Chevrolet Captiva Manuals

Chevrolet Captiva Service & Repair Manual: Brake Master Cylinder R&R

Chevrolet Captiva Service & Repair Manual / Brakes / Brake Master Cylinder R&R

Removal

1. Using a suitable tool, remove the brake fluid from the brake master cylinder reservoir.
2. Discard the brake fluid into an approved container.
3. Remove the underhood electrical center.
4. Without draining the coolant or removing the hoses, remove and position aside the radiator surge tank.
5. Disconnect the master cylinder fluid level sensor electrical connector (1), Fig. 1.
6. Disconnect the master cylinder primary brake pipe fitting (2), Fig. 1.
7. Cap the brake pipe fitting and plug the master cylinder outlet port to prevent brake fluid loss and contamination.
8. Disconnect the master cylinder secondary brake pipe fitting (3), Fig. 1.
9. Cap the brake pipe fitting and plug the master cylinder outlet port to prevent brake fluid loss and contamination.
10. Remove the master cylinder nuts (1), Fig. 2.
11. Remove the master cylinder (2), Fig. 2.

Installation

1. If installing a new master cylinder, bench bleed the master cylinder.
2. Install the master cylinder.
3. Install the master cylinder nuts and torque to 18 ft. lbs.
4. Connect the master cylinder fluid level sensor electrical connector.
5. Connect the master cylinder primary brake pipe fitting and torque to 13 ft. lbs.
6. Connect the master cylinder secondary brake pipe fitting and torque to 13 ft. lbs.
7. Install the radiator surge tank.
8. Install the underhood electrical center.
9. Bleed the hydraulic brake system.

Bench Bleeding

1. Secure the mounting flange of the brake master cylinder in a bench vice so that the rear of the primary piston is accessible.
2. Remove the cap from the hose nipple on the master cylinder reservoir.
3. Install suitable fittings to the master cylinder ports that match the type of flare seat required and also provide for hose attachment.
4. Install transparent hoses to the fittings installed to the master cylinder ports, then route the hoses into the master cylinder reservoir, Fig. 3.
5. Ensure that the ends of the transparent hoses running into the master cylinder reservoir are fully submerged in the brake fluid.
6. Using a smooth, round-ended tool, depress and release the primary piston as far as it will travel, a depth of about one inch, several times. Observe the flow of fluid coming from the ports. As air is bled from the primary and secondary pistons, the effort required to depress the primary piston will increase and the amount of travel will decrease.
7. Continue to depress and release the primary piston until fluid flows freely from the ports with no evidence of air bubbles.
8. Remove the transparent hoses from the master cylinder reservoir.
9. Install the cap to the hose nipple on the reservoir, to prevent fluid loss and contamination.
10. Remove the fittings with the transparent hoses from the master cylinder ports. Wrap the master cylinder with a clean shop cloth to prevent brake fluid spills.
11. Remove the master cylinder from the vice.

Fig. 1

Fig. 2

Fig. 3

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