73 GMC C2500 Right Front Brake Not Working - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Martin64 · 06-01-2013, 02:33 PM

My sons trucks brakes haven't worked well since we bought it a year or so ago. The rear brakes would lock and nothing (or nearly nothing) on the front. Bled the brakes, checked the shoes. Worked ok for about a week and now back to zero. Just changed front calipers thinking piston seals were bad. Back to zero. No brake pressure getting to passenger side front caliper. Could not get fluid out of the bleed valve.
Drivers side has plenty of pressure. When we bled it, it had full flow and great pressure.

Any thoughts?

Martin64 · 06-01-2013, 02:49 PM

Thinking "MityVac" could pull the fluid to the caliper?

donut · 06-01-2013, 08:56 PM

How old are the rubber lines?
They can be a PITA to change, but if it's cracked open, you can judge how far fluid is traveling. If the insides of the rubber are collapsing, it could be your problem. Not saying it is, but could be.

I've been burned by the bad rubber lines a couple of times. Now I don't do a caliper without changing them.

meatwagon83 · 06-01-2013, 10:53 PM

your rubber lines are collapsing, replace them and you should be golden

06-01-2013, 02:33 PM	#1
Martin64 Registered User Join Date: Oct 2003 Location: Yuma, Az Posts: 477	73 GMC C2500 Right Front Brake Not Working My sons trucks brakes haven't worked well since we bought it a year or so ago. The rear brakes would lock and nothing (or nearly nothing) on the front. Bled the brakes, checked the shoes. Worked ok for about a week and now back to zero. Just changed front calipers thinking piston seals were bad. Back to zero. No brake pressure getting to passenger side front caliper. Could not get fluid out of the bleed valve. Drivers side has plenty of pressure. When we bled it, it had full flow and great pressure. Any thoughts? __________________ Martin Gibson USAF Retired 1964(-ish) C10

06-01-2013, 02:49 PM	#2
Martin64 Registered User Join Date: Oct 2003 Location: Yuma, Az Posts: 477	Re: 73 GMC C2500 Right Front Brake Not Working Thinking "MityVac" could pull the fluid to the caliper? __________________ Martin Gibson USAF Retired 1964(-ish) C10

06-01-2013, 08:56 PM	#3
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: 73 GMC C2500 Right Front Brake Not Working How old are the rubber lines? They can be a PITA to change, but if it's cracked open, you can judge how far fluid is traveling. If the insides of the rubber are collapsing, it could be your problem. Not saying it is, but could be. I've been burned by the bad rubber lines a couple of times. Now I don't do a caliper without changing them. __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

06-01-2013, 10:53 PM	#4
meatwagon83 Registered User Join Date: Dec 2012 Location: Preble county ohio Posts: 1,914	Re: 73 GMC C2500 Right Front Brake Not Working your rubber lines are collapsing, replace them and you should be golden __________________ "DON'T TOUCH THE TRIM!!"-Early Kyler



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