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Unread 08-13-2013, 09:16 PM   #1
Jsdtm
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1986 CJ7 
 
Join Date: Aug 2013
Location: Longwood, Fl
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Stiff brakes

Hi all. I am new to the forum and new to cj's. I recently purchased an 86 CJ 7 4.2 inline 6 automatic and my brakes are stiff and I have to mash them down HARD to get my jeep to stop. I don't have any leaks in my lines and I don't have the 8" disk on my MC, which from reading many posts I don't have a power booster. Is my MC bad in this case or anything else may be causing this? Any help would be appreciated. I have disc brakes in the front and drums in the back My jeep does not pull to any side when I mash the brakes just stiff as hell Thank you.

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Unread 08-13-2013, 09:37 PM   #2
walkerhoundvm
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Welcome to the forum!! I'd be wondering if it just isn't a normal CJ braking system - you have manual brakes so it's not unheard of to have to press pretty dang hard to come to a complete stop.

To rule it out, you'll probably have to take a closer look at your brakes - everything from the pads to the rotor to the calipers. If all of that looks to be in good order, next step is to bleed the brakes, starting from those furthest from the MC (passenger rear) to those closest (drivers front) to make sure there aren't any air bubbles in the lines. Obviously make sure there's enough brake fluid in the MC. After that I'd worry about your master cylinder, unless there's obvious signs of leaking around the firewall mount.
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Unread 08-14-2013, 05:29 AM   #3
Jsdtm
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Ok thanks for the help. I will check all these out and post back. Thanks again!
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Unread 08-14-2013, 07:24 AM   #4
Redmanchew
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another quick question is what size tires are you running? Bigger tires/wheels will slow the whole procedure down.
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Unread 08-14-2013, 07:40 AM   #5
WindKnot
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Has it been awhile since you've driven a vehicle without power brakes? Just about everything now days has them.

There is quite a difference between them. They CAN be converted.
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Unread 08-14-2013, 07:50 AM   #6
hotrod351
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agree, after bleeding and adjusting the brakes make sure you have the right master cylinder. i had a similar problem with a old bronco wrong MC made me really push down hard on the pedal to stop.
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Unread 08-14-2013, 03:00 PM   #7
Jsdtm
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I have 33x12.50r15s. I haven't ever driven a car without power breaks. The closest I've come is my 41 ford tractor and now that I think about it it's about the same. Haha. How do I know if the MC is the correct one? Doesn't look like I can get to working on it until the weekend. Darn Florida daily rain!
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Unread 08-20-2013, 07:07 PM   #8
Jsdtm
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Update: I bled the brakes and they are fine now. Thanks y'all
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