Brake Booster from yard

[sb69chevy]

I'm sure it's a crap shoot, but what's the odds that a yard brake booster will be any good? Also, what size/manufacturer would be recommended to use? I saw about 3 different sizes today. If nothing else, I'd like to have the brackets off of them. Do any of them sit close to the firewall?

[Bus Ted Knuckle]

Grab those brackets when you see them..can't have too many of those. Better get the rod from the pedal to the booster too though.

Your right it is a crap shoot to get one out of a wrecking yard. I guess youcould try one, and if it is no good use it as a core at your LFAPS. You can get a reman at Advance for $89

I'm not sure of the best size, or what the original size is for that matter...Ive never measured!

[sb69chevy]

I think I counted 4 sets of brackets and I know at least 2 were still attached to the brake pedal. What would be a good price for the brackets?

[rage'nrat638]

theres two sizes of brackets
BENDIX MAKES A SHORT & LONG BRACKET

DELCO MAKES A SHORT & LONG BRACKET

BOTH OF THESE SHOWN ARE BENDIX

THE FIRST IS A 1/2 TON SINGLE DIPHRAGM
THE SECOND IS A 3/4 DUAL DIPHRAGM

[sb69chevy]

Will it matter which I use on my truck?

[rage'nrat638]

o boy here we go...

#### need to edit my previous post ####

this is where the fun starts

this is what i understand (could be wrong)

bendix has the long adjusting rod sticking out of its boosters (master has a deep hole)

delco has the short rod (MASTER HAS A DIMPLE)

BOTH BOOSTERS SHOWN ARE BENDIX BOOSTERS


BOTH BOOSTERS 1/2 TON AND 3/4 TON HAVE DIFFERENT LENGTH RODS STICKING OUT THE REAR THUS THE DIFFERENT SIZE BRACKETS

THE PEDAL TO THE BOOSTER ROD SHOULD BE THE SAME BETWEEN THE TWO

THE MANUAL BRAKE TRUCK .. PEDAL TO MASTER ROD ..WON'T WORK WITH THE POWER BRAKE BOOSTER

[rage'nrat638]

CONFUSED YET

REREAD EVERY THING I JUST ADDED A TON OF INFO TO BOTH PICTURES THATS EVERYTHING I KNOW..

THE TWO DIFFERENT MFG'S PARTS DON'T MIX

ASK ANYBODY ABOUT THAT

[rage'nrat638]

as far as boosters from the junk yard..the only thing you can rely on there is that you will have a core to return

theres rubber diaphragms inside and rubber seals on the outside.. those are sure to be shot after 30 plus years

[sb69chevy]

Yes, confused, but I'll figure it out. Let's say I put the bendix on the truck and the booster is bad...do they remanufacture each style of booster? I know, I'm dumb.

[sb69chevy]

Okay, I have manual brakes, so are you saying the rod from booster to pedal wouldn't be able to attach? Need a pedal from a pb truck? If so, one was still attached.

[rage'nrat638]

the pedal will be the same the rod will be different

the rod from the pedal to the back of the booster brackets

the best thing to do is take pictures of your rod and post them here on this thread so i can save the picture and label it.

if everybody did this we could have a very comprehensive
detail of the different brake set-ups on these trucks

this is what the rod looks like the one you need

[sb69chevy]

Okay, thanks rat. I'll make sure that I take that w/ me when I get this set up. Will I need to drill new holes in the firewall, or will the bracket attach to the mc holes?

[rage'nrat638]

yes i think all the bolts and holes should already be there.

i know theres a few here that have done this conversion.

just wish we could get all the pictures and explanations together

your pal mark

[sb69chevy]

Thanks again, Mark. Any idea what this setup will cost...ballpark?

[rage'nrat638]

Originally Posted by sb69chevy

Thanks again, Mark. Any idea what this setup will cost...ballpark?

i bought mine at advance auto over the counter for 180.00
with the master cyl the 3/4 ton dual diaphragm model.
i have a 3/4 ton truck that had that black pictured 1/2 ton
booster on it.

i think auto zone has them cheaper but i don't like the auto zone by me.

i just degreased my new one and sprayed it with clear to keep it from rusting.

and used the existing master cyl


the last picture should be whats on your truck
you can see the bolts are already there !!!!

[Bus Ted Knuckle]

Originally Posted by sb69chevy

Okay, thanks rat. I'll make sure that I take that w/ me when I get this set up. Will I need to drill new holes in the firewall, or will the bracket attach to the mc holes?

Yeah all of the bolt holes are there (with bolts in them already). there are 4 right around the master cylinder, you use one on the collar on the end of the steering column, and then iirc, one of the ebrake pedal bolts.

[GMCMAX]

What I did on the 69 half ton, with pics
http://67-72chevytrucks.com/vboard/s...d.php?t=221598

[Americanrider]

Go get yourself a Mighty-vac hand pump kit:

http://www.harborfreight.com/cpi/cta...emnumber=38053

I paid $39 at Sears, but they are cheaper at Harbor freight. It come with an assortment of fittings and bleeder tips. At least one of the fittings will work on the Vac line inlet of the booster. Hook it up and pump it to about 20-25lbs and let it set for a minute. If the Vacuum bleeds down the booster diaphram is shot.

These hand pumps are great for doing a one-man brake bled once you install your new system. I have had mine for over 3 years now and it still works great.

On a side note:
I found a 64-66 brake booster in a wrecking yard for $12 and was able to test it. It held 25lbs for over a minute and I sold it for $50 bucks on Craigslist, it will pay for itself.

[EAST SIDE LOW LIFE]

I took my pwr brake set up out of my $200.00 dollar donor parts truck a 71 Chev P/UP. I detailed it, the booster showed no signs of being rusty so I took it that it had already been replaced. (works fine.)

I was always under the asumption that the perportioning valve on the pwr brake set up should be used instead of the manual one. Either will work but they are supposed to be different from each other. I always play it safe and swap every thing over. They appear physicaly different and thats enough of a reason for me to change it.

Parts cost free .... I stripped the 71 in about 2 weeks and had the wrecker tow it away ... tow charge free. Sold grill, head light buckets trim parts & got my $200.00 dollars back. This truck was not even for sale just sitting in this persons yard. I asked if they would sell it and the rest is history.

esll.