Registered User
 
Join Date: Dec 2002
Location: Northern California
Posts: 53
proportioning valve reset?

I lost a rear axle seal and it soaked my rear brakes on one side. The proportioning valve slipped and will only supply pressure to the rear brakes. I have replaced all the needed parts and now can't figure out how to reset the proportioning valve.

Any help would be appreciated.

Thanks,
Dean
__________________
72 K5 CST 350/350. 4 wheel disks, 4" lift soft top. ###Sold

71 GMC Custom K2500, 3/4 ton 4x4. 350/350 ## Just bought, New Project
Growdon is offline   Reply With Quote
Old 08-10-2003, 01:22 PM   #2
7T1BURB
Registered User
 
Join Date: Aug 2002
Location: Newport News, VA
Posts: 190
Proportioning Valve reset...

..is correctly done by ensuring the "pin" (located in the front of the PV) is to the rear (IN). Either by "special tool" (I made one out of an "L" shaped braket and bolted it to the PV mounting bolts or there is a real Chevrolet "Special Tool" from long ago) or clamped with big C Clamp...once the pin is secured to the rear (IN) proceed with brake bleeding process as normal...it may/usually take a few times to do the system due to air within the system. Another method is to literally "stomp" on the brake pedal and this will sometimes "center" the valve....either way should work. Ensure that you first "bench bleed" the Master Cylinder or all is for naught. Be patient...bleeding brakes is a process not rushed....hope this helps.....7T1BURB
7T1BURB is offline   Reply With Quote
Old 08-10-2003, 03:54 PM   #3
Growdon
Registered User
 
Join Date: Dec 2002
Location: Northern California
Posts: 53
Thanks for the help, I will try it tonight
__________________
72 K5 CST 350/350. 4 wheel disks, 4" lift soft top. ###Sold

71 GMC Custom K2500, 3/4 ton 4x4. 350/350 ## Just bought, New Project
Growdon 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 05:06 PM.


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