brake troubles

[Cummins Cowboy]

lately i have noticed i have to push a little harder on my brake pedal. I didn't think much about it until sitting in the driveway while reading some mail with my foot on the brake i notice the pedal slowly go down toward the floor. what would cause this, it goes down really slow and is not noticeable unless you hold the brake at a certain point and don't move your foot

 

[hdm48]

Sounds like a bad master cylinder to me. one of the sealing cups has a groove in it or it's just old and worn out. one thing though. when you buy a new one, make sure it is a new one and not a re-man unit. after doing this kind of stuff for 30 years it's always better to buy new rather than someones old troubles. and flush out the whole system too.



good luck

 

[R.E. Miller]

Yup, I would put money on the master cylinder. I just put one in my 1-ton dump for the same reason.

Good luck