Assembling the piston and piston o-ring
Before assembly, flush the piston and cylinder with alcohol or the brake fluid used.
Lubricate the piston o-ring and special tool with brake fluid.
Used brake fluid: D0T3 or D0T4.
Slide the piston sealing ring onto the special mandrel with the sharp edge facing up and then, lowering it down the mandrel, install it into the piston groove.
Attention! To avoid twisting or misalignment of the piston o-ring during installation, lower it slowly and carefully in one motion without stopping.