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Old 06-17-2014, 07:06 AM
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brakes went soft

Hey guys, as I was heading home yesterday my brake pedal went soft on me. I have a big meeting up in Indy tomorrow so I will be bleeding them after work today to see if that does it. Is there anything else I should look at that could have caused it?

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Old 06-17-2014, 07:16 AM   #2
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loose line, cut in line etc..

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Old 06-17-2014, 07:18 AM   #3
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Wheel cylinder check to see if there's a leak
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Old 06-17-2014, 10:24 AM   #4
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Quote:
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loose line, cut in line etc..
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Wheel cylinder check to see if there's a leak
Both things to check. The wheel cylinders in the rear drums will go out on you cause a leak/soft pedal. The good news is that they're cheap and fairly easy to swap (assuming the brake line comes off the back). I would put my money on wheel cylinder or a leak in one of the hard lines due to rust. Good Luck!

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Old 06-17-2014, 12:15 PM   #5
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Agree with all the others. If you have no visible leak, replace the master cylinder. They can bypass internally with no leak or could be leaking into the booster. As stated earlier, usually the rear wheel cylinders are the first to go.
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Old 06-17-2014, 02:41 PM   #6
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Is it a soft pedal, but with the same travel? Have you added brake fluid lately? Are you by chance using DOT5 silicone fluid?

Standard DOT 3 fluid will absorb water and if you don't bleed them often you deal with rusty cylinders etc.
Silicon fluid will not absorb water but float on it leaving water in the lowest point, cylinders & calipers where on hard braking/high temperatures it will boil leaving you with a soft cushy pedal.

Do a safety check of all wheels for leaks etc. Check master cylinder, bleed out fluid and replace. My preference is old fashioned DOT 3.
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Old 06-17-2014, 08:21 PM
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Thanks much guys, got it bled, no visible leaks. Seems like just a bubble. No clue what exactly the fluid was that the PO had in there but what was left wasn't pretty. I haven't had this one for that long so let's hope it was just needing some TLC.
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Old 06-17-2014, 09:56 PM   #8
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When you get an opportunity, you may want to consider flushing the system. Majnoon made that recommendation to me and I followed thru, ran about 3 quarts through it, and got my brakes back. Jeep always had a good pedal but wouldn't stop worth a crap for nearly 4 years. Then the pedal got a little soft but not bad. Was well worth the time.
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Old 06-18-2014, 08:47 PM
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When you get an opportunity, you may want to consider flushing the system. Majnoon made that recommendation to me and I followed thru, ran about 3 quarts through it, and got my brakes back. Jeep always had a good pedal but wouldn't stop worth a crap for nearly 4 years. Then the pedal got a little soft but not bad. Was well worth the time.
Went ahead and did this, by myself which I do NOT recommend. But she stops on a dime now! Thanks again!
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Old 06-18-2014, 10:16 PM   #10
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Glad you have good brakes again. I never would have thought it because my fluid didn't look bad but it sure made a difference.

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