Brakes - Combination Valve - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stope4 · 11-01-2007, 10:20 AM

Has anyone ever rebuilt one of these? Does anyone sell original rebuilt?

cdowns · 11-01-2007, 10:57 AM

i dont believe they are rebuildable// 10years or so ago they were available new from gm dealers

Orange · 11-01-2007, 11:52 AM

Early Classic sells these if this is what you are talking about:

http://earlyclassic.com/catalog.aspx
(Can't give a direct link - just go to brakes in their catalog, it's on page 2 I think).

DLB

grayw0lf · 11-01-2007, 01:11 PM

Chevy Duty also sells them.

stope4 · 11-05-2007, 03:34 PM

For some reason, the early classic one looks slightly different than the two I have. Has anybody ever tore one apart, cleaned it up, replaced the o-rings and reused? If you did, did it work correctly afterwards?

Greywolf, I do not believe there is a ChevyDuty.

stope4 · 11-07-2007, 05:00 PM

I tore into one of the two of these I have this weekend. Suprisingly, these things are pretty simple. Looks like all you need are o-rings and a good cleaning to get this thing running smothly again. Does anyone have information on the proper sized o'rings. I went to O'Reilly's and tried to match them. They had o'rings that were the same overall diameter but the problem is the combination valve uses o'rings where the rubber itself is different diameters. Need some expert knowledge here.

stope4 · 11-14-2007, 04:24 PM

O.K., I had to hunt for the o'rings but I finally located the correect sizes. Does anyone know where I can find the v-cup seal that is located under the big bolt on the end of this contraption. I think it's mainly used as a dust seal but not 100% certain.

**john** · 11-14-2007, 05:11 PM

You should make sure the seals are compatible with brake fluid.

stope4 · 11-14-2007, 10:44 PM

They are. The place I purchased them said they needed to be EP o-rings.

11-01-2007, 10:20 AM	#1
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Brakes - Combination Valve Has anyone ever rebuilt one of these? Does anyone sell original rebuilt?

11-01-2007, 10:57 AM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Brakes - Combination Valve i dont believe they are rebuildable// 10years or so ago they were available new from gm dealers __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

11-01-2007, 11:52 AM	#3
Orange Licensed to Thrill! Join Date: Apr 2006 Location: Northwest, GA Posts: 1,673	Re: Brakes - Combination Valve Early Classic sells these if this is what you are talking about: http://earlyclassic.com/catalog.aspx (Can't give a direct link - just go to brakes in their catalog, it's on page 2 I think). DLB __________________ 1971 GMC.Lowered. Overdrive. Orange. Krue's excellent FAQ Index. Last edited by Orange; 11-01-2007 at 11:52 AM.

11-01-2007, 01:11 PM	#4
grayw0lf Registered User Join Date: Apr 2004 Location: Clanton, AL Posts: 1,253	Re: Brakes - Combination Valve Chevy Duty also sells them. __________________ 85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal!

11-05-2007, 03:34 PM	#5
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: Brakes - Combination Valve For some reason, the early classic one looks slightly different than the two I have. Has anybody ever tore one apart, cleaned it up, replaced the o-rings and reused? If you did, did it work correctly afterwards? Greywolf, I do not believe there is a ChevyDuty. Last edited by stope4; 11-05-2007 at 03:37 PM.

11-07-2007, 05:00 PM	#6
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: Brakes - Combination Valve I tore into one of the two of these I have this weekend. Suprisingly, these things are pretty simple. Looks like all you need are o-rings and a good cleaning to get this thing running smothly again. Does anyone have information on the proper sized o'rings. I went to O'Reilly's and tried to match them. They had o'rings that were the same overall diameter but the problem is the combination valve uses o'rings where the rubber itself is different diameters. Need some expert knowledge here.

11-14-2007, 04:24 PM	#7
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: Brakes - Combination Valve O.K., I had to hunt for the o'rings but I finally located the correect sizes. Does anyone know where I can find the v-cup seal that is located under the big bolt on the end of this contraption. I think it's mainly used as a dust seal but not 100% certain.

11-14-2007, 05:11 PM	#8
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Brakes - Combination Valve You should make sure the seals are compatible with brake fluid. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

11-14-2007, 10:44 PM	#9
stope4 Registered User Join Date: Jan 2006 Location: Houston Posts: 434	Re: Brakes - Combination Valve They are. The place I purchased them said they needed to be EP o-rings.



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