69 3/4 ton power drum brakes pro valve pic request - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*rage'nrat638* · 01-28-2007, 12:29 PM

hey guy's i am going to be installing the correct booster on my truck..

some one along the line changed mine to a 1/2 ton model.

i need a picture of the pro valve and line connections of a 69 c20 so i can do this right one time..

here's a few pictures...i will be installing a Bendix (cardone) REBUILT BOOSTER

i have got the correct brackets after many moon's of searching..

the 1/2 ton booster has a longer shaft sticking out the back than the 3/4 ton does. i just want to see the line connections and provalve used.

THIS WILL CONVERT from a single diaphragm to a double diaphragm

1969 C-20 POWER DRUM BRAKES PRO VALVE PICTURE REQUEST

THANKS IN ADVANCE

*rage'nrat638* · 01-28-2007, 03:52 PM

ttt

GMCBubba · 01-28-2007, 04:30 PM

not sure if this helps or not. i actually just changed out the master cylinder today. no power, though.

*rage'nrat638* · 01-29-2007, 08:47 PM

to the top. TTT
PLEASE anybody?

**john** · 01-29-2007, 09:06 PM

I dont think there is any diff between power and non power. That block basicly splits the front and rear and houses the warning light switch. The four wheel drum brakes do not use a proportioning valve. I think thats how it works. Even the disc trucks use the same prop valve between 1/2 and 3/4 ton. They are just plumbed different. If yours looks like GMCBubba you should be good to go.

meathead95 · 01-30-2007, 04:54 PM

my 70 k20 has a prop valve and so does my 66 mustang so yes drum/drum systems do need a valve. the one in gmcbubba's photo looks just like the one on my 1970 k20

Bob Moore · 01-30-2007, 08:53 PM

Marc - what specifically do you want to see?

*rage'nrat638* · 01-30-2007, 09:59 PM

Quote:

Originally Posted by Bob Moore

Marc - what specifically do you want to see?

the valve and the way the lines are hooked up.

i ordered the booster last friday should be here soon, i just want to be ready.

i am hoping i don't have to swap lines from front to rear on the master cyl.

pierce · 01-30-2007, 11:12 PM

rage'nrat638
Here's a couple pics from my 69 3500 it's got factory pwr brakes and 4 drums. These were shot in the fffffreezing dark of night, good thing the flash worked. see if this works...

*rage'nrat638* · 01-30-2007, 11:20 PM

thanks man..thats the stuff..from the looks of it..i think my master cyl will work i just need to change the booster

thanks everyone!!! and of course i will save the pictures for future use

GMCBubba · 02-03-2007, 05:09 PM

what is that you have installed just south of the proportioning block in the brake line?

looks like a nice, easy swap. will it be that easy to just add power brakes to my manual set-up?

01-28-2007, 12:29 PM	#1
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	69 3/4 ton power drum brakes pro valve pic request hey guy's i am going to be installing the correct booster on my truck.. some one along the line changed mine to a 1/2 ton model. i need a picture of the pro valve and line connections of a 69 c20 so i can do this right one time.. here's a few pictures...i will be installing a Bendix (cardone) REBUILT BOOSTER i have got the correct brackets after many moon's of searching.. the 1/2 ton booster has a longer shaft sticking out the back than the 3/4 ton does. i just want to see the line connections and provalve used. THIS WILL CONVERT from a single diaphragm to a double diaphragm 1969 C-20 POWER DRUM BRAKES PRO VALVE PICTURE REQUEST THANKS IN ADVANCE Last edited by rage'nrat638; 07-12-2007 at 06:58 AM.

01-28-2007, 03:52 PM	#2
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: 69 3/4 ton power drum brakes pro valve pic request ttt

01-28-2007, 04:30 PM	#3
GMCBubba Registered User Join Date: Oct 2006 Location: Simpsonville, SC Posts: 255	Re: 69 3/4 ton power drum brakes pro valve pic request not sure if this helps or not. i actually just changed out the master cylinder today. no power, though. Attached Images __________________ 1969 GMC 3/4 ton, 307, 4-speed NP435GL, DANA 60, 4.10, HD rear leafs, manual everything, leaking oil and water. Now rocking 383, NV4500, power steering, power brakes. Finally undergoing restoration.

01-29-2007, 08:47 PM	#4
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: 69 3/4 ton power drum brakes pro valve pic request to the top. TTT PLEASE anybody?

01-29-2007, 09:06 PM	#5
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: 69 3/4 ton power drum brakes pro valve pic request I dont think there is any diff between power and non power. That block basicly splits the front and rear and houses the warning light switch. The four wheel drum brakes do not use a proportioning valve. I think thats how it works. Even the disc trucks use the same prop valve between 1/2 and 3/4 ton. They are just plumbed different. If yours looks like GMCBubba you should be good to go. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

01-30-2007, 04:54 PM	#6
meathead95 computer illiterate Join Date: Jan 2001 Location: Des Moines, IA Posts: 6,446	Re: 69 3/4 ton power drum brakes pro valve pic request my 70 k20 has a prop valve and so does my 66 mustang so yes drum/drum systems do need a valve. the one in gmcbubba's photo looks just like the one on my 1970 k20 __________________ 72 2wd blazer 72 swb 4x4

01-30-2007, 08:53 PM	#7
Bob Moore Registered User Join Date: Feb 2004 Location: Tacoma WA Posts: 1,365	Re: 69 3/4 ton power drum brakes pro valve pic request Marc - what specifically do you want to see? __________________ 67 C-20 LWB, tilt, speed alert, vac, 454, T400 67 C-10 SWB, factory air with more to follow

01-30-2007, 11:12 PM	#9
pierce Registered User Join Date: Sep 2000 Location: Cincinnati,OH,USA Posts: 464	Re: 69 3/4 ton power drum brakes pro valve pic request rage'nrat638 Here's a couple pics from my 69 3500 it's got factory pwr brakes and 4 drums. These were shot in the fffffreezing dark of night, good thing the flash worked. see if this works... Attached Images __________________ 69 GMC 1 Ton Longhorn 37 Chevy Coupe

01-30-2007, 11:20 PM	#10
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: 69 3/4 ton power drum brakes pro valve pic request thanks man..thats the stuff..from the looks of it..i think my master cyl will work i just need to change the booster thanks everyone!!! and of course i will save the pictures for future use

02-03-2007, 05:09 PM	#11
GMCBubba Registered User Join Date: Oct 2006 Location: Simpsonville, SC Posts: 255	Re: 69 3/4 ton power drum brakes pro valve pic request what is that you have installed just south of the proportioning block in the brake line? looks like a nice, easy swap. will it be that easy to just add power brakes to my manual set-up? __________________ 1969 GMC 3/4 ton, 307, 4-speed NP435GL, DANA 60, 4.10, HD rear leafs, manual everything, leaking oil and water. Now rocking 383, NV4500, power steering, power brakes. Finally undergoing restoration.



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