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Old 10-10-2013, 07:58 PM   #1
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New brakes question

87 2.5l. First time doing brakes. Installed whole new rear....drums, shoes, cylinders, and springs. Have a few questions.

1. Is it normal to have a slight rub with new shoes AND new drums? I checked and quadruple checked to make sure everything is seated right. Greased the backing plate. The star wheel is backed all the way off and is loose so I know it's not pushing the shoes out. Just one side has a slight rub. When I rotate the tire (jacked up) it will rub about halfway through one rotation. Just enough to slow it down. After driving the rim is a little warmer than the others but not too hot. I am hoping it will just wear off.

2. Is there a trick to get the emergency brake back to working? I think maybe the star wheel is too loose. I used a brake kit by Omix Ada but the drums would not go on flush so I got some Duralasts and they fit right. So I had to use the old drums until I got the Duralast. Anyway, the ebrake didn't work at first after installing the old drums but then the next day it miraculously started working. Then I put on the new drums and the ebrake stopped working again.

3. I think my front brakes don't work at all. After completing the rear end I had barely and I mean barely any brakes at all until I bled them. I bled the front too. Is that normal? I have brakes now but not as good as they should be. I guess my next project will be front brakes. Lovely.

Thanks in advance.

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Old 10-10-2013, 08:30 PM   #2
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Quote:
Originally Posted by JJYJ View Post
87 2.5l. First time doing brakes. Installed whole new rear....drums, shoes, cylinders, and springs. Have a few questions. 1. Is it normal to have a slight rub with new shoes AND new drums? I checked and quadruple checked to make sure everything is seated right. Greased the backing plate. The star wheel is backed all the way off and is loose so I know it's not pushing the shoes out. Just one side has a slight rub. When I rotate the tire (jacked up) it will rub about halfway through one rotation. Just enough to slow it down. After driving the rim is a little warmer than the others but not too hot. I am hoping it will just wear off. 2. Is there a trick to get the emergency brake back to working? I think maybe the star wheel is too loose. I used a brake kit by Omix Ada but the drums would not go on flush so I got some Duralasts and they fit right. So I had to use the old drums until I got the Duralast. Anyway, the ebrake didn't work at first after installing the old drums but then the next day it miraculously started working. Then I put on the new drums and the ebrake stopped working again. 3. I think my front brakes don't work at all. After completing the rear end I had barely and I mean barely any brakes at all until I bled them. I bled the front too. Is that normal? I have brakes now but not as good as they should be. I guess my next project will be front brakes. Lovely. Thanks in advance.
The drums should rub a bit, but not drag. If you can spin them by hand, you should be ok. It will take some time for the shoes wear to the shape of the drum. The e brake can be adjusted. There should be an adjustment under the jeep. You should see a cable connected to a bracket that connects to two cables. There is an adjustment screw on the bracket. That is how you adjust the e brake. YMMV. Photo is from my 91. You can see how much I had to adjust to get the e brake working properly.

Silly question, but did you refill the master cylinder after bleeding?

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Old 10-10-2013, 10:23 PM   #3
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When you get air into the system anywhere it will seriously degrade the performance so installing new rears and not bleeding them will lead to significant braking performance concerns. If once you have removed the air by bleeding the system your brake performance is sub-par double check your front brake system, rear brake adjustment, and bleed all again before you start replacing front brake parts (unless of course inspection shows that they need replacement).
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Old 10-10-2013, 10:30 PM   #4
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Thanks for the info! Yes, the master cylinder is full. I bled it the old fashion way because I didn't have a small hose and bottle. I plan on doing it again. So does the star adjuster not really affect the ebrake? My other wheel didn't seem to rub at all. It rubbed some without the wheel on but once I put the wheel on it stopped. Does that mean I need to adjust the shoes out a little? Give it a little rub? The brakes didn't seem to pull left or right so I am assuming they are both working right.
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Old 10-11-2013, 12:20 AM   #5
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Yes until it just barely contacts. But more important is the adjustment if the cable where both tears hit the main cable.
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Old 10-11-2013, 10:05 AM   #6
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Jokerchief, are you referring to the cables in Tigwizard's photo?
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Old 10-11-2013, 10:08 AM   #7
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It is my understanding that the star wheel keeps the brake shoes adjusted in the drum. It is activated when you back up. The e-brake adjustment is as Tig discribed, it should be on the drivers side in front of the rear wheel. When bleeding the brakes,
start at the right rear wheel, then left rear, right front, left front, that is the order you should bleed. Furtherest from the MC to the closest.
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Old 10-11-2013, 10:41 AM   #8
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CMike, I bled them in that order. I think I just need to do it again. Isn't the star wheel used to adjust the shoes out as they wear? And with new shoes and new drums it would be adjusted all they in?
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Old 10-11-2013, 05:45 PM   #9
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Yes the star wheel is activated to adjust in two ways. When y9ou apply the brakes in reverse they are supposed to try and move the star wheel. They are also manually activated through the access hole in the backing plate for you to adjust the brakes.

When adjusting the drum brakes I was taught to adjust to the point you could get just the slightest friction.

On the parking brake you need to adjust and the FSM says until there is tension on the forward cable. I actually do it by how the e brake lever engages. I don't like it o be all the way at the top meaning in the first one or two clicks. I like mine at about a third to halfway. Good and solid so I know it is really set when I stop on a hill and don't want to roll back.
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Old 10-11-2013, 06:18 PM   #10
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X2 what Joker said.
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Old 10-26-2013, 11:25 AM   #11
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Finally got around to working on my brakes again. Yanked the rear tires and drums off again. Greased up the star wheel (forgot to before), replaced, then adjusted it until it was firmly touching the shoes. I had it backed off so far that it was loose and I think that is why my ebrake didn't work. Adjusted the shoes for a slight rub on the drums. Put it all back together then I flushed and bled the system. Brakes work better than ever but I still have to occasionally give a little pump so I guess there is still a little air in it. Ebrake works at about half way down.

I checked the brake fluid the next day and the front is already turning darker. It was brown and nasty before the flush. The back brakes weren't that bad.

Hope this helps the next guy.

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