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Old 09-26-2010, 11:18 AM   #1
adub
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Brake Help

I recently bought a rough 2003 Kawasaki Prairie 360 4x4. Front brakes are single piston calipers. P/O wore the pads down to the backing plates and left it so the pistons rusted up and froze. I replaced the calipers with some used units in good shape, even took the master cyl apart and inspected/cleaned.

The master will compress but it is very very slow to return. I have tried bleeding with a mighty vac and it just keeps sucking air bubbles, but I cannot find a leak anywhere. I'm out of ideas. Any help would be appreciated

TIA

AW
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Old 09-26-2010, 01:21 PM   #2
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If it's an '03 and it's in rough shape the brake lines may be porous.
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Old 09-26-2010, 02:44 PM   #3
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Is there a way to test or just replace parts until it works?
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Old 09-26-2010, 04:09 PM   #4
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Quote:
Originally Posted by adub View Post
Is there a way to test or just replace parts until it works?
Look at the line and see if you see any dry rot on it. That would be a good indicator.
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Old 09-26-2010, 04:54 PM   #5
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I looked over the lines checking for leaks, they aren't dry rotted
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Old 09-26-2010, 05:32 PM   #6
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Have you tried bleeding by hand? Mighty vacs can give you false feedback if air seeps past the blender threads or around the bleeder nipple. Also try completely removing the bleeders and make sure the hole in the bleeder isn't full of trash.
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Old 09-26-2010, 06:17 PM   #7
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I tried bleeding by hand and removing the bleeders, didn't get anywhere.
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Old 09-27-2010, 08:09 PM   #8
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Any merit in rebuilding the master cylinder or am I wasting my time?
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