QUOTE(Spoke @ Sep 4 2023, 07:04 PM)
Question about brake pressure: How does one test their brake system if it appears pressure is remaining in the system after the peddle is pressed? Is there a pressure gauge that can be put in place of a caliper to see if after the peddle is pressed the system pressure goes to zero?
If you suspect residual pressure in the system...open a bleed screw and see if the wheel becomes easier to turn...if it does, you have a residual pressure problem. Now go over and try the other side (same end) and see if it also became easier to turn after having loosened the first bleeder....
if it did, then you have an issue with master cylinder holding pressure due to either the pedal not returning all the way, the pistons in the master not returning all the way, or possible contamination that caused the seals in the master to expand.
If the other wheel is still dragging, crack the bleeder...if it gets easier, you have constricted hoses.
If neither gets easier to turn when you open the bleeders, you have sticking calipers.