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Alaska TJ 10-03-2011 12:49 PM

Brake line fitting failure
Applied my brakes last night and the Jeep started beeping and the Emergency brake light started to flash at me. Pulled over and saw that the brake fluid was low. Looked under the Jeep and saw that the rear passenger steel brake line had a link. When pressure is applied to the brake pedal, brake fluid shoots out of the brake line fitting that leads the steel brake line into metal brake block that sits on the rear axle near the rear axle vent hose.

I believe that I need to replace my steel brake line and fitting, but any thoughts on why it would have failed? What would cause these symptoms? The brake line looks to be in good shape (i.e. it is not rusted at all).


2004 Jeep Wrangler X 4.0 Dana 35 Rear; Dana 30 Front

02tjmt 10-03-2011 07:40 PM

try tightening it first. did you do the brake line and possibly put the wrong flare on it? ive seen it numerous times

AtcoTrailsINC 10-03-2011 08:03 PM

i agree with him ^^ try tightening it first. If that doesn't work take it apart and make sure its flared properly. could be failing if someone installed a new brake line and didn't flare it properly. I forget if Jeep uses a double flare or an ISO "bubble" flare.

Alaska TJ 10-03-2011 10:42 PM

Yes, the first thing that I did was to try tightening it... That wasn't the problem though. There has been no recent (at least 1.5 years) work on anything near the brake line or fittings, either. I removed the brake line and drove to NAPA (using emergency brake to stop), bought a replacement (fittings preinstalled, 3/16" x 30"; $7.15), installed it, and bled the brake system. It's fixed now, but I'd like to know why it failed. Inspection of the part didn't really shed any light on the situation. There were a lot of fitting options at NAPA. I think that the right one was labeled 3/16x 30" x p30.

O'Reillys lends out the brake line flaring tool, if you want to try that. I also tried to cut just the offending end off to reflare and use the existing fittings. Unfortunately their tool was out of square and wouldn't put a good flare on the end of the stock brake line.

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