2004 Nissan Murano — Repair Manual - Brake System (Section BR)
Install the brake hose to the caliper assembly positioning hole and tighten union bolt to the specified torque. Install brake hose to the brake tube, partially tighten the flare nut as must as possible by hand, then secure it to the bracket with lock plate. While depressing brake pedal under a force of 785 N (80 kg, 177 lb) with engine running at idle speed for approximately 5 seconds, check each part for fluid leakage.
Using a flat-bladed screwdriver as shown in the figure, lift up the tabs on the stopper cap and remove it from the master cylinder. The piston inside the master cylinder might pop out when this is done, so hold the stopper cap down at the same time. Place the side flange of cylinder body with chamfering around the pin insertion hole facing up, and firmly set master cylinder assembly in a vise.
When setting securing with a vise, use copper plates or cloth to protect the flange. Using a flat-bladed screwdriver, push in the piston and remove piston stopper from cylinder body. Carefully pull the primary piston assembly straight out to prevent cylinder inner wall from being damaged.