power drum breaks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

meyer4589 · 05-26-2011, 08:17 PM

how hard and what does it take to make a non-power drum truck a power brakes equipped front and rear drum truck

**michael bustamante** · 05-26-2011, 08:38 PM

all I did was add a pb booster and pedal rod from a 72. you learn real quick to change you habits in how hard to push the brake pedal!

Longhorn Man · 05-26-2011, 09:16 PM

add the booster, the brackets that hold the booster to the firewall, replace the pushrod, that's it. You don't even have to replace the brake lines, just gently pull the master cylinder away from the firewall. I recently swapped mine from power (with a junk booster) to manual.

brad_man_72 · 05-26-2011, 11:05 PM

be careful I exploded a front drum on my 67 without power going down the highway.
I have power disc now.....

GMCMAX · 05-26-2011, 11:35 PM

Try this...
http://67-72chevytrucks.com/vboard/s...d.php?t=221598

meyer4589 · 05-27-2011, 10:35 AM

Thanks for the info guys. Question, where does the vacuum line hook up to from the power booster on an inline 6?

Classic69 · 05-27-2011, 11:20 AM

Quote:

Originally Posted by michael bustamante

all I did was add a pb booster and pedal rod from a 72. you learn real quick to change you habits in how hard to push the brake pedal!

lol...I learned real quick to change my braking habits, in how hard to push the brake pedal...I almost hit the windshield my 1st time

But all I did was buy a new power brake booster & added it to my manual drum brake setup. It was a VERY good upgrade!!!

Classic69 · 05-27-2011, 11:25 AM

Quote:

Originally Posted by meyer4589

Thanks for the info guys. Question, where does the vacuum line hook up to from the power booster on an inline 6?

I believe on inline 6's (I used to have one) there is a pipe plug on the side of the intake manifold. Pull this plug out & put in a fitting for a 3/8 vacuum line hose. Hook this to the power brake unit.

68gmsee · 05-27-2011, 11:56 AM

Re: where to hookup.

You can remove the plug under the carb on the intake manifold and install a power booster adapter you can get at Auto Zone. I just did a brake job on my 68 and reinstalled my old brake booster that I removed a couple of years ago.

If you go to the salvage yards for one, also get the brake push rod inside the cab. It's easier to remove the push rod after you remove the engine bay bracket asm. This way you can push the brake pedal forward to access the bolt.

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Longhorn Man · 05-27-2011, 07:34 PM

Quote:

Originally Posted by brad_man_72

be careful I exploded a front drum on my 67 without power going down the highway.
I have power disc now.....

Shattered drums is from lack of inspecting the drums... just like the shattered disk rotor I replaced last month at work on an international box truck.

05-26-2011, 08:17 PM	#1
meyer4589 Registered User Join Date: Mar 2009 Location: Highland, IN Posts: 64	power drum breaks how hard and what does it take to make a non-power drum truck a power brakes equipped front and rear drum truck Last edited by meyer4589; 05-26-2011 at 08:31 PM.

05-26-2011, 08:38 PM	#2
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,858	Re: power drum breaks all I did was add a pb booster and pedal rod from a 72. you learn real quick to change you habits in how hard to push the brake pedal! __________________ 1967custom

05-26-2011, 09:16 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: power drum breaks add the booster, the brackets that hold the booster to the firewall, replace the pushrod, that's it. You don't even have to replace the brake lines, just gently pull the master cylinder away from the firewall. I recently swapped mine from power (with a junk booster) to manual.

05-26-2011, 11:05 PM	#4
brad_man_72 the boat guy Join Date: Jul 2007 Location: springfield mo Posts: 2,339	Re: power drum breaks be careful I exploded a front drum on my 67 without power going down the highway. I have power disc now..... __________________ 67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project,

05-26-2011, 11:35 PM	#5
GMCMAX Active Member Join Date: Jan 2006 Location: Lower Mid-East Ca. Posts: 326	Re: power drum breaks Try this... http://67-72chevytrucks.com/vboard/s...d.php?t=221598 __________________ Never try to teach a pig to sing; it wastes your time and annoys the pig! Gets More Chicks My lugnuts require more torque than your honda makes! 68 GMC, 4X4 conversion w/73 k20 running gear and springs, 350 4spd, 4.10's, D44 powerlok front, 14BFF govlock rear, 33" tires, lifted 4".

05-27-2011, 10:35 AM	#6
meyer4589 Registered User Join Date: Mar 2009 Location: Highland, IN Posts: 64	Re: power drum breaks Thanks for the info guys. Question, where does the vacuum line hook up to from the power booster on an inline 6?

05-27-2011, 11:56 AM	#9
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: power drum breaks Re: where to hookup. You can remove the plug under the carb on the intake manifold and install a power booster adapter you can get at Auto Zone. I just did a brake job on my 68 and reinstalled my old brake booster that I removed a couple of years ago. If you go to the salvage yards for one, also get the brake push rod inside the cab. It's easier to remove the push rod after you remove the engine bay bracket asm. This way you can push the brake pedal forward to access the bolt. [IMG][/IMG] [IMG][/IMG] Last edited by 68gmsee; 05-27-2011 at 07:23 PM. Reason: ...meant intake manifold.



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