Disc Brake Question??????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

justin · 09-08-2002, 06:59 AM

Last night I tried to bleed my all new brake system. The master cylinder,lines,pads,shoes,calipers are all new. Here is the question, Do you have to bleed the master cylinder somehow? I put brake fluid in and pumped the brakes about 1000 times but the fluid never went into the lines. I tried opening up a couple bleeder valves but the fluid would still not come thru the line?? Does the truck have to be running to get vaccuum to the booster??
Thanks for any help you may be able to give.
Justin

chevyman 68 C/10 · 09-08-2002, 07:27 AM

You can bleed the master cylinder at the lines on it. I always bench bleed it by pumping it by hand before I install it. You might want to place a rag around the area to help keep from getting fluid all over your engine compartment.

justin · 09-08-2002, 07:35 AM

So how do you go about bleeding the m/c? Do I need to disconect the lines?

6869704X4 · 09-08-2002, 10:40 AM

Try the directions that came with the mc. I did that once and it worked!hehe
Seriously, I bet your new mc came with a couple of plastic fittings and two pieces of hose. If not you can buy them or make them out of your old brake lines. Disconect the lines at the mc and put these in. Stick the ends in the res with fluid in it. "SLOWLY" work the brake pedal untill there are no bubbles comming out.
Can send pics if you need.

Dandeluxe · 09-08-2002, 10:58 AM

Justin, the best way to bleed the master cyl. is to bench bleed it. i had the same problem when putting mine on. at first i didnt get good flow. but after putting it on the vice and bench bleeding it after 100 pumps or so it started really flowing hard and consistent. at first it was real soft and slow but it got better after this . i thought my master cyl. was bad, but it wasnt the problem though. hope this info. helps . good luck, DAN

justin · 09-08-2002, 11:29 AM

Thanks for the helpfull hints! I will try them out tomarrow. As for today, I am couch bound to watch the RAMS A.K.A "GREATEST SHOW ON TURF" kick the snot out of the Broncos.

vfrdude · 09-09-2002, 05:51 PM

Looks like the 'show' was cancelled yesterday....

justin · 09-09-2002, 06:21 PM

YEA,YEA,
That game was a big time joke! You ever heard of a payoff?ha-ha
O well, It is a long season, and we prevail!

colohusker · 09-09-2002, 07:49 PM

Yep, thought for sure Griese was paid off to lose that game in the 3rd quarter!

justin · 09-09-2002, 08:16 PM

yea colohusker, he wasn't too hot in the 3rd but he stepped it up in the 4th!
I grew up in Lakewood, CO. I am still a broncos fan but not when they are playing the RAMS.

09-08-2002, 06:59 AM	#1
justin PROJECT LO-LYF Join Date: Jul 2002 Location: MO. Posts: 283	Disc Brake Question??????? Last night I tried to bleed my all new brake system. The master cylinder,lines,pads,shoes,calipers are all new. Here is the question, Do you have to bleed the master cylinder somehow? I put brake fluid in and pumped the brakes about 1000 times but the fluid never went into the lines. I tried opening up a couple bleeder valves but the fluid would still not come thru the line?? Does the truck have to be running to get vaccuum to the booster?? Thanks for any help you may be able to give. Justin __________________ FOUNDING MEMBER OF THE "O-SH*T, THAT TRUCK IS LOW" CLUB PROJECT: LO-LYF Bagged 68 Shorty home.att.net/~justin.lewis

09-08-2002, 07:27 AM	#2
chevyman 68 C/10 Registered User Join Date: Feb 2002 Location: Gilmer, Texas USA Posts: 313	You can bleed the master cylinder at the lines on it. I always bench bleed it by pumping it by hand before I install it. You might want to place a rag around the area to help keep from getting fluid all over your engine compartment. __________________ 69 Chevy short fleet side soon to have LT1 and 4L60E pb. ps cruise and air. 68 Chevy short fleet side 400 sb 5 inch chop top pb. ps. pw. 350 auto and shaved handles 68 anniversary no engine long wheel base 400 auto FOR SALE 68 Chevy fleet side long wheel base complete parts truck.

09-08-2002, 07:35 AM	#3
justin PROJECT LO-LYF Join Date: Jul 2002 Location: MO. Posts: 283	So how do you go about bleeding the m/c? Do I need to disconect the lines? __________________ FOUNDING MEMBER OF THE "O-SH*T, THAT TRUCK IS LOW" CLUB PROJECT: LO-LYF Bagged 68 Shorty home.att.net/~justin.lewis

09-08-2002, 10:40 AM	#4
6869704X4 Registered User Join Date: Jul 2002 Location: SE NM Posts: 769	Try the directions that came with the mc. I did that once and it worked!hehe Seriously, I bet your new mc came with a couple of plastic fittings and two pieces of hose. If not you can buy them or make them out of your old brake lines. Disconect the lines at the mc and put these in. Stick the ends in the res with fluid in it. "SLOWLY" work the brake pedal untill there are no bubbles comming out. Can send pics if you need. __________________ The more I learn about women, the more I love my truck.

09-08-2002, 10:58 AM	#5
Dandeluxe Senior Member Join Date: Nov 2001 Location: st.louis mo. Posts: 717	BLEEDING BRAKES? Justin, the best way to bleed the master cyl. is to bench bleed it. i had the same problem when putting mine on. at first i didnt get good flow. but after putting it on the vice and bench bleeding it after 100 pumps or so it started really flowing hard and consistent. at first it was real soft and slow but it got better after this . i thought my master cyl. was bad, but it wasnt the problem though. hope this info. helps . good luck, DAN Attached Images __________________ 1969 cst swb 350/400 th . DANNY C . ["]FRIENDS DONT LET FRIENDS DRIVE F@RD$!! 1969 cst swb corvette hugger orange with 400 hp sbc I started out with nothing and i held on to it

09-08-2002, 11:29 AM	#6
justin PROJECT LO-LYF Join Date: Jul 2002 Location: MO. Posts: 283	Thanks for the helpfull hints! I will try them out tomarrow. As for today, I am couch bound to watch the RAMS A.K.A "GREATEST SHOW ON TURF" kick the snot out of the Broncos. __________________ FOUNDING MEMBER OF THE "O-SH*T, THAT TRUCK IS LOW" CLUB PROJECT: LO-LYF Bagged 68 Shorty home.att.net/~justin.lewis

09-09-2002, 05:51 PM	#7
vfrdude Registered User Join Date: May 2002 Location: Oakley, Ca. USA Posts: 137	Looks like the 'show' was cancelled yesterday.... __________________ Rudy Fierros '95 Honda VFR750F Used to have a '71 Chevy Stepside, Guards Red, Lowered 4" rear, 3" front, White Oak bed wood, 700R4 w/373 gears until some low life stole it!

09-09-2002, 06:21 PM	#8
justin PROJECT LO-LYF Join Date: Jul 2002 Location: MO. Posts: 283	YEA,YEA, That game was a big time joke! You ever heard of a payoff?ha-ha O well, It is a long season, and we prevail! Attached Images __________________ FOUNDING MEMBER OF THE "O-SH*T, THAT TRUCK IS LOW" CLUB PROJECT: LO-LYF Bagged 68 Shorty home.att.net/~justin.lewis

09-09-2002, 07:49 PM	#9
colohusker Registered User Join Date: Apr 2002 Location: Longmont, CO Posts: 436	Yep, thought for sure Griese was paid off to lose that game in the 3rd quarter! __________________ ------------------------------------------------ I say it's only money, my wife says it's only a truck.... '71 C10 Deluxe, factory ac, ps, pb, should be done by 2102 Longmont, CO husker95@hotmail.com

09-09-2002, 08:16 PM	#10
justin PROJECT LO-LYF Join Date: Jul 2002 Location: MO. Posts: 283	yea colohusker, he wasn't too hot in the 3rd but he stepped it up in the 4th! I grew up in Lakewood, CO. I am still a broncos fan but not when they are playing the RAMS. __________________ FOUNDING MEMBER OF THE "O-SH*T, THAT TRUCK IS LOW" CLUB PROJECT: LO-LYF Bagged 68 Shorty home.att.net/~justin.lewis

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