B-body brake question? - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer B-body brake question?

Print Thread

B-body brake question? #697956 05/14/10 07:35 PM 05/14/10 07:35 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	I need help with brake question. I'm having problem with rear brakes sticking on my car.(everything is new) except poportioning valve and hold off block?(I think thats close to its name) but anyway I can break loose either bleeder on whl cyl and you can hear both sides let loose and as soon as you hit the brakes again pow locked up again, Have vacuumed bled and still locking up. What does the hold off block do? Please help......

Re: B-body brake question? [Re: mc4406] #697957 05/14/10 07:39 PM 05/14/10 07:39 PM
Joined: Oct 2004 Posts: 601 Clintwood VA johnedod mopar
johnedod mopar Joined: Oct 2004 Posts: 601 Clintwood VA	I'd check the rubber line going to the tee on the rearend. They can deteriorate from the inside out. Johnedod 68 Road Runner 71 Road Runner 78 Power Wagon

Re: B-body brake question? [Re: mc4406] #697958 05/14/10 07:39 PM 05/14/10 07:39 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	Manual brakes? How much free play at the pedal? Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: johnedod] #697959 05/14/10 07:40 PM 05/14/10 07:40 PM
Joined: Oct 2004 Posts: 601 Clintwood VA johnedod mopar
johnedod mopar Joined: Oct 2004 Posts: 601 Clintwood VA	Sorry I missed the "everything is new" part. Johnedod 68 Road Runner 71 Road Runner 78 Power Wagon

Re: B-body brake question? [Re: HealthServices] #697960 05/14/10 07:41 PM 05/14/10 07:41 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	After the brakes lock up remove the bolts that hold the master to the booster or the firewall. Do the brakes release? Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: HealthServices] #697961 05/14/10 07:41 PM 05/14/10 07:41 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	Sorry it's pwr disc and rear drum, and all hoses are new. I even replaced the tee with another. How do you measure free play?

Re: B-body brake question? [Re: mc4406] #697962 05/14/10 07:43 PM 05/14/10 07:43 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	Allen, I'll go try it real quick, i'll be right back

Re: B-body brake question? [Re: mc4406] #697963 05/14/10 07:44 PM 05/14/10 07:44 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	I'm suspecting the rod in the master is not fully retracting. This will not allow the fluid to return to the reservior. Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: HealthServices] #697964 05/14/10 07:47 PM 05/14/10 07:47 PM
Joined: Apr 2003 Posts: 512 Sacramento, CA B Bdrainy mopar
Bdrainy mopar B Joined: Apr 2003 Posts: 512 Sacramento, CA	I had a similar problem with mine (except it was the front wheels that were locking up) Ended up being the MC. Swapped it out with another that I had and I was good to go.

Re: B-body brake question? [Re: Bdrainy] #697965 05/14/10 07:51 PM 05/14/10 07:51 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	I just loosend the MC and it did not release pressure. The MC is new(Napa) maybe got a bad one?

Re: B-body brake question? [Re: mc4406] #697966 05/14/10 07:53 PM 05/14/10 07:53 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	If you lossen the fitting at the master for the rear line and the brakes release now, I would suspect it to be a bad master. Of course if the rear brakes are still locked up after doing this, I would suspect it to be something else. Last edited by HealthServices; 05/14/10 07:55 PM. Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: mc4406] #697967 05/14/10 07:56 PM 05/14/10 07:56 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	I also tried to do a reverse bleed by pushing fluid through system by attaching to one of the rear cyl bleeder and when i opended and tried to push fluid through it would not go through but felt like alot of back pressure when i was trying to push it through. Should i remove MC and make sure rod is not jammed??

Re: B-body brake question? [Re: mc4406] #697968 05/14/10 07:59 PM 05/14/10 07:59 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	You loosen (removed) the master nuts holding the master to the booster. This should release the interference if there is any. Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: HealthServices] #697969 05/14/10 08:05 PM 05/14/10 08:05 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	So what happen when you lossen the fitting at the master for the rear brakes? You will have to a least hand thread the nuts so the master won't move when you break the line free. Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: HealthServices] #697970 05/14/10 08:13 PM 05/14/10 08:13 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	Allen, I might have found it, The MC line i loosend and nothing. So i moved to the first thing moving from rear to front which is the hold off valve loosend line on the front side MC side nothing move to back side and wham brakes released..So it looks like it can be taken apart from bottom?? Can it be taken apart and cleaned?

Re: B-body brake question? [Re: mc4406] #697971 05/14/10 08:17 PM 05/14/10 08:17 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	I have never done it, but I've heard that you can do it. Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: HealthServices] #697972 05/14/10 08:21 PM 05/14/10 08:21 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	me either, maybe it's just like poporotioning valve? Spring and ball?? Not sure but after supper I'm going to go pull it apart and see what it consists of.

Re: B-body brake question? [Re: mc4406] #697973 05/14/10 08:23 PM 05/14/10 08:23 PM
Joined: Dec 2007 Posts: 7,759 So Cal HealthServices Why would you even post that?
HealthServices Why would you even post that? Joined: Dec 2007 Posts: 7,759 So Cal	Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.

Re: B-body brake question? [Re: HealthServices] #697974 05/14/10 10:35 PM 05/14/10 10:35 PM
Joined: Oct 2005 Posts: 90 Central, Indiana M mc4406 OP member
mc4406 OP member M Joined: Oct 2005 Posts: 90 Central, Indiana	Allen, I removed the block tried taking it apart (decided not to) anyway cleaned it out. It's like a pressure type valve anyway after cleaning and re-installing it. It started car back up and forward and NO locking rear, Knock on wood I think it might be fixed. I got to take it for a alignment tommorrow so i'll but it to the real test, Thanks to everyone for their Input.

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1