SRAM HydroR Service Manual page 20

Stop Plate Gen. 2: Use a mallet and a pin-removal punch to gently tap
out the roll pin.
Remove the thread forming screw from the stop plate in the hood, then
remove the stop plate and reach adjust pushrod.
10 Place a shop towel over the master piston, and apply light pressure to
the piston. This will prevent the piston from rapidly ejecting from the
brake assembly.
11 Apply gentle pressure to the bleed syringe until the master piston
protrudes from the bore far enough to be grabbed with your fingers.
Pull the master piston out of the bore by hand.
Pin removal punch Mallet
Phillips #2
Master piston
Master Cylinder Piston Removal
Roll pin
Pick
Shop towel
20