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Old 05-17-2014, 07:01 PM   #1
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2003 F53 Brake Issue

Replaced both rear calipers, installed new rear pads and bleed all four brakes three times. My issue is with the pedal feel. The first application of the pedal is very soft. It will easily travel almost to the floor and then will get harder as it is pumped. When the pedal has a hard feel the brakes seem normal. I did this job as soon as I took the unit out of storage and do not remember this feeling with the pedal last year. I have checked for leaks but do not see any. I am baffled. Any suggestions what to look for?
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Old 05-17-2014, 07:52 PM   #2
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As you were bleeding the brakes, did the reservoir ever get down so far as to suck air into the lines? If the pedal goes down so far each time you apply the brakes, but then get harder, it sounds like air in the system. I'd bleed them again.
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Old 05-17-2014, 08:08 PM   #3
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Some times the pedal feel can have the feeling of being spongy until the pads seat in. I just changed the front and rear pads in my motorhome today and the pedal is not as firm as it was prior to the change. I did not replace any calipers or bleed the system. Just a simple pad swap. If you feel comfortable driving, I would perform a slow test drive with multiple stops and also allowing for some time for the pads and rotors to cool off. The only way I know of to check for air in the system is to keep the engine off, I believe you can remove the brake pedal stop switch connector to disable the pump and feel the pedal with no assist. If there is no air it should feel pretty firm. If there is air, it will have excessive travel.
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Old 05-17-2014, 09:55 PM   #4
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Why did you replace the rear calipers.....could you have a bad master cylinder?
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Old 05-18-2014, 05:07 AM   #5
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Rear Calipers were original and prior pads were worn way past limits and damaged the calipers. When it was inspected the prior year the tech said front brakes good and rear ok. I just ran them to long last year as braking felt good. I heard a metal to metal sound as I took it out of storage this year and started this brake change. Thus new calipers.
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Old 05-18-2014, 06:50 AM   #6
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Sounds like you still have some air in the system.
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