Contaminated brake system - Dodge Cummins Diesel Forum
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post #1 of 3 (permalink) Old 09-05-2019, 06:03 PM Thread Starter
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I have been having braking issues of 1 wheel locking up. I replaced the hose and the caliper twice. I flushed system with new synthetic fluid and its still sticking. I went to remove the cap to add some to the reservoir and the rubber inside is swollen as if oil of some type got into the system. I have no idea how it could have but would I still need to replace entire system or just what goes to the one wheel that's sticking?


03 555, Suncoast full billet TD, rack a gauges-rail,FP,egt,boost,tranny. 3" lift. Raptor 150. At some twins. 60 hp injectors. ride right bags.90 model 12v dually blows alot of smoke.
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post #2 of 3 (permalink) Old 09-05-2019, 06:08 PM
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If it were me, Iíd flush the whole system. These master cylinders can move some serious fluid so it shouldnít take long, even if manually pumping it through the brakes. A buddy or Dr Pepper bottle and some hose will be your best friend!

I didnít quite understand, have you replaced both the caliper and the hose? Or just the hose?

It sounds like thereís some sort of junk in the caliper, or the piston has froze up....not really like bad fluid.

One other possibility, as itís happened on my trucks, the hard lines being to corrode and swell, so you may not be getting the correct fluid flow to it.

Just a couple things to check.


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post #3 of 3 (permalink) Old 09-05-2019, 06:11 PM Thread Starter
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Yes the hose on that side and that caliper twice. I have flushed the system and went with synthetic dot 4

03 555, Suncoast full billet TD, rack a gauges-rail,FP,egt,boost,tranny. 3" lift. Raptor 150. At some twins. 60 hp injectors. ride right bags.90 model 12v dually blows alot of smoke.
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