Removal and installation the brake booster (Opel Vivaro A)

Removal

1. Remove the brake master cylinder.

2. Remove the brake pedal axle stopper A, the brake pedal axle, unscrew the two brake booster mounting nuts B and remove the brake booster (figure 8.2).

Installation

3. Installation is carried out in the reverse order of removal.

Checking for leaks

4. When checking the tightness of the brake booster, make sure that the joint between the brake booster and the master cylinder is tight. If there are leaks, replace gasket A (figure 8.3).





5. The tightness of the vacuum booster is checked on a vehicle with a fully functional hydraulic brake drive. Connect a vacuum pump between the vacuum booster and the vacuum source (intake manifold), using a tee and a pipe of the shortest possible length whenever possible. Allow the engine to idle for one minute to establish normal operating vacuum in the intake manifold. Clamp the hose (clamp Mot. 453-01) between the tee and the vacuum source. Stop the engine. If the vacuum drops quickly, it means that one of the elements of the vacuum circuit is faulty and/or an error was made during assembly. Check the tightness of pipeline connections, connections of system elements, and system elements.

Tightening torques

Brake and clutch hydraulic fluid reservoir mounting bolt - 8 Nm.

Master brake cylinder mounting nuts - 25 Nm.

Brake booster mounting nuts - 21 Nm.