How to do a push rod adjustment??

I'm aware of that. The previous owner did some work on the rear brakes( to what extent, I'm not sure and I can't ask cause he passed away unfortunately.). I want to check the push rod and if necessary, adjust it. I'm fully aware that push rod length doesn't change on its own.

You stated "brakes keep building up pressure".. That sounds to me like something is 'changing' as you drive .. If that's the case the pushrod is not the problem .. If it were, it would start out that way from the beginning!

Ok thank you for your information. Does anyone else know how to check the push rod on a 1994 chevy tracker??

Got 'free play' in the brake pedal when first starting out ?? Simple question and easy to check by using hand to move pedal BEFORE starting engine and vacuum is applied to the >>**BOOSTER**<< ...!!! One more simple question... How did the pushrod length change???