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Unread 11-20-2013, 12:14 AM   #1
teddysplxj42
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Wheel cylinder keeps blowing

So I've replaced my passenger side wheel cylinder about 5 times in the past month because it keeps blowing out on me. At first I thought that there was air in the lines, so I bled all my lines. There was a little air in it but I got it all out and hooked everything back up, and they worked until the other day when the wheel cylinder blew again. I was told maybe the proportioning valve not sending the right pressure through, I just wanna make sure of all the possibilities

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Unread 11-20-2013, 07:54 AM   #2
Bobplymouth
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The proportioning valve is there to allow a little more pressure to the front than the rear,

but even if all pressure was going to the front, the wheel cylinder should not blow out..
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Unread 11-20-2013, 09:23 AM   #3
jeepster383
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Pics of how it's instaled. Shoes not adjusted corectly allowing the pins to push out all the way? Or is it just leaking from the boots? Where are you geting the replacements?
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Unread 11-20-2013, 12:44 PM   #4
psychoteen101
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Blowing out as in they start leaking or its actually pushing the pistons out of the cylinder?
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Unread 11-20-2013, 05:46 PM   #5
teddysplxj42
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It's literally pushing the piston out of the cylinder every time
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Unread 11-20-2013, 07:23 PM   #6
AZ Jeff
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Quote:
Originally Posted by teddysplxj42 View Post
It's literally pushing the piston out of the cylinder every time
Then you have an assembly or an adjustment issue. When assembled correctly, and adjusted per procedure, the pistons CANNOT move far enough to come out of their bores on the wheel cylinder.

Are you SURE you have everything assembled correctly, with the proper parts?
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Unread 11-20-2013, 07:30 PM   #7
teddysplxj42
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It's all hooked up correctly with the right parts, I even changed that line because it broke the first time the wheel cylinder blew. They all bleed correctly and everything also
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Unread 11-20-2013, 07:37 PM   #8
bigbill888
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wrong brake drum?
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Unread 11-20-2013, 07:45 PM   #9
teddysplxj42
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It's the same drum I've had on it since I got it. It definitely needs new shoes for the drum. Could bad drums and shoes be doing this?
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Unread 11-20-2013, 08:01 PM   #10
bigbill888
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You changed the wheel cyl, but not the shoes?
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95 ZJ Limited, 4.0, 242, 140K
98 XJ Sport, 4.0, 231, 140K
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Unread 11-20-2013, 08:08 PM   #11
bigbill888
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before you step on the brake pedal, the brakes need to be adjusted out to the point where they just barely touch the drum when you spin it.
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95 ZJ Limited, 4.0, 242, 140K
98 XJ Sport, 4.0, 231, 140K
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Unread 11-20-2013, 09:56 PM   #12
jeepster383
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You are installing the drum before pushing on the Brake pedal right
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Unread 11-20-2013, 10:01 PM   #13
teddysplxj42
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Quote:
Originally Posted by jeepster383
You are installing the drum before pushing on the Brake pedal right
I want to say yes but now that I think about it I don't actually know lol
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Unread 11-20-2013, 10:29 PM   #14
jeepster383
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Quote:
Originally Posted by teddysplxj42
I want to say yes but now that I think about it I don't actually know lol
Lol you need the drums on if u need to bleed brakes. U can't have the drums off if you push the brake pedal or youl push the pistons right out.
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Unread 11-20-2013, 10:39 PM   #15
teddysplxj42
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Lol I'm gonna get some new shoes for it and try it again, maybes that's what the problem was
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