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Old 12-14-2009, 04:33 PM   #1
USAFChief's Avatar
Join Date: Dec 2009
Posts: 22
YJ Brake Problem

Ok, had a problem with the carb and had it overhauled after installing the carb, I started the Jeep up to adjusted the carb.

When I went to take the Jeep out on a test drive and when I backed out of my garage my brake pedal went to the floor.

I now have fluid coming from the left hand front side near the frame of the Jeep between the front L/H wheel and the drivers door. Not from the caliper.

The front reservoir setion of the master cyliner is empty and no fluid on any of the lines coming off the master cylinder.

Where should I start looking on the jeep? Any ideas of what it could be before I crawl under the Jeep, I hope it's just a flexable line.

Thanks in advance.

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Old 12-14-2009, 05:52 PM   #2
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Join Date: Oct 2009
Location: Morrisville, PA
Posts: 1,165
Brake line. It could be disconected, or it could be broken. Mine exploded on me from corrosion. The liquid ice melter they spray on the streets here is brutal. I started it, pressed the brake and BANG! Next thing I knew the pedal went to the floor and there was smoke coming from under the hood. dortunately for me, the engine was relatively cool, or I would have had a nice fire under there.

Chase the line from either end until you find the source of the leak. Given that it's leaking down at the frame up front, I'd start at the wheel cylinder and work up from there.

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Old 01-28-2010, 11:07 PM   #3
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Posts: 22
Had the same problem the RedWrangler had. Corrioded brake line blew.Had them all replaced. But looks like I will eventuly need to replace the clutch master cylinder line and the line going to the slave cylinder, but only when my clutch goes out.
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Old 01-28-2010, 11:23 PM   #4
Join Date: Jan 2009
Location: Factoryville, PA
Posts: 383
Just for something to look at..I don't know if the carbed ones are the same way, but the later model YJ's have a single sealed unit for the mastercylinder, the hose, and the slave cylinder..it's all one part, that doesn't get taken apart. Yours might be different, but it's just something to look at. And yeah...My lines did the same thing on when I was troubleshooting another brake problem in juneish.
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Old 01-29-2010, 11:40 AM   #5
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Join Date: May 2008
Location: Louisville, KY
Posts: 53
Definitely the brake line- not uncommon where it runs along the frame. I did mine last year- corroded through. You exert a great deal of force through those lines- more than most people realize. But brake lines can be a pain to bend correctly- just take your time.
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