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Unread 05-31-2013, 10:53 PM   #1
caseypotts
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1980 CJ7 
 
Join Date: Nov 2003
Location: , Washington
Posts: 160
Brake questions

Two questions... I've been struggling with break issues since putting a ton of work into my CJ. Prior to the work it had mostly been sitting for about 3 years.
I did NOT have any issues until I changed out my front lines. The do not appear to be leaking. I bled and bled and then bled some more and never maintained pressure. I came to the conclusion that my problem was the master cylinder and bought a reman master cylinder. It is now leaking between the master and the booster. Is this a bad master cylinder?
Second question. My brake light is always on in the speedo. I'm not sure the above is connected. Is there an adjustment on the parking brake that I am missing?

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1980 CJ7 GM151 Bored out, Flat Top Pistons, Hedman Header, 2.5in Superlift springs, Extrem Shocks' 31 10.5 Mastercraft Courser MT tires on Allied MockLoc rims, Blazer heater upgrade.

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Unread 05-31-2013, 11:58 PM   #2
RenoF250
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1985 CJ7 
 
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Quote:
Originally Posted by caseypotts View Post
Two questions... I've been struggling with break issues since putting a ton of work into my CJ. Prior to the work it had mostly been sitting for about 3 years.
I did NOT have any issues until I changed out my front lines. The do not appear to be leaking. I bled and bled and then bled some more and never maintained pressure. I came to the conclusion that my problem was the master cylinder and bought a reman master cylinder. It is now leaking between the master and the booster. Is this a bad master cylinder?
Second question. My brake light is always on in the speedo. I'm not sure the above is connected. Is there an adjustment on the parking brake that I am missing?
Yes, it should not be leaking there. Did you possibly damage when installing?

How were you bleeding the original MC?

I have the light problem also, there is a wire on the back of the emergency brake pedal that is pretty hokey. My is usually on but flickers, I just ignore it, I have bigger problems to deal with on it.
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Unread 07-15-2013, 09:58 AM   #3
Jsadamson1
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Location: Munford, Tennessee
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On the late 70's cj and newer, I believe there is a sensor on the brake pressure divider block that will also trip the brake light if there is air in the line. I remember reading about it when I was doing my rear brakes the other day.
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Unread 07-15-2013, 11:09 PM   #4
caseypotts
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1980 CJ7 
 
Join Date: Nov 2003
Location: , Washington
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Sorry meant to respond back to this a got busy with other things. Thanks for the responses, I still have the same issues going on as I haven't had time to work on it the past couple weeks but I think...I think I have found my air issue. I bled the m.c. per the instructions. I'm thinking maybe there is remaining air in it and now that I solved my leak problem I just need to bleed the system again. With any luck my brakes will work and that damn light will go off. Then I can move on to my next problem
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1980 CJ7 GM151 Bored out, Flat Top Pistons, Hedman Header, 2.5in Superlift springs, Extrem Shocks' 31 10.5 Mastercraft Courser MT tires on Allied MockLoc rims, Blazer heater upgrade.

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2003 Liberty Renegade
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Unread 07-16-2013, 03:53 AM   #5
BagusJeep
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Are you holding back the Combination Valve???

Are you following the bleeding procedure in the FSM?

Have you taken the front calipers off, because you can swap them and not realise the bleed nipples are upside down and it will not bleed out all the air.
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