Master Cylinder Replacement

Master Cylinder Replacement

Caution: Refer to Brake Fluid Irritant Caution.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice.

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the cover from the underhood electrical center.




3. Pull back on the connector position assurance (CPA) tab of the electrical connector, then disconnect the connector from the brake fluid level sensor.




4. Remove the underhood electrical center bracket from the vehicle and reposition the electrical center (1) to access the brake master cylinder.




5. Remove the brake master cylinder auxiliary reservoir.
6. Disconnect the brake pipes (1) from the master cylinder.
7. Cap the open brake pipe fitting ends to prevent brake fluid loss and contamination.




8. Remove the master cylinder mounting nuts.
9. Remove the master cylinder from the vacuum brake booster.




10. If the master cylinder is to be reused, inspect the master cylinder-to-vacuum brake booster seal (1) for damage. Replace the seal (1) if necessary.

Installation Procedure




1. Bench bleed the master cylinder.
2. Check to ensure that the master cylinder-to-vacuum brake booster seal (1) is properly seated into the recessed groove on the master cylinder.




3. Install the master cylinder to the vacuum brake booster.

Notice: Refer to Fastener Notice.

4. Install the brake master cylinder mounting nuts.

Tighten the nuts to 20 N.m (15 lb ft).




5. Remove the caps from the brake pipe ends.
6. Connect the brake pipe fittings (1) at the master cylinder.

Tighten the fittings to 18 N.m (13 lb ft).

7. Install the brake master cylinder auxiliary reservoir.




8. Install the underhood electrical center bracket to the vehicle and install the electrical center (1) into position on the bracket.




9. Connect the electrical connector to the brake fluid level sensor, then press forward on the CPA tab of the connector to secure.
10. Install the cover to the underhood electrical center.
11. Connect the negative battery cable.
12. Bleed the hydraulic brake system.