A prerequisite for the functioning of the brake booster is the correct adjustment of the ball head: 1 - supporting surface for the installation size a = 159±0.5 mm. When measuring, the ball head must be directed at a right angle to the surface of the brake booster. The measurement should be made without sealing to the end of the head. Brake booster ball head tightening torque: 30 Nm.
1. Turn off the engine, depress the brake pedal several times and hold it in the lowest position.
2. Start the engine. After that, the pedal should go down a little, if the pedal does not go down, then in most cases this is caused by the following reasons:
- Leakage in vacuum hose 1 between intake manifold and brake booster. In this case, replace the hose.
- The rubber ring 14 between the main brake cylinder and the brake booster is worn out. To replace the ring, the cylinder must be dismantled.
- Amplifier membrane defective. The membrane cannot be repaired. Have the entire brake booster kit replaced by a workshop.
Dual brake booster and brake master cylinder (wiring diagram): 1a - vacuum hose (1.6 L, 2.0 L - manual transmission), 1b - vacuum hose (1.6 l, 2.0 l, 3.0 l - automatic transmission, 3.0 l - manual transmission), 2 - screw with a cylindrical end 10 Nm, 3 - brake fluid reservoir with float indicator, 4 - cover, 5 - ground plug, 6 - brake booster, 7 - pedal bracket, 8 - hose, 9 - front wall, 10 - bolt 25 Nm, 11 - flanged nut 50 Nm, 12 - brake master cylinder (in case of failure, replace as a set), 13 - brake pipe 15 Nm, 14 - O-ring (After removing the brake master cylinder, replace).
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