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Old 02-23-2011, 11:54 PM
billrath14 billrath14 is offline
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Default peddle slowly drops

I have a 92 150. When I put the brakes on I got good peddle but if I sit with my foot on it, it will slowly drop down, The "anti lock " light will come on also. I have put a rebuilt master cylinder on along with a new power booster, new pads and shoes. I have also purged the lines. both of the problems may not be connected because the antilock light comes on when I start the truck then goes out. And some times it will stay off when I brake then let off befor the peddle drops very far.
Thanks in-advance Bill

Last edited by billrath14; 02-24-2011 at 09:22 AM.
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Old 02-24-2011, 09:42 AM
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My first suspicion would be the master cylinder.
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Old 03-30-2011, 10:53 PM
billrath14 billrath14 is offline
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replaced the master cylinder and bleed the brakes 3 times. The problem is still there. The peddle has 4 inches of travel before it starts slowing down the truck. it also fells mushy under "hard" braking, I can not get this truck to stop fast like it should.
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Old 03-31-2011, 05:54 PM
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There's still a pressure problem and I'd suspect one of the slave cylinders on the wheels aren't working. They corrode and/or the caps and plungers aren't moving properly.
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