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post #1 of (permalink) Old 01-26-2004, 01:14 PM Thread Starter
 
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cant get 82 cj to stop

Just put an 82 cj 7 on the road. It just does not seem to stop right. Brakes do not feel like they "grab". Have to "stand" on them to stop at highway speed. Can't get them to lock up at any speed. Replaced the master, pads and shoes. Booster seems to work as well as prop. valve. Bleed them a few times with no change. Did not have it running when bleeding. But dont know if this matters. Little pin on the end of prop. valve moves out when brakes are applied. Ped. sinks when engine is started, so booster is doing its job. Did not cut drums or rotors. No shake or chatter, just a weak feeling. Checked calipers and they move freely. Wheel cyls in rear also free. Rear shoes are adjusted. Running 33 12.50's. Ran this set-up on all my CJ's with no probs. Did a brake search with no answers.Any Help??? Thanks Vinny
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post #2 of (permalink) Old 01-26-2004, 07:19 PM
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Re: cant get 82 cj to stop

Hard to beat the feeling of brakes that don't work, kinda like a nightmare while you are awake.

Looks like you have covered most to the bases.

Is the peddle soft and bottoms out until you pump it a time or two? If so there is still some air in there. The front bleeds easy normally but the back can be a pain. Try bleeding with the rear jacked up about 18" higher than the front.

If the peddle is hard and just won't put umf to the breaks then maybe a blocked line (could be crushed) or maybe that new master is simply bum. Guess it could be other things but I would start there.

Good luck.
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post #3 of (permalink) Old 01-26-2004, 07:39 PM
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Re: cant get 82 cj to stop

Are the pistons in the calipers froze?
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post #4 of (permalink) Old 01-27-2004, 11:33 AM Thread Starter
 
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Re: cant get 82 cj to stop

Front cals. seem to work fine, not frozen. Pedal seems soft. Will try to jack up rear and bleed. Cant get any air out with it on the ground. Does it need to be running to bleed power brakes?? I did not think so, but never heard of lifting up the rear either. Thanks
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post #5 of (permalink) Old 01-27-2004, 04:13 PM
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Re: cant get 82 cj to stop

Hmmm...I know what its like...

I have an 82 CJ7 with 33x12.5's on it. Its got 1pc axles and lockers front and rear if that makes any difference. Ive tried everything i know of and my brakes...well...suck. I have to press them very hard to get them to work and they wont ever lock up. Ive tried rotors and pads, new stainless lines, checked just about everything. I just dont know. If you find out the problem PLEASE let me know ([email protected]) and if i figure anything out ill do the same.


By the way [img]images/graemlins/goodpost.gif[/img]



post #6 of (permalink) Old 01-27-2004, 04:18 PM
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Re: cant get 82 cj to stop

Check to see if the brakes are glazed. Take the pads off and sand them with some fine sandpaper and also hit the rotors. Then break them in gently.
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post #7 of (permalink) Old 01-27-2004, 05:55 PM
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Re: cant get 82 cj to stop

</font><blockquote><font class="small">In reply to:</font><hr />
Does it need to be running to bleed power brakes??

[/ QUOTE ]

I never start the motor and have never known anyone that did. I would think that it would be much harder to control the peddle. Maybe there's some advantage??
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post #8 of (permalink) Old 01-27-2004, 08:09 PM
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Re: cant get 82 cj to stop

We just finsished bleeding mine. We tried it with the engine off and on. Same results but the fluid squirts out faster with the engine on. Still no braking power... this is frustrating...
post #9 of (permalink) Old 01-27-2004, 09:05 PM
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Re: cant get 82 cj to stop

I'm just guessing here, can't see the fluid squirt or feel the peddle. But my guess is that Vinny and 304CJ7 have very different problems.

While Vinny is working on his.... 304CJ7 has a hard peddle and still can't get braking action.

I'm a bit reluctant to bring up this discussion, take much of it as a rant, but some important points were made about proporting valves (and then there was just some crazy stuff).

Please Read This

So 304CJ7 is it true that you have a hard peddle as soon as you step on it? No double pumping required?

Double duty thread hehe
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post #10 of (permalink) Old 01-28-2004, 07:08 PM
 
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Re: cant get 82 cj to stop

Hey, I know the feeling. I have a very similar problem that has been ongoing for months now. I have rear disc but other than that is seems very similar to your problem. I have not had any success yet either. Everything in the braking system is new, calipars, rotors, pads, lines, New corvette MC, and now I just bypassed the proportioning valve for the rear line. It was working good the night I did the bypass, but now it is not working again. My jeep has a hard pedal that will not "pump" up. I'll let you know if I make any progress.
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