64 brake master cylinder question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RussTburb · 09-30-2009, 11:45 PM

Hey guys, I am a 72 burb owner but love all these old chevy trucks! A friend of mine has a 64 c-10 pick up and it has brake issues. I replaced all 4 wheel cylinders and want to replace the master cylinder. I ordered one from the local Napa store and the counter guy claimed to know quite a bit about these trucks, he swears this is the right one for this truck. The part master cylinder I got looks completely different from the one that was on there. The one that I took off has a round reservoir with a spring clip to hold the cap on. The mounting bolts are horizontal. The brakes worked well until the master cylinder and wheel cylinder all seemed to fail at once. The new Master cylinder has a square recover and the cap is held on with a stud and nut. The mounting bolt holes are at an angle. The new master might bolt up but the push rod is too long and you can't even get the bolts started. Any one have an idea what is going on here? Should I just take the square the one back and get the round one? What year is that off of and how do I order it? Is the push rod that is in the truck (looks newer) adjustable enough? Oh I just remembered that the single line that goes to the brakes threads into the masters at different location too. Not that that can't be fixed. Any help you all can provide would be greatly appreciated!
Thanks for you time,
Dennis

**Captainfab** · 10-01-2009, 12:02 AM

The one you got at Napa sounds like the original style found on a '63. I always thought they would interchange though. Did you try adjusting the pushrod any? If I'm not mistaken the '64-'66's used the same master. You might try having them look up one for a '65 or '66 and see what it looks like

RussTburb · 10-02-2009, 11:23 AM

No, I haven't tried adjusting it yet, I am not sure if there is enough adjustment there. I guess I will try it and if it doesn't work I'll try ordering a different one. Thanks for you your reply!
Dennis

RussTburb · 10-02-2009, 12:26 PM

UPDATE:
I looked up a 63 w/ manual brakes online at Napa. It shows the 1"bore round single bore master cylinder. It looks like the right one. So I'm going to trade it and see if I can get this baby back on the road! Thanks for your help.
Dennis

**Chevy Fleetside** · 10-02-2009, 12:34 PM

The one you have is for the 60-61 maybe even 62 model trucks. They better take it back since they gave you the wrong one. Here print this page and bring it to the know it all. http://www.truckandcarshop.com/trucks60_72/t60_113.html

RussTburb · 10-02-2009, 12:51 PM

I've spoken to napa, they have the corect one on the shelf and have agreed to take the wrong one back. The shop I work for does a lot of business with them so they take good care of us! I knew that by posting this here I'd get the right answers. Can't always rely on Napa catalouge.

09-30-2009, 11:45 PM	#1
RussTburb Registered User Join Date: Mar 2002 Location: Blaine,Wa. U.S.A Posts: 261	64 brake master cylinder question Hey guys, I am a 72 burb owner but love all these old chevy trucks! A friend of mine has a 64 c-10 pick up and it has brake issues. I replaced all 4 wheel cylinders and want to replace the master cylinder. I ordered one from the local Napa store and the counter guy claimed to know quite a bit about these trucks, he swears this is the right one for this truck. The part master cylinder I got looks completely different from the one that was on there. The one that I took off has a round reservoir with a spring clip to hold the cap on. The mounting bolts are horizontal. The brakes worked well until the master cylinder and wheel cylinder all seemed to fail at once. The new Master cylinder has a square recover and the cap is held on with a stud and nut. The mounting bolt holes are at an angle. The new master might bolt up but the push rod is too long and you can't even get the bolts started. Any one have an idea what is going on here? Should I just take the square the one back and get the round one? What year is that off of and how do I order it? Is the push rod that is in the truck (looks newer) adjustable enough? Oh I just remembered that the single line that goes to the brakes threads into the masters at different location too. Not that that can't be fixed. Any help you all can provide would be greatly appreciated! Thanks for you time, Dennis __________________ "Red-heads not war-heads, Blondes, not bombs, Brunettes, not fighter jets!" Fligh of the Choncords 72 burb 3/4 ton 2wd 06 2500 suburban 8.1L 4x4 84 chev 4x4 diesel 96 Geo Metro with the 4cylbb, lol! Almost 300k just won't die! 89 Honda Civic, runs on the smell of an oily rag! 2008 Aerolite 26qs Travel Trailer (aka "THE BARN")

10-01-2009, 12:02 AM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 64 brake master cylinder question The one you got at Napa sounds like the original style found on a '63. I always thought they would interchange though. Did you try adjusting the pushrod any? If I'm not mistaken the '64-'66's used the same master. You might try having them look up one for a '65 or '66 and see what it looks like __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

10-02-2009, 11:23 AM	#3
RussTburb Registered User Join Date: Mar 2002 Location: Blaine,Wa. U.S.A Posts: 261	Re: 64 brake master cylinder question No, I haven't tried adjusting it yet, I am not sure if there is enough adjustment there. I guess I will try it and if it doesn't work I'll try ordering a different one. Thanks for you your reply! Dennis __________________ "Red-heads not war-heads, Blondes, not bombs, Brunettes, not fighter jets!" Fligh of the Choncords 72 burb 3/4 ton 2wd 06 2500 suburban 8.1L 4x4 84 chev 4x4 diesel 96 Geo Metro with the 4cylbb, lol! Almost 300k just won't die! 89 Honda Civic, runs on the smell of an oily rag! 2008 Aerolite 26qs Travel Trailer (aka "THE BARN")

10-02-2009, 12:26 PM	#4
RussTburb Registered User Join Date: Mar 2002 Location: Blaine,Wa. U.S.A Posts: 261	Re: 64 brake master cylinder question UPDATE: I looked up a 63 w/ manual brakes online at Napa. It shows the 1"bore round single bore master cylinder. It looks like the right one. So I'm going to trade it and see if I can get this baby back on the road! Thanks for your help. Dennis __________________ "Red-heads not war-heads, Blondes, not bombs, Brunettes, not fighter jets!" Fligh of the Choncords 72 burb 3/4 ton 2wd 06 2500 suburban 8.1L 4x4 84 chev 4x4 diesel 96 Geo Metro with the 4cylbb, lol! Almost 300k just won't die! 89 Honda Civic, runs on the smell of an oily rag! 2008 Aerolite 26qs Travel Trailer (aka "THE BARN")

10-02-2009, 12:34 PM	#5
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,782	Re: 64 brake master cylinder question The one you have is for the 60-61 maybe even 62 model trucks. They better take it back since they gave you the wrong one. Here print this page and bring it to the know it all. http://www.truckandcarshop.com/trucks60_72/t60_113.html __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 Last edited by Chevy Fleetside; 10-02-2009 at 12:36 PM.

10-02-2009, 12:51 PM	#6
RussTburb Registered User Join Date: Mar 2002 Location: Blaine,Wa. U.S.A Posts: 261	Re: 64 brake master cylinder question I've spoken to napa, they have the corect one on the shelf and have agreed to take the wrong one back. The shop I work for does a lot of business with them so they take good care of us! I knew that by posting this here I'd get the right answers. Can't always rely on Napa catalouge. __________________ "Red-heads not war-heads, Blondes, not bombs, Brunettes, not fighter jets!" Fligh of the Choncords 72 burb 3/4 ton 2wd 06 2500 suburban 8.1L 4x4 84 chev 4x4 diesel 96 Geo Metro with the 4cylbb, lol! Almost 300k just won't die! 89 Honda Civic, runs on the smell of an oily rag! 2008 Aerolite 26qs Travel Trailer (aka "THE BARN")



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