Powering it up - The 1947 - Present Chevrolet & GMC Truck Message Board Network

krue · 04-20-2003, 11:42 AM

I am about to install a power booster on my truck (no power drums). any words of advice, before it's too late

chevykid1969 · 04-20-2003, 01:07 PM

no words of advice but let me know how it goes. Iam planning on doing the same soon. Good luck

Class of 69 · 04-20-2003, 02:02 PM

It's a very straight forward swap krue, one of the easiest to do. Just be sure to bleed the brakes very well before driving it. Only adjustment is the rod length, after everything is bolted up, and tight, there should be about 1/8 inch free play in the brake pedal to prevent unwanted application. Good Luck

krue · 04-20-2003, 05:27 PM

Got it in, now I need to get the brakes to go with the power.

Oh yeah, where can I find the vacuum hose and fitting for the intake?

Class of 69 · 04-20-2003, 06:30 PM

Buy the vacumm hose new at parts store. Fitting should be on any intake ..junk yard etc. If you can't find one I may have one in my old stash... I'll have to look tomorrow. Do you have the check valve, and grommet for the booster ?

krue · 04-20-2003, 08:42 PM

No check valve, I'm not sure about the grommet.

Here is what I wound up with so far.

krue · 04-20-2003, 09:53 PM

ttt

Class of 69 · 04-20-2003, 10:20 PM

It looks like the check valve is in the grommet in the picture. That would be the white plastic part behind the master. The vacumm hose attaches to it. It keeps the chamber under vacumm if the engine dies, so you can make one final assisted stop on the side of the road.

**Palf70Step** · 04-20-2003, 10:34 PM

Dang I'm getting old krue.....Can't remember yesterday. I know the check vavlve is missing. It was cracked. I assume the grommet is all there. We used the check valve on my the other truck when we tested it for vacumn leaks..

Class of 69...what you see is old fashion papertowel plug to keep dust out of the hole. I had to look twice at Krue's picture. Forgot I dabe a pice their to keep out the dust.

Class of 69 · 04-20-2003, 11:09 PM

OK LOL!!! couldn't really tell by the picture. So, you'll need a check valve too krue...readily available at auto parts store along with the hose.

krue · 04-21-2003, 05:48 AM

Thanks for the help guys! BTW why are brake lines such a booger to get started? I almost never got them back in the proportioning valve!

Class of 69 · 04-21-2003, 09:33 PM

It helps to leave everything loose until you get all the lines started, even the prop valve to bracket bolts. Brake lines seem to need to be aligned exactly straight to start the threads.

Jackal2k9 · 04-21-2003, 09:36 PM

do the front brakes go in the front resevoir or visa-versa?

krue · 04-21-2003, 09:51 PM

I'd have to trace it out. It's two different sized lines going into the proportioning valve, that's how I kept them straight.

**Palf70Step** · 04-21-2003, 10:15 PM

Depends...C10s front to rear resivoir Front resv to rear brakes...
for some reason c20 front to front and resr to rear. Why...Idunno. that's way I have always seen them.

Jackal2k9 · 04-21-2003, 10:59 PM

front to front makes sense so the main resevoir would be full if you were low on fluid in a hard stop. I think im gonna switch mine either way unless someone can think of a reason not to other than "it dont fit". please tell. im trying to make it more safe because i have had trouble with hot brake fluid spillng out of the resevoir.

Class of 69 · 04-21-2003, 11:12 PM

If the seal in the cap is old and hardened, fluid will leak out. Scrape any rust off the top edge of the master, and replace the seal...should stop leaking.

04-20-2003, 11:42 AM	#1
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Powering it up I am about to install a power booster on my truck (no power drums). any words of advice, before it's too late __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-20-2003, 02:02 PM	#3
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	It's a very straight forward swap krue, one of the easiest to do. Just be sure to bleed the brakes very well before driving it. Only adjustment is the rod length, after everything is bolted up, and tight, there should be about 1/8 inch free play in the brake pedal to prevent unwanted application. Good Luck __________________ 69 GMC K10 ..some restoration required....still..

04-20-2003, 05:27 PM	#4
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Got it in, now I need to get the brakes to go with the power. Oh yeah, where can I find the vacuum hose and fitting for the intake? __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-20-2003, 06:30 PM	#5
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	Buy the vacumm hose new at parts store. Fitting should be on any intake ..junk yard etc. If you can't find one I may have one in my old stash... I'll have to look tomorrow. Do you have the check valve, and grommet for the booster ? __________________ 69 GMC K10 ..some restoration required....still..

04-20-2003, 08:42 PM	#6
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	No check valve, I'm not sure about the grommet. Here is what I wound up with so far. Attached Images __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-20-2003, 01:07 PM	#2
chevykid1969 Registered User Join Date: Apr 2003 Location: Knightdale,North Carolina Posts: 377	no words of advice but let me know how it goes. Iam planning on doing the same soon. Good luck

04-20-2003, 09:53 PM	#7
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	ttt __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-20-2003, 10:20 PM	#8
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	It looks like the check valve is in the grommet in the picture. That would be the white plastic part behind the master. The vacumm hose attaches to it. It keeps the chamber under vacumm if the engine dies, so you can make one final assisted stop on the side of the road. __________________ 69 GMC K10 ..some restoration required....still..

04-20-2003, 10:34 PM	#9
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,818	Dang I'm getting old krue.....Can't remember yesterday. I know the check vavlve is missing. It was cracked. I assume the grommet is all there. We used the check valve on my the other truck when we tested it for vacumn leaks.. Class of 69...what you see is old fashion papertowel plug to keep dust out of the hole. I had to look twice at Krue's picture. Forgot I dabe a pice their to keep out the dust. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

04-20-2003, 11:09 PM	#10
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	OK LOL!!! couldn't really tell by the picture. So, you'll need a check valve too krue...readily available at auto parts store along with the hose. __________________ 69 GMC K10 ..some restoration required....still..

04-21-2003, 05:48 AM	#11
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Thanks for the help guys! BTW why are brake lines such a booger to get started? I almost never got them back in the proportioning valve! __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-21-2003, 09:33 PM	#12
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	It helps to leave everything loose until you get all the lines started, even the prop valve to bracket bolts. Brake lines seem to need to be aligned exactly straight to start the threads. __________________ 69 GMC K10 ..some restoration required....still..

04-21-2003, 09:36 PM	#13
Jackal2k9 Registered User Join Date: Apr 2002 Location: Katy, Texas Posts: 171	do the front brakes go in the front resevoir or visa-versa?

04-21-2003, 09:51 PM	#14
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	I'd have to trace it out. It's two different sized lines going into the proportioning valve, that's how I kept them straight. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

04-21-2003, 10:15 PM	#15
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,818	Depends...C10s front to rear resivoir Front resv to rear brakes... for some reason c20 front to front and resr to rear. Why...Idunno. that's way I have always seen them. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!



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04-21-2003, 10:59 PM	#16
Jackal2k9 Registered User Join Date: Apr 2002 Location: Katy, Texas Posts: 171	front to front makes sense so the main resevoir would be full if you were low on fluid in a hard stop. I think im gonna switch mine either way unless someone can think of a reason not to other than "it dont fit". please tell. im trying to make it more safe because i have had trouble with hot brake fluid spillng out of the resevoir. Last edited by Jackal2k9; 04-21-2003 at 11:05 PM.

04-21-2003, 11:12 PM	#17
Class of 69 Registered User Join Date: Mar 2003 Location: Stillwater MN Posts: 1,166	If the seal in the cap is old and hardened, fluid will leak out. Scrape any rust off the top edge of the master, and replace the seal...should stop leaking. __________________ 69 GMC K10 ..some restoration required....still..

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