Question about 1991 Dodge Ram 350
Soft brake peddle, bled the brakes, changed the master and still wont pump up
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Posted on Jan 02, 2017
The problem may be that the master cylinder needs to be bench bled,there is most likely air trapped in the piston of the master cylinder.The problem comes from the piston not being fully actuated when connected to the pedal assembly.A vacuum bleeder will generally pull it out.
Posted on May 25, 2009
Excessive runout or wobble in a disc (Rotor) can increase pedal travel due to piston knockback and increase piston seal wear due to necessity of caliper to follow disc wobble. Thickness variation in a disc can also result in pedal pulsation, chatter and surge due to variation in brake output when disc section is uneven. Dishing or distortion can be caused by extreme heat and abuse of the brakes. Hope this helps, Good luck.
Posted on Apr 09, 2010
what it sounds like to me and I pretty much only work on cummins and powerstroke trucks. your problem seems that your calipers are worn and are not holding the pressure. and or the lines going to them have faded and caused them to ballon or stretch. if the pedal is vary hard to puch hydraboost and worn parts but if the pedal isnt hard then your hydrabosst should be fine as i said most likley your rubber brake lines in front and worn calipers
Posted on Apr 27, 2010
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