Brakes dragging question

[AussieinNC]

MoFormula...

Your issue sounds like the new booster pushrod thats goes into the master cylinder is set too deep...

To test this out...remove the two nuts that mount the master to the booster and add two metal washers over each stud, then replace the master cylinder and retest...

If the symptoms have gone away, remove the two nuts again and adjust the push rod in the booster to reduce the length that goes into the master...two washers is usually about an 1/8th of an inch....

It only takes a small amount of excess length in that rod to not allow the master cylinder piston to not open the return ports fully, keeping slight pressure in the circuits, essentially riding the brakes...

Also, if you also changed your master cylinder, make sure the front circuit outlet port does not have a residual line valve in that port...remove the front metal line and use a paper clip to probe into the port seat...if you feel a rubber valve in there it needs to come out of that front port...

4 wheel drum brake masters need those residual line valves in place in both ports,,,disk brake systems should not have residual line valves in any circuit feeding a disk system,,,either front or rear...