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Brake Master Cylinder Half-empty

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Old 10-24-2021, 01:05 PM
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Year: 1992
Model: Cherokee (XJ)
Engine: 4.0
Default Brake Master Cylinder Half-empty

I noticed the brake pedal travel increasing and now I find no brake fluid in the forward part of the master cylinder reservoir. Is the 1992 Cherokee brake system split front/back or is it setup up diagonally? I need to know where to begin looking for the lost fluid

! Thank you.
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jmrec100 (08-05-2022)
Old 10-24-2021, 03:42 PM
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Year: 2001
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It looks like it is set up front to back . check your rear brakes for leaks .
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BlueRidgeMark (10-24-2021), jmrec100 (08-05-2022), letsgomuddin (10-24-2021)
Old 10-24-2021, 03:52 PM
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You should be looking at it as half full, not half empty!



Yep, you gots leaks.
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IJM (10-24-2021)
Old 10-24-2021, 06:39 PM
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Probably a bad wheel cylinder, very common. If one is bad, do em both. if the shoes are contaminated, change them. Check your axleshaft seals while you are in there.
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Old 08-05-2022, 10:35 AM
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Year: 1994
Model: Cherokee
Engine: 4.0L, In Line 6
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I have similar issue. Since this is an older post, I would start a new post but couldn't find where to do it.
Here's my similar situation. I have a 1994 Cherokee. The smaller reservoir, front, is almost empty. Is that the rear brakes? I did a drum brake job and it looked ok. My Jeep sat a bit. Had new engine mounts done. Then went to drive it, the pedal went to the floor. I suspect, bad REAR wheel cylinders. Most likely the rear if the smaller reservoir goes to the rear. Is the smaller reservoir towards the front of the Jeep for the rear brakes?

The brake fluid looked rather blackish. What is the best way to drain and purge the lines. I can use a turkey baster and empty the reservoir. Then could fill it , and open the wheel cylinders one at a time and flush thru it?
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Last edited by jmrec100; 08-05-2022 at 10:54 AM.
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