Rear Caliper Issues - JeepForum.com

 
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post #1 of 9 Old 08-22-2013, 06:41 PM Thread Starter
brandon789
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1991 YJ Wrangler 
 
Join Date: Jun 2013
Location: Raleigh
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Rear Caliper Issues

I recently bought a 1991 Wrangler with a ford dana 60 swapped in the rear. It has a disk brake conversion using 77 Cadillac eldorado rear calipers and pads/rotors from a early 80's Chevy k20. Both rear pads were worn and soon after I got it the passenger rear rotor started grooving. I went today to replace the pads and rotors but can't compress the caliper piston at all. I tried opening the bleeder valve but I'm still unable to compress the piston using a c-clamp. I also tried turning the piston but couldn't get either to turn. Am I going to have to replace the calipers or is there some way to get them to compress?

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post #2 of 9 Old 08-22-2013, 07:12 PM
Old4X
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http://www.studebaker-info.org/tech/...earCaliper.jpg

Is this your setup? Most likely the E brake system has the piston jacked out. Find a way to back it off.

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post #3 of 9 Old 08-22-2013, 08:33 PM
kloppk
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1992 YJ Wrangler 
 
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Agreed.
You need to loosen the e-brake adjuster. This will let the piston go in on those calipers.
Gotta have the bleeder open too.

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post #4 of 9 Old 08-22-2013, 10:46 PM Thread Starter
brandon789
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1991 YJ Wrangler 
 
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My setup is similar but not exact, the ebrake cable is disconnected and i made sure it is pushed all the way to the off side, do I have to do more to disconnect it?
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post #5 of 9 Old 08-22-2013, 10:47 PM Thread Starter
brandon789
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Tomorrow I'll buy the autozone tool and see if that helps at all.
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post #6 of 9 Old 08-22-2013, 11:01 PM
jokerchief462
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1989 YJ Wrangler 
 
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I looked on the web and found absolutely nothing to help. Are the caliper pistons rusted or real crappy??? I k ow some calipers actually screw back in. Best I got good luck.

Take a caliper with you to the parts house never know who's behind the counter.

89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

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post #7 of 9 Old 08-23-2013, 12:05 AM Thread Starter
brandon789
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1991 YJ Wrangler 
 
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Location: Raleigh
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Calipers look pretty good, no rust or anything just flaking paint. I'll try the tool, it rotates while pushing in and if that fails i'll have to take the calipers in and get replacements.
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post #8 of 9 Old 08-23-2013, 11:42 AM
XJ93
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1993 ZJ 
 
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If nothing is coming out at the bleeder screw, try loosening the banjo bolt slightly and see if that relieves pressure. If it does than your hose is to blame. I see it all the time at NAPA.
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post #9 of 9 Old 08-23-2013, 03:30 PM Thread Starter
brandon789
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1991 YJ Wrangler 
 
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Alright so I got the autozone tool and it didn't help but then I decided to pull off the caliper and drain the fluid. I still couldn't compress the piston so I pulled off the ebrake lever on teh back and undid the ebrake part and suddenly it was easy to compress all the way. I also noticed even when it was stuck out i could pull the ebrake lever and the piston would come out more but not return. Is this a fault of hte ebrake part of the caliper? It seems like somehow it is pushing the piston out but not allowing it to return. It would also explain why the brakes wore out so quickly. Any ideas on if this is the issue or how to fix it?
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