which master cylinder for my c10? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Pont406 · 07-04-2012, 01:58 AM

I searched and found 2 brand of masters for 72 c10 truck Delco Moraine and Bendix.Here is where it gets a little treaky. My 69 c10 had powered drum brakes with bendix booster. Now it has a basiclly 72 set up with bendix booster. I had some small brake problems and nailed down to a wrong master cylinder. Before we take my new proportioning valve and gut rear section to run adjustble valve from summit i want to check here first.
I have a reman bendix booster with delco master cylinder. Are they interchange or not? I had gauges install on the rear and readings were low. Dont remember the numbers but my buddy wants me to double it with using summit adjusting proportioning valve but only for the rear. I want to try a correct master first. He says that they are all intechange. So, do I have a right master on it now? Thanks a lot.

cdowns · 07-04-2012, 06:55 AM

a 69 with drum brakes does not need a proportioning valkve never had one from the factory either

**Palf70Step** · 07-04-2012, 07:04 AM

If you have a 72 master cylinder, the fluid reservoir is unbalanced in size. The drum/drum setup of the pre71 had both reservoirs of equal size. When front disks came out, the from side became larger to pump more fluid to the from brakes. If you are using a 72 MC that maybe the issue with the brakes being unbalanced feeling.

Like cdowns said, there is no proportion valve for drum/drum, just a distribution block.

Pont406 · 07-04-2012, 04:41 PM

Sorry, it's disc brakes up front. I want to try a master with a single clip for the cover. Are there any differences between single and double clips masters?

**Palf70Step** · 07-04-2012, 04:54 PM

Not that I know of

07-04-2012, 01:58 AM	#1
Pont406 Registered User Join Date: Aug 2007 Location: West Hills, California Posts: 679	which master cylinder for my c10? I searched and found 2 brand of masters for 72 c10 truck Delco Moraine and Bendix.Here is where it gets a little treaky. My 69 c10 had powered drum brakes with bendix booster. Now it has a basiclly 72 set up with bendix booster. I had some small brake problems and nailed down to a wrong master cylinder. Before we take my new proportioning valve and gut rear section to run adjustble valve from summit i want to check here first. I have a reman bendix booster with delco master cylinder. Are they interchange or not? I had gauges install on the rear and readings were low. Dont remember the numbers but my buddy wants me to double it with using summit adjusting proportioning valve but only for the rear. I want to try a correct master first. He says that they are all intechange. So, do I have a right master on it now? Thanks a lot. Attached Images

07-04-2012, 06:55 AM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: which master cylinder for my c10? a 69 with drum brakes does not need a proportioning valkve never had one from the factory either __________________ 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

07-04-2012, 07:04 AM	#3
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: which master cylinder for my c10? If you have a 72 master cylinder, the fluid reservoir is unbalanced in size. The drum/drum setup of the pre71 had both reservoirs of equal size. When front disks came out, the from side became larger to pump more fluid to the from brakes. If you are using a 72 MC that maybe the issue with the brakes being unbalanced feeling. Like cdowns said, there is no proportion valve for drum/drum, just a distribution block. __________________ 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!

07-04-2012, 04:41 PM	#4
Pont406 Registered User Join Date: Aug 2007 Location: West Hills, California Posts: 679	Re: which master cylinder for my c10? Sorry, it's disc brakes up front. I want to try a master with a single clip for the cover. Are there any differences between single and double clips masters? Last edited by Pont406; 07-04-2012 at 04:48 PM.

07-04-2012, 04:54 PM	#5
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: which master cylinder for my c10? Not that I know of __________________ 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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