Always ensure that the brake fluid is not spilt on a painted area as it will destroy the paint. In case of removal of the reservoir due to any reasons new grommets of mountings must be installed. When the cylinder has been emptied of the fluid, it is possible that it is easier to bench bleed the cylinder before installation. Clearance between the power booster pushrod and the master cylinder piston: This should be checked before installation. Start by wiping the master cylinder and lines of all dirt and grease and then unscrew and capped the brake lines off the master cylinder. Then disconnect the fluid level sensor coupling, where provided, unbolt and take the master cylinder out of the firewall or power booster, and service as necessary, changing the cylinder to booster mounting gasket. Install the mounting nuts (loosely) and also install the master cylinder and connect all the hydraulic lines without fully securing them at this point. Mounting nuts should be tightened to specification then the hydraulic lines tightened. Last but not least fill and bleed the system, and check the operation.