Master Brake Cylinder - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Edmond · 01-16-2003, 06:05 PM

I'm having trouble getting the right master brake cylinder.
(It's leaking brake fluid between the cylinder and the booster)
Part stores can't seem to get me the right one.
What's so special about this type of cylinder? (I thought it was a fairly common one)
I've found these numbers on it: 5472003 and 332
Maybe one of you guys can help me out here?
(It's for a 1971 C/20 Longhorn)

Thanks in advance!

Cya,
Edmond

Scottri · 01-16-2003, 06:46 PM

Looks like a standard 3/4 brake setup to me. Is it for a front disc brake truck or front drums? I got mine at NAPA.

Scott

JimKshortstep4x4 · 01-16-2003, 07:31 PM

I have had to buy that particular master cylinder by asking the parts store to look up one for a 73 truck. There seems to be someting wrong with the listings because we have had trouble with different stores in regards to master cylinders.

Good luck!

Jim

boilrman · 01-16-2003, 07:59 PM

definitely looks like a 73 and up master to me.

Bill72BB · 01-16-2003, 08:20 PM

I believe it is called a Delco- Moraine cylinder standard on C20 71,72 & later .

Edmond · 01-17-2003, 10:47 AM

1973 and up? Untill which year? 1980?
(I've been looking in some catalogs and Delco-Moraine are listed for the years 71-80.) I'll check it out. Thanks guys.

Scottri : It's for front disc brakes. Going to NAPA is gonna be a bit difficult for me, I'm in the Netherlands.

Cya,
Edmond

**1971Stepside** · 01-17-2003, 10:51 AM

Yeah, I was going to offer to sell you one cheap, but shipping would be a bit@$.....you better find one there.

Edmond · 01-17-2003, 11:12 AM

Thanks 1971Stepside!!

I've just phoned the parts shop and one will be delivered next week.
Hope it's the right one. I'll let you guys know.

Thanks again!

Cya,
Edmond

lukecp · 01-17-2003, 04:10 PM

The master cylinder dosen't have to look exactly alike to work right. I recently put a new one in my truck. The one they gave me at the parts store looked nothing like the one on my truck. The parts guy said that that was OK, and told me what to do.

Remove your old master cylinder first. When you have it removed, go the the back of it where the rod goes in, the rod that comes out of the brake booster. Stick a screwdriver in there and see how deep it it. Get the master cylinder you got from the parts store and do the same thing. If the depths are the same, they should work. Also make sure they mount to the booster in the same manner. You may have to bend the lines a small bit, but it will work just fine.
Good luck!

jim71chevy · 01-17-2003, 09:59 PM

Looks like the on from the 71 3/4 Ihave. The 73 up are more square the 72 parts truck has that style also if you are bench bleeding, if you bottom the piston out you can tear seals out the first pump you do because they are dry just a thought

Edmond · 01-27-2003, 03:28 PM

Well it took some searching, but it is finally on the truck, and in perfect working order.
Thanks for the help guys!!

Cya,
Edmond

GloryHound · 01-28-2003, 04:45 PM

Speaking of master brake cylinders, Has anyone ever seen two single brake cylinders used on one vehicle? Is this stock or a mod someone did?

Thanks

01-16-2003, 06:05 PM	#1
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,063	Master Brake Cylinder I'm having trouble getting the right master brake cylinder. (It's leaking brake fluid between the cylinder and the booster) Part stores can't seem to get me the right one. What's so special about this type of cylinder? (I thought it was a fairly common one) I've found these numbers on it: 5472003 and 332 Maybe one of you guys can help me out here? (It's for a 1971 C/20 Longhorn) Thanks in advance! Cya, Edmond Attached Images __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- The Netherlands

01-16-2003, 06:46 PM	#2
Scottri Registered User Join Date: Jul 2000 Location: Beaverton Oregon USA Posts: 338	Looks like a standard 3/4 brake setup to me. Is it for a front disc brake truck or front drums? I got mine at NAPA. Scott __________________ 1969 GMC 3/4 Ton Long Bed Fleetside 350, 4 speed manual, P/S, P/B, Edelbrock 1406 Carb Beaverton / Portland Oregon Last edited by Scottri; 01-16-2003 at 07:46 PM.

01-16-2003, 07:59 PM	#4
boilrman 70 Chevy 3/4t Join Date: Sep 2000 Location: Kokomo,IN USA Posts: 1,230	definitely looks like a 73 and up master to me. __________________ Find a job you love and you'll never have to work a day in your life. 1998 Yamaha V-Star 650 1970 Chevy 3/4t, I6 (rebuilt), 4 speed Kokomo,IN

01-16-2003, 08:20 PM	#5
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	I believe it is called a Delco- Moraine cylinder standard on C20 71,72 & later . __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen , Last edited by Bill72BB; 01-16-2003 at 08:22 PM.

01-17-2003, 10:47 AM	#6
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,063	1973 and up? Untill which year? 1980? (I've been looking in some catalogs and Delco-Moraine are listed for the years 71-80.) I'll check it out. Thanks guys. Scottri : It's for front disc brakes. Going to NAPA is gonna be a bit difficult for me, I'm in the Netherlands. Cya, Edmond __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- The Netherlands

01-16-2003, 07:31 PM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	I have had to buy that particular master cylinder by asking the parts store to look up one for a 73 truck. There seems to be someting wrong with the listings because we have had trouble with different stores in regards to master cylinders. Good luck! Jim

01-17-2003, 10:51 AM	#7
1971Stepside Almost Satisfied Join Date: Mar 2002 Location: Springfield, MO Posts: 2,932	Yeah, I was going to offer to sell you one cheap, but shipping would be a bit@$.....you better find one there. __________________ 1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far."

01-17-2003, 11:12 AM	#8
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,063	Thanks 1971Stepside!! I've just phoned the parts shop and one will be delivered next week. Hope it's the right one. I'll let you guys know. Thanks again! Cya, Edmond __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- The Netherlands

01-17-2003, 04:10 PM	#9
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	The master cylinder dosen't have to look exactly alike to work right. I recently put a new one in my truck. The one they gave me at the parts store looked nothing like the one on my truck. The parts guy said that that was OK, and told me what to do. Remove your old master cylinder first. When you have it removed, go the the back of it where the rod goes in, the rod that comes out of the brake booster. Stick a screwdriver in there and see how deep it it. Get the master cylinder you got from the parts store and do the same thing. If the depths are the same, they should work. Also make sure they mount to the booster in the same manner. You may have to bend the lines a small bit, but it will work just fine. Good luck! __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

01-17-2003, 09:59 PM	#10
jim71chevy Registered User Join Date: Apr 2001 Location: Canton, Ill Posts: 48	Looks like the on from the 71 3/4 Ihave. The 73 up are more square the 72 parts truck has that style also if you are bench bleeding, if you bottom the piston out you can tear seals out the first pump you do because they are dry just a thought Last edited by jim71chevy; 01-17-2003 at 10:01 PM.

01-27-2003, 03:28 PM	#11
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,063	New one is on the Truck.... Well it took some searching, but it is finally on the truck, and in perfect working order. Thanks for the help guys!! Cya, Edmond Attached Images __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- The Netherlands

01-28-2003, 04:45 PM	#12
GloryHound Working on a Nova. Join Date: Nov 2002 Location: ## Posts: 506	Speaking of master brake cylinders, Has anyone ever seen two single brake cylinders used on one vehicle? Is this stock or a mod someone did? Thanks

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