REMOVAL & INSTALLATION
See Figures 1 through 7
Before removing the master cylinder, cover the body surfaces with fender covers and shop towels or plastic sheeting to prevent damage to painted surfaces by brake fluid. If any fluid does contact painted or anodized surfaces, wipe the fluid off immediately.
The brake fluid in the reservoir may be sucked out with a clean turkey baster or other similar device prior to removing the brake lines.
- Disconnect the fluid sensor lead.
- Disconnect and plug the brake lines from the master cylinder.
- Remove the master cylinder-to-vacuum booster attaching bolts and the master cylinder from the vehicle.
- Install the master cylinder to the booster and tighten the mounting nuts to 11 ft. lbs. (15 Nm).
- Connect the brake lines to the master cylinder. Tighten them to 14 ft. lbs. (19 Nm).
Be sure to use a line wrench when connecting the brake lines. Standard open end wrenches may slip and round over the fittings. Never use any other lubricant for brake line fittings than clean brake fluid.
See Figures 8 through 18
Before beginning this procedure, make sure you have available a master cylinder rebuild kit, or the necessary internal replacement parts to repair what you take apart. If you are unable to obtain the parts needed, you may have to forego the following procedure and replace the faulty master cylinder with a new one.
- Remove the master cylinder from the vehicle and mount it securely on a bench vise being cautious not to clamp it too hard.
- Remove the reservoir cap, fluid level sensor, filter and seal.
- Remove the outer snapring from the secondary piston assembly. Remove the washer secondary cup and secondary piston bushing.
- Remove the stop bolt, and remove the inner snapring while pushing on the secondary piston assembly.
- Remove the primary piston assembly from the bore.
- Remove the screw from the secondary piston and remove the spring.
- Clean all parts thoroughly, with clean brake fluid.
Use only clean brake fluid to clean master cylinder components. Other solvents may damage the components.
- Lubricate new piston assemblies with brake fluid then install them in the master cylinder body.
- Press down on the piston assembly and install the stop bolt in the master cylinder body. Tighten the stop bolt to 7 ft. lbs. (10 Nm).
- Again press down on the piston assembly and install the inner snapring.
- Install the secondary cups, bushing and outer snapring.
- Insert a new seal on the master cylinder mounting flange and install the master cylinder in the vehicle. Bleed the brake system when finished.
The Honda Motor Co. does not recommend disassembly of the master cylinder assembly for 1988-95 models. If a master cylinder for a 1988-95 Civic is found to be faulty, replace the unit with a new one.