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Need help!! Why are my brakes sticking??

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Joshuatwatson View Drop Down
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    Posted: 21 Oct. 2011 at 3:11am
Ok.. So I've redone the brakes.. Everything is new except for the drums and they're in great shape and smooth inside!! My issue is that after you really mash on the brakes they stick and the the jeep won't roll unless you're in low range or REALLY ride the clutch in high range.. It doesn't do this every time though... It's worse after it's warmed up... And the wheels aren't hot after driving for a while.. I've adjusted the MC rod but that doesn't seem to be the problem.. When the brakes aren't stuck the wheels spin like they should with just a touch of drag.. But mash down on the brakes and they sometimes stick.. Any suggestions fellers??

FYI.. Front axle is original.. Back axle is a Dana 44

Thanks.. Josh
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bkreutz Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 3:16am
Have you checked the pivot point for the brake pedal arm?(if you move the brake pedal, does the clutch pedal move? they're on a common tube)  Rust can build up in there and cause all kinds of problems. 
Gale

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joshuatwatson Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 3:32am
I looked at it and it's clean.. It pivots perfectly..
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sudsie Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 9:49am

      

 
                 Did you put new brake hoses on the lines?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote F Bill Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 9:50am
How much free play is there in the master cylinder rod?   ANd what did you do with the master, rebuild, replace, ??
If you haven't checked out the tech FAQ section, go to:
http://www.thecj2apage.com/forums/tech-faq_forum57.html
for a lot of great stuff you need to know!!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote TERRY Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 10:21am
Heat expansion in contaminated brake fluid?
Push rod mis-adjusted?
Pressure relief port in MC clogged?
Weak return springs?
Do all 4 brakes hold up or just front or rear sets? If so look at the associated rubber hoses.
BOULDER 48 2A
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Post Options Post Options   Thanks (0) Thanks(0)   Quote F Bill Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 10:35am
Do you have a master cylinder heat shield? ANd when the brakes stick on , are your brake lights on as well?
If you haven't checked out the tech FAQ section, go to:
http://www.thecj2apage.com/forums/tech-faq_forum57.html
for a lot of great stuff you need to know!!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiverDownJames Quote  Post ReplyReply Direct Link To This Post Posted: 21 Oct. 2011 at 11:01am
Is the pedal returning all the way back to the correct position, and if you aren't sure, when they stick try slipping your foot underneath and pulling it with your toes.  I've run into this issue with my tractor, and with my brother's p.o.s. ford escort.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joshuatwatson Quote  Post ReplyReply Direct Link To This Post Posted: 23 Oct. 2011 at 3:44am
Well these damn brakes are still giving me fits!! I could understand if they stuck all the time but that don't!! And yes EVERYTHING is new.. And I've tinkered with the pushrod but still no luck.. And yes the peddle does return.. No the brake lights aren't on when they stick.

Any other ideas? They break free rather quickly but the drag really makes taking off a pain!! Can anyone point me in the direction of a good article on adjusting the brakes..front axle and brakes are stock rear is a Dana 44 with 11 inch drums and shoes...' Maybe im screwing up somehow..

Thanks!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Oilleaker1 Quote  Post ReplyReply Direct Link To This Post Posted: 23 Oct. 2011 at 11:07am
Another tip, I once honed a set of wheel cylinders out and re-built them with kits. The stone I honed them with left too coarse a surface so that the new cups would drag on the surface and the brake shoe return springs were not strong enough to release the shoes. I burned up the shoes before I got home. Were your wheel cylinders done this way, or all new? When they stick, is it all or just one?, a bad hose will not let the fluid go back to the master, I've been here too!LOL If you have 3/4 inch free play on the brake petal, your master should be returned all the way and not blocking the return hole for the fluid. When your brakes are locked, jack it up and turn the wheels. You will know. Expert again! John
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Old Boy Quote  Post ReplyReply Direct Link To This Post Posted: 24 Oct. 2011 at 2:54pm
Hi Josh, have you followed the procedure in the Mechanic's Manual? The shoes must be adjusted by turning the adjusters the correct way. I believe the brakes will stick on if the adjusters are turned the wrong way.
Looking at the rear of the back plate ( from the diff side ) the top left adjuster must turn anti clockwise, the top right clockwise, the bottom right anti clockwise and the bottom left clockwise.
Hope this helps.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joshuatwatson Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 9:49pm
It appears to just be the rear brakes (danna 44 with 11" brakes).. Any good articles on these??
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ralf Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 10:16pm
Josh,

If you have the early style 11" brakes from a pick up with cam adjustors, here is what they look like.  Notice the cam right above the clips on the inside view.  On the back view you can see the adjustor end of the cam that you turn to adjust.  I think there is a little arrow to show which way to  turn




Edited by ralf - 25 Oct. 2011 at 10:22pm
1946 CJ2A Column Shift #14575

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1948 CJ2A

1982 J10 Pickup

1989YJ Wrangler

1999 WJ Grand Cherokee

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Post Options Post Options   Thanks (0) Thanks(0)   Quote ralf Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 10:24pm
Here you can clearly see both cams and how they are oriented.


1946 CJ2A Column Shift #14575

1947 CJ2A

1948 CJ2A

1982 J10 Pickup

1989YJ Wrangler

1999 WJ Grand Cherokee

1953 Ford NAA Golden Jubilee Tractor

1957 Farmall Cub Low Boy tractor
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiverDownJames Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 10:25pm
Pop off the drums and take a picture, a picture is worth 1000 posts.  PM me it if necessary, I've worked on a few 44's and I might be able to spot the issue.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joshuatwatson Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 11:09pm
Well.. I tried to pop off the drums... Bahahhahahahahahahaah!! This sh*t is driving me CRAZY!!! They are tighter than a virgins... Well you get the point!! I'll have to borrow a puller tomorrow! I did notice that I could still turn the passenger rear wheel when they stick.. But it is noticeably harder.. The drivers side rear will not budge! I don't know what's up with that!! Oh and to top things off my little adjusters are looking pretty grim.. They look awfully rusty.. But I've got them soaking in some PB blaster. I think I'm going to name my jeep.. "baby ass"..... Because shut just keeps come'n!!! Thanks guys I'll report back tomorrow with pics!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiverDownJames Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 11:10pm
I'd be willing to bet that your adjusters are the issue.  Might just want to consider replacing them.  I'd bet they are cheap as can be.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joshuatwatson Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct. 2011 at 11:10pm
Oh and by the way.. The brakes were working pretty good before it sat at the mechanics for 3 months!!! In fact they were the only damn thing that were working right!!
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