Acura 46920-SD4-023 Clutch Master Cylinder Assembly (Nissin)

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Disconnect the cable from the negative battery terminal and working under the dashboard, remove the cotter pin from the master cylinder pushrod clevis and pull out the clevis pin to disconnect the pushrod from the pedal. Working in the engine compartment, remove the control box from the firewall and clamp a pair of locking pliers onto the clutch fluid feed hose, a couple of inches downstream of the reservoir. Disconnect the hydraulic lines at the cylinder, loosen the fluid feed hose clamp and detach the hose from the cylinder. Unscrew the two clutch master cylinder retaining bolts and remove the cylinder. Pullback the dust boot on the pushrod and remove the snap-ring, remove the stopper and pushrod from the cylinder, invert the cylinder and tap it against a block of wood to eject the piston assembly. Carefully disassemble the piston and one-way valve assembly, noting how the components are arranged, discard the rubber parts and clean the remaining parts with clean brake fluid or brake system cleaner. Inspect the bore of the cylinder for scratches, score marks, ridges and corrosion, if the bore isn't perfectly smooth, the cylinder must be replaced with a new or factory rebuilt unit. If the cylinder will be rebuilt, use all of the new parts contained in the kit and follow any specific instructions which may be included in the kit. Place the valve seal on the valve stem, then install the valve spring, the valve guide, the return spring, the spring retainer and the master piston, carefully stretch the rubber piston cups into position on the piston. Lubricate the cylinder bore and piston with brake fluid, then insert the valve and piston assembly into the cylinder bore, place the pushrod and stopper plate in the bore, compress the spring and install the snap ring. Place the master cylinder in position and install the mounting bolts finger tight, connect the hydraulic lines to the master cylinder, attach the fluid feed hose to the cylinder and tighten the hose clamp. Tighten the mounting bolts securely, then tighten the hydraulic line hose clamp and banjo bolt, connect the pushrod to the clutch pedal, use a new cotter pin to secure the clevis pin, remove the locking pliers from the feed hose, fill the clutch master cylinder reservoir with the with brake fluid conforming to DOT 3 specifications and bleed the clutch system.