Grease in rear break assembly - JeepForum.com
 
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post #1 of 8 Old 01-29-2013, 11:26 PM Thread Starter
Renegade578
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1981 CJ7 
 
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Grease in rear break assembly

I noticed brake fluid leaking on my right rear tire, so I assumed I had a bad wheel cylinder. I removed the drum to take a look and found the entire brake assembly covered in grease. I'm attaching a few pictures. I also found several broken springs. I can't figure out where all this grease came from. I removed all everything to inspect the axle bearing and it looks to be okay. I have 2 theories. One, someone thought the bleeder valve was a grease nipple and pumped the the full of grease. Two, the PO was too lazy to fix the rear brakes so he covered everything with grease since the rear brakes only do about 20% of the braking anyway. Any other ideas?

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post #2 of 8 Old 01-30-2013, 12:00 AM
roboto65
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Not grease most likely, gonna say you are right and it is brake fluid that has mixed up with the dust and created what looks like grease but is not. The wheel cylinder is probably shot and thats what is causing that.

They say money can't buy happiness but it can buy Jeep parts...and Jeep parts make me really Happy.
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post #3 of 8 Old 01-30-2013, 01:14 AM
82JeepCJ7
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Been there, done that. Inner seal was leaking.






(Axle is an AMC 20 rear with a Warn full float kit)

Beat it to fit, paint it to match!

Wheel, Wrench, Repeat.
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post #4 of 8 Old 01-30-2013, 09:43 AM Thread Starter
Renegade578
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Quote:
Originally Posted by 82JeepCJ7
Been there, done that. Inner seal was leaking.

(Axle is an AMC 20 rear with a Warn full float kit)
That is definitely a possibility. It did smell a little like gear oil. I don't think it is just brake fluid mixed with dust. It is thick and really feels like grease, so I could see it being gear oil mixed with dust. So I will have to remove the axle shaft to replace the inner seal right? Is it necessary to replace the axle bearing while I have it out? I don't have access to a press and my budget is limited with a baby on the way
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post #5 of 8 Old 01-30-2013, 11:22 AM
Coiz
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Your brake shoes are on the wrong sides, they should be swapped front to back. The shoe with the longer friction material should always be toward the rear of the vehicle like in your second "greasy" picture.

Quote:
Originally Posted by 82JeepCJ7 View Post

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post #6 of 8 Old 01-30-2013, 01:03 PM
82JeepCJ7
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Yea, I noticed that as well and corrected it after I took the picture.

Beat it to fit, paint it to match!

Wheel, Wrench, Repeat.
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post #7 of 8 Old 01-30-2013, 04:34 PM
cj5huntingrig
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Bad seal. Go ahead and check play in your bearings. If they are sloppy, they will just wear out new seals.

1974 CJ5 all stock except for Rocky Road SOA
Completely for hunting - not for show or rock climbing
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post #8 of 8 Old 01-30-2013, 06:02 PM
Bubba Ray
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Gear lube leaking from rear end. Smell it and u will know.
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